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Created February 21, 2018 21:21
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Python ICEF 2018, Lecture 1
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Untitled.ipynb
{
"cells": [
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "# Anaconda Python 3.6\n# Sage Cloud\nprint(2 + 3)",
"execution_count": 2,
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": "5\n"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "x = 10",
"execution_count": 6,
"outputs": []
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "print(x)",
"execution_count": 7,
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": "10\n"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "print(x + 1)",
"execution_count": 8,
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": "11\n"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "фыва = 12\nпролдж = 20\nprint(фыва + пролдж)",
"execution_count": 9,
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": "32\n"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "type(10)",
"execution_count": 10,
"outputs": [
{
"data": {
"text/plain": "int"
},
"execution_count": 10,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "type(x)",
"execution_count": 11,
"outputs": [
{
"data": {
"text/plain": "int"
},
"execution_count": 11,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "x = x / 2",
"execution_count": 12,
"outputs": []
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "x",
"execution_count": 13,
"outputs": [
{
"data": {
"text/plain": "5.0"
},
"execution_count": 13,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "type(x)",
"execution_count": 14,
"outputs": [
{
"data": {
"text/plain": "float"
},
"execution_count": 14,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "13 // 2",
"execution_count": 15,
"outputs": [
{
"data": {
"text/plain": "6"
},
"execution_count": 15,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "13 % 3",
"execution_count": 16,
"outputs": [
{
"data": {
"text/plain": "1"
},
"execution_count": 16,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "7 ^ 2",
"execution_count": 17,
"outputs": [
{
"data": {
"text/plain": "5"
},
"execution_count": 17,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "5 ^ 3",
"execution_count": 18,
"outputs": [
{
"data": {
"text/plain": "6"
},
"execution_count": 18,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "5 ** 3",
"execution_count": 19,
"outputs": [
{
"data": {
"text/plain": "125"
},
"execution_count": 19,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "123 ** 1237",
"execution_count": 23,
"outputs": [
{
"data": {
"text/plain": "163163439059267607766412588358432720764705585651376777801072556931204787091754549301755268283813502170051856836680873868228125359931910185967884141024967430197994038178708872718306208290447758206889637182108748411903369547519160564574335039394649337847229729467181183283493552600023531977565461283740514523594929951230900918463896917693073750482004634784484650871409384367944004652198870079831873381976275579136398611523067002670179788326213613911587642552434426112669778416252890947194388388373589703361171183806894622985557865715338233327379829792369623292283207756724423169460076436853502321387040596879585083939223070286630378267368024534573120185449041159999021346351276303365557997666213823859665709424065889684161207276180024239065678637095114164654748797822860718722833019070562280005417912154061405363995749633122389584067690180973844335732790462475178434080478468662646080813914320852933004970659281654210897477595619827698883861454423138500083404191321166585164643487874242381490489378262729439077616991592788720182347951700470672999729941231780959895106061473103912055116057262453888844248880819777672040817565683761418332366238666972221902799822378218812501471496123966365548081264116879031509627700145165440364783596733159882690347400078514050542007655584746205237361154629037274677394603499336197693256816564464104928867652395220247492121865022559480785812811819578740374262094522283711766337360396638515867495449398141460388495996675408468363637963127139917545210555753963983995383041509273746112062320769080641564355656252272888174786766454371097708423151002897775496233662523752177342422606841426970886561734460149383584606785394262217985363534134675066919104265496336256595768786243969452867099151194514806954322894053005061644899384294101444973653564402661781481026503980438909167191304492751069660241883899394311836979854218730944666928269875212030382724895293929807582787923983972052383831536514697439364764872327843723670925762770612293887630491275121986026197403740417794740897572130505888792228202905246577737077348147151311915174115671551090626882976769118975110392097983601973419815407198095031730489412188380437918911517136879030537071434718326132729541335921589361096227649831933753831199091814600736494284471976090350542048925926768231575632195589993873142198179552898927437383533873544673646435022014135057233647477546035926427792862450414267230162669315167612414324032551661501419252305974569320840025683561560319698727890410218236771540636103617690626117086903671091096334978494639680930124033624610633893733202256093892564661171418593399070850003403403"
},
"execution_count": 23,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "123. ** 1237.",
"execution_count": 22,
"outputs": [
{
"ename": "OverflowError",
"evalue": "(34, 'Result too large')",
"output_type": "error",
"traceback": [
"\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
"\u001b[0;31mOverflowError\u001b[0m Traceback (most recent call last)",
"\u001b[0;32m<ipython-input-22-10b5c1c7e341>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m()\u001b[0m\n\u001b[0;32m----> 1\u001b[0;31m \u001b[0;36m123.\u001b[0m \u001b[0;34m**\u001b[0m \u001b[0;36m1237.\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m",
"\u001b[0;31mOverflowError\u001b[0m: (34, 'Result too large')"
]
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "s = \"Hello, World!\"",
"execution_count": 24,
"outputs": []
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "w = 'Another test'",
"execution_count": 25,
"outputs": []
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "\"'\"",
"execution_count": 26,
"outputs": [
{
"data": {
"text/plain": "\"'\""
},
"execution_count": 26,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "\"\\\"\\'\"",
"execution_count": 27,
"outputs": [
{
"data": {
"text/plain": "'\"\\''"
},
"execution_count": 27,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "print(\"Hello\\nWorld!\")",
"execution_count": 28,
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": "Hello\nWorld!\n"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "w + \". \" + s",
"execution_count": 31,
"outputs": [
{
"data": {
"text/plain": "'Another test. Hello, World!'"
},
"execution_count": 31,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "\"123\" + 45",
"execution_count": 32,
"outputs": [
{
"ename": "TypeError",
"evalue": "must be str, not int",
"output_type": "error",
"traceback": [
"\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
"\u001b[0;31mTypeError\u001b[0m Traceback (most recent call last)",
"\u001b[0;32m<ipython-input-32-0241dda82932>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m()\u001b[0m\n\u001b[0;32m----> 1\u001b[0;31m \u001b[0;34m\"123\"\u001b[0m \u001b[0;34m+\u001b[0m \u001b[0;36m45\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m",
"\u001b[0;31mTypeError\u001b[0m: must be str, not int"
]
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "type(10)",
"execution_count": 33,
"outputs": [
{
"data": {
"text/plain": "int"
},
"execution_count": 33,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "type(\"123\")",
"execution_count": 34,
"outputs": [
{
"data": {
"text/plain": "str"
},
"execution_count": 34,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "int(\"123\")",
"execution_count": 35,
"outputs": [
{
"data": {
"text/plain": "123"
},
"execution_count": 35,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "int(\"hello\")",
"execution_count": 36,
"outputs": [
{
"ename": "ValueError",
"evalue": "invalid literal for int() with base 10: 'hello'",
"output_type": "error",
"traceback": [
"\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
"\u001b[0;31mValueError\u001b[0m Traceback (most recent call last)",
"\u001b[0;32m<ipython-input-36-a6f1987f81d0>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m()\u001b[0m\n\u001b[0;32m----> 1\u001b[0;31m \u001b[0mint\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m\"hello\"\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m",
"\u001b[0;31mValueError\u001b[0m: invalid literal for int() with base 10: 'hello'"
]
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "\"123\"",
"execution_count": 37,
"outputs": [
{
"data": {
"text/plain": "'123'"
},
"execution_count": 37,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "str(123)",
"execution_count": 38,
"outputs": [
{
"data": {
"text/plain": "'123'"
},
"execution_count": 38,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "s = input(\"Enter your name:\")\nprint(s, \", Hello\")",
"execution_count": 2,
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": "Enter your name:\n , Hello\n"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "7",
"execution_count": 1,
"outputs": [
{
"data": {
"text/plain": "7"
},
"execution_count": 1,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "import os\nos.getcwd()",
"execution_count": 3,
"outputs": [
{
"data": {
"text/plain": "'/Users/user/prj/oldhse-2010-11/repo/2017-18/icef-python'"
},
"execution_count": 3,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "# Задача: ввести с клавиатуры целое число, увеличить на 1 и вывести\nx = input()\nx = int(x)\nprint(x + 1)",
"execution_count": 8,
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": "74\n75\n"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "sqrt(100)",
"execution_count": 9,
"outputs": [
{
"ename": "NameError",
"evalue": "name 'sqrt' is not defined",
"output_type": "error",
"traceback": [
"\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
"\u001b[0;31mNameError\u001b[0m Traceback (most recent call last)",
"\u001b[0;32m<ipython-input-9-79301f9b64f1>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m()\u001b[0m\n\u001b[0;32m----> 1\u001b[0;31m \u001b[0msqrt\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;36m100\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m",
"\u001b[0;31mNameError\u001b[0m: name 'sqrt' is not defined"
]
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "import math",
"execution_count": 10,
"outputs": []
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "math.sqrt(100)",
"execution_count": 11,
"outputs": [
{
"data": {
"text/plain": "10.0"
},
"execution_count": 11,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "math.sin(math.pi)",
"execution_count": 14,
"outputs": [
{
"data": {
"text/plain": "1.2246467991473532e-16"
},
"execution_count": 14,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "import math as mt",
"execution_count": 15,
"outputs": []
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "mt.sin(mt.pi)",
"execution_count": 16,
"outputs": [
{
"data": {
"text/plain": "1.2246467991473532e-16"
},
"execution_count": 16,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "from math import sin, pi",
"execution_count": 19,
"outputs": []
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "sin(pi)",
"execution_count": 20,
"outputs": [
{
"data": {
"text/plain": "1.2246467991473532e-16"
},
"execution_count": 20,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "# не делайте так:\n# from math import *",
"execution_count": 21,
"outputs": []
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "cos(tan(sqrt(10)))",
"execution_count": 22,
"outputs": [
{
"data": {
"text/plain": "0.9997860118447779"
},
"execution_count": 22,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "from math import sin as sinus",
"execution_count": 23,
"outputs": []
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "sinus(pi)",
"execution_count": 24,
"outputs": [
{
"data": {
"text/plain": "1.2246467991473532e-16"
},
"execution_count": 24,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "x = 123",
"execution_count": 25,
"outputs": []
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "x",
"execution_count": 26,
"outputs": [
{
"data": {
"text/plain": "123"
},
"execution_count": 26,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "del x",
"execution_count": 27,
"outputs": []
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "x",
"execution_count": 28,
"outputs": [
{
"ename": "NameError",
"evalue": "name 'x' is not defined",
"output_type": "error",
"traceback": [
"\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
"\u001b[0;31mNameError\u001b[0m Traceback (most recent call last)",
"\u001b[0;32m<ipython-input-28-6fcf9dfbd479>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m()\u001b[0m\n\u001b[0;32m----> 1\u001b[0;31m \u001b[0mx\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m",
"\u001b[0;31mNameError\u001b[0m: name 'x' is not defined"
]
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "del math",
"execution_count": 29,
"outputs": []
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "math.sin(0)",
"execution_count": 30,
"outputs": [
{
"ename": "NameError",
"evalue": "name 'math' is not defined",
"output_type": "error",
"traceback": [
"\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
"\u001b[0;31mNameError\u001b[0m Traceback (most recent call last)",
"\u001b[0;32m<ipython-input-30-3210f964cf2a>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m()\u001b[0m\n\u001b[0;32m----> 1\u001b[0;31m \u001b[0mmath\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0msin\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;36m0\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m",
"\u001b[0;31mNameError\u001b[0m: name 'math' is not defined"
]
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "from math import pi",
"execution_count": 33,
"outputs": []
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "pi",
"execution_count": 34,
"outputs": [
{
"data": {
"text/plain": "3.141592653589793"
},
"execution_count": 34,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "print(f\"pi = {pi}.\")",
"execution_count": 37,
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": "pi = 3.141592653589793.\n"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "x = 2\ny = 4\nprint(f\"{x} + {y} = {x + y}\")",
"execution_count": 39,
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": "2 + 4 = 6\n"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "print(\"{x} + {y} = {x + y}\")",
"execution_count": 40,
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": "{x} + {y} = {x + y}\n"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "print(f\"pi = {pi:0.4f}.\")",
"execution_count": 49,
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": "pi = 3.1416.\n"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "my_list = [0, 10, 20, 30, 40]",
"execution_count": 50,
"outputs": []
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "my_list",
"execution_count": 51,
"outputs": [
{
"data": {
"text/plain": "[0, 10, 20, 30, 40]"
},
"execution_count": 51,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "my_list[2]",
"execution_count": 52,
"outputs": [
{
"data": {
"text/plain": "20"
},
"execution_count": 52,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "my_list[2] = 200",
"execution_count": 53,
"outputs": []
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "my_list",
"execution_count": 54,
"outputs": [
{
"data": {
"text/plain": "[0, 10, 200, 30, 40]"
},
"execution_count": 54,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "my_list.append(50)",
"execution_count": 58,
"outputs": []
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "my_list",
"execution_count": 59,
"outputs": [
{
"data": {
"text/plain": "[0, 10, 200, 30, 40, 50, 50]"
},
"execution_count": 59,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "my_list[7] = 120",
"execution_count": 62,
"outputs": [
{
"ename": "IndexError",
"evalue": "list assignment index out of range",
"output_type": "error",
"traceback": [
"\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
"\u001b[0;31mIndexError\u001b[0m Traceback (most recent call last)",
"\u001b[0;32m<ipython-input-62-85fa52ec8ecd>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m()\u001b[0m\n\u001b[0;32m----> 1\u001b[0;31m \u001b[0mmy_list\u001b[0m\u001b[0;34m[\u001b[0m\u001b[0;36m7\u001b[0m\u001b[0;34m]\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0;36m120\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m",
"\u001b[0;31mIndexError\u001b[0m: list assignment index out of range"
]
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "my_list[-3]",
"execution_count": 64,
"outputs": [
{
"data": {
"text/plain": "40"
},
"execution_count": 64,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "my_list",
"execution_count": 65,
"outputs": [
{
"data": {
"text/plain": "[0, 10, 200, 30, 40, 50, 50]"
},
"execution_count": 65,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "my_list[-1]",
"execution_count": 66,
"outputs": [
{
"data": {
"text/plain": "50"
},
"execution_count": 66,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "len(my_list)",
"execution_count": 67,
"outputs": [
{
"data": {
"text/plain": "7"
},
"execution_count": 67,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "my_list[len(my_list)-1]",
"execution_count": 68,
"outputs": [
{
"data": {
"text/plain": "50"
},
"execution_count": 68,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "my_list",
"execution_count": 71,
"outputs": [
{
"data": {
"text/plain": "[0, 10, 200, 30, 40, 50, 50]"
},
"execution_count": 71,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "my_list[1:3]",
"execution_count": 79,
"outputs": [
{
"data": {
"text/plain": "[10, 200]"
},
"execution_count": 79,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "my_list[1:3 + 2]",
"execution_count": 78,
"outputs": [
{
"data": {
"text/plain": "[10, 200, 30, 40]"
},
"execution_count": 78,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "my_list[3:]",
"execution_count": 74,
"outputs": [
{
"data": {
"text/plain": "[30, 40, 50, 50]"
},
"execution_count": 74,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "my_list[:3] + my_list[3:]",
"execution_count": 75,
"outputs": [
{
"data": {
"text/plain": "[0, 10, 200, 30, 40, 50, 50]"
},
"execution_count": 75,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "[5, 7, 9] + [3, 4, 9]",
"execution_count": 76,
"outputs": [
{
"data": {
"text/plain": "[5, 7, 9, 3, 4, 9]"
},
"execution_count": 76,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "# concatenation",
"execution_count": 80,
"outputs": []
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "# Slack Link: http://bit.ly/2BXZr5i\n# [email protected]\n# http://python.math-hse.info",
"execution_count": 81,
"outputs": []
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "type([1, 2])",
"execution_count": 82,
"outputs": [
{
"data": {
"text/plain": "list"
},
"execution_count": 82,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "list(\"Hello\")",
"execution_count": 83,
"outputs": [
{
"data": {
"text/plain": "['H', 'e', 'l', 'l', 'o']"
},
"execution_count": 83,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "my_list = [1, 2]",
"execution_count": 84,
"outputs": []
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "my_list.append(100)",
"execution_count": 85,
"outputs": []
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "my_list",
"execution_count": 86,
"outputs": [
{
"data": {
"text/plain": "[1, 2, 100]"
},
"execution_count": 86,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "s = \"Hello\"",
"execution_count": 87,
"outputs": []
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "s[0]",
"execution_count": 88,
"outputs": [
{
"data": {
"text/plain": "'H'"
},
"execution_count": 88,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "s[1:3]",
"execution_count": 89,
"outputs": [
{
"data": {
"text/plain": "'el'"
},
"execution_count": 89,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "s = s.replace(\"el\", \"EELL\")",
"execution_count": 92,
"outputs": []
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "s",
"execution_count": 93,
"outputs": [
{
"data": {
"text/plain": "'HEELLlo'"
},
"execution_count": 93,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "s = input()\ns.replace(\"a\", \"b\")\nprint(s)",
"execution_count": 94,
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": "aaawwweee\naaawwweee\n"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "s = input()\ns = s.replace(\"a\", \"b\")\nprint(s)",
"execution_count": 97,
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": "hkhaassf\nhkhbbssf\n"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "s = \"Hello, world! \\n This is a test\"",
"execution_count": 107,
"outputs": []
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "words = s.split()",
"execution_count": 108,
"outputs": []
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "words",
"execution_count": 109,
"outputs": [
{
"data": {
"text/plain": "['Hello,', 'world!', 'This', 'is', 'a', 'test']"
},
"execution_count": 109,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "s.split(\",\")",
"execution_count": 110,
"outputs": [
{
"data": {
"text/plain": "['Hello', ' world! \\n This is a test']"
},
"execution_count": 110,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "print(s)",
"execution_count": 111,
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": "Hello, world! \n This is a test\n"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "words = [\"a\", \"bb\", \"ccdd\"]\nsentence = \"---\".join(words)",
"execution_count": 119,
"outputs": []
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "print(sentence)",
"execution_count": 120,
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": "a---bb---ccdd\n"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "words",
"execution_count": 121,
"outputs": [
{
"data": {
"text/plain": "['a', 'bb', 'ccdd']"
},
"execution_count": 121,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "for element in words: \n print(element)\n print(\"Next one\")\nprint(\"That's all\")",
"execution_count": 122,
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": "a\nNext one\nbb\nNext one\nccdd\nNext one\nThat's all\n"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "element",
"execution_count": 123,
"outputs": [
{
"data": {
"text/plain": "'ccdd'"
},
"execution_count": 123,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "for i in range(4):\n print(i)",
"execution_count": 124,
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": "0\n1\n2\n3\n"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "for i in range(1, 4):\n print(i)",
"execution_count": 125,
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": "1\n2\n3\n"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "for i in range(1, 9, 3):\n print(i)",
"execution_count": 128,
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": "1\n4\n7\n"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "words",
"execution_count": 129,
"outputs": [
{
"data": {
"text/plain": "['a', 'bb', 'ccdd']"
},
"execution_count": 129,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "for i in range(len(words)):\n print(words[i])",
"execution_count": 130,
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": "a\nbb\nccdd\n"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "for word in words:\n print(word)",
"execution_count": 131,
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": "a\nbb\nccdd\n"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "numbers = [1, 5, 12, 6, 8]\n# задача: посчитать сумму этих чисел\nsumma = 0\nfor number in numbers:\n summa = summa + number\n # summa += number\nprint(summa)",
"execution_count": 134,
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": "32\n"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "summa = 10",
"execution_count": 138,
"outputs": []
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "del sum",
"execution_count": 140,
"outputs": []
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "sum(numbers)",
"execution_count": 141,
"outputs": [
{
"data": {
"text/plain": "32"
},
"execution_count": 141,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "import math",
"execution_count": 135,
"outputs": []
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "x = 7\nif x > 0:\n print(\"positive\")\nelse:\n print(\"not positive\")\nprint(\"Go ahead\")",
"execution_count": 146,
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": "positive\nGo ahead\n"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "x > 0",
"execution_count": 147,
"outputs": [
{
"data": {
"text/plain": "True"
},
"execution_count": 147,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "x < 0",
"execution_count": 148,
"outputs": [
{
"data": {
"text/plain": "False"
},
"execution_count": 148,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "6 == 7",
"execution_count": 149,
"outputs": [
{
"data": {
"text/plain": "False"
},
"execution_count": 149,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "7 == 7",
"execution_count": 150,
"outputs": [
{
"data": {
"text/plain": "True"
},
"execution_count": 150,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "6 = 7",
"execution_count": 151,
"outputs": [
{
"ename": "SyntaxError",
"evalue": "can't assign to literal (<ipython-input-151-adcc79807a81>, line 1)",
"output_type": "error",
"traceback": [
"\u001b[0;36m File \u001b[0;32m\"<ipython-input-151-adcc79807a81>\"\u001b[0;36m, line \u001b[0;32m1\u001b[0m\n\u001b[0;31m 6 = 7\u001b[0m\n\u001b[0m ^\u001b[0m\n\u001b[0;31mSyntaxError\u001b[0m\u001b[0;31m:\u001b[0m can't assign to literal\n"
]
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "isinstance(6, str)",
"execution_count": 152,
"outputs": [
{
"data": {
"text/plain": "False"
},
"execution_count": 152,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "isinstance(\"hello\", str)",
"execution_count": 153,
"outputs": [
{
"data": {
"text/plain": "True"
},
"execution_count": 153,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "7 != 8\n# not equal",
"execution_count": 156,
"outputs": [
{
"data": {
"text/plain": "True"
},
"execution_count": 156,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "7 <> 9",
"execution_count": 155,
"outputs": [
{
"ename": "SyntaxError",
"evalue": "invalid syntax (<ipython-input-155-fe57a88c3312>, line 1)",
"output_type": "error",
"traceback": [
"\u001b[0;36m File \u001b[0;32m\"<ipython-input-155-fe57a88c3312>\"\u001b[0;36m, line \u001b[0;32m1\u001b[0m\n\u001b[0;31m 7 <> 9\u001b[0m\n\u001b[0m ^\u001b[0m\n\u001b[0;31mSyntaxError\u001b[0m\u001b[0;31m:\u001b[0m invalid syntax\n"
]
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "x = -6\nif x > 0:\n print(\"positive\")\nelif x < 0:\n print(\"negative\")\nelse:\n print(\"zero\")\nprint(\"Go ahead\")",
"execution_count": 158,
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": "negative\nGo ahead\n"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "x = -6\nif x > 0:\n print(\"positive\")\nprint(\"Go ahead\")",
"execution_count": 160,
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": "Go ahead\n"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "x = -9\nif x > 0 and x % 2 == 0:\n print(\"x is positive and even\")\nelif x < 0 and x % 2 == 1:\n print(\"x is negative and odd\")",
"execution_count": 163,
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": "x is negative and odd\n"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "True and True",
"execution_count": 164,
"outputs": [
{
"data": {
"text/plain": "True"
},
"execution_count": 164,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "True and False",
"execution_count": 165,
"outputs": [
{
"data": {
"text/plain": "False"
},
"execution_count": 165,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "True or False",
"execution_count": 166,
"outputs": [
{
"data": {
"text/plain": "True"
},
"execution_count": 166,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "True or True",
"execution_count": 167,
"outputs": [
{
"data": {
"text/plain": "True"
},
"execution_count": 167,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "not True",
"execution_count": 168,
"outputs": [
{
"data": {
"text/plain": "False"
},
"execution_count": 168,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "to_be = False\nto_be or not to_be",
"execution_count": 170,
"outputs": [
{
"data": {
"text/plain": "True"
},
"execution_count": 170,
"metadata": {},
"output_type": "execute_result"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "x = 1\nwhile x < 10:\n x = x * 2\n if x > 5:\n break\n print(x)\nprint(\"That's all\")",
"execution_count": 174,
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": "2\n4\nThat's all\n"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "x = 0\nwhile True:\n x = x + 1\n print(x)\n if x > 10:\n break\n print(\"Next one\")",
"execution_count": 176,
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": "1\nNext one\n2\nNext one\n3\nNext one\n4\nNext one\n5\nNext one\n6\nNext one\n7\nNext one\n8\nNext one\n9\nNext one\n10\nNext one\n11\n"
}
]
},
{
"metadata": {
"trusted": true
},
"cell_type": "code",
"source": "",
"execution_count": null,
"outputs": []
}
],
"metadata": {
"kernelspec": {
"name": "python3",
"display_name": "Python 3",
"language": "python"
},
"language_info": {
"name": "python",
"version": "3.6.1",
"mimetype": "text/x-python",
"codemirror_mode": {
"name": "ipython",
"version": 3
},
"pygments_lexer": "ipython3",
"nbconvert_exporter": "python",
"file_extension": ".py"
},
"gist": {
"id": "",
"data": {
"description": "Python ICEF 2018, Lecture 1",
"public": true
}
}
},
"nbformat": 4,
"nbformat_minor": 2
}
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