dketov

# -*- encoding: utf-8 -*-
"""
Определение функции
"""

def square(x):
    'Calculates the square of the number x.'
    return x*x

print square(100)

dketov

# -*- encoding: utf-8 -*-
"""
Деление на ноль
"""

try: 1/0
except ZeroDivisionError: 
   print "caught divide-by-0 attempt" 

dketov

# -*- encoding: utf-8 -*-
"""
Базовый синтаксис
"""

try:
    num = float(raw_input("\nEnter a number: "))
except(ValueError):
    print "That was not a number!" 
else:

dketov

# -*- encoding: utf-8 -*-
"""
Итерация по списку
"""

words = ['A', 'B', 'C', 'D', 'E']
for word in words:
    print word

dketov

# -*- encoding: utf-8 -*-
"""
Базовый синтаксис
"""

x = 1
while x <= 100:
    print x
    x += 1

dketov

# -*- encoding: utf-8 -*-
"""
Базовый синтаксис
"""

x = int(raw_input("Please enter an integer: "))
if x < 0:
      x = 0
      print 'Negative changed to zero'
elif x == 0:

dketov

# -*- encoding: utf-8 -*-
"""
Логическое И
"""

print 'a' and 'b'

print '' and 'b' 

print 'a' and 'b' and 'c'

dketov

# -*- encoding: utf-8 -*-
"""
Динамическая типизация
"""

x = 0            # x bound to an integer object
print x

x = "Hello"      # now it's a string
print x

dketov

# -*- encoding: utf-8 -*-
"""
Приоритет операторов
"""

#--+--------------------+------------------------
#  | Operator           |  Description
#--+--------------------+------------------------
#   lambda              | Lambda Expression
#   or                  | Boolean OR

dketov

# -*- encoding: utf-8 -*-
"""
Открытие файла
"""

#open() returns a file object, and is most commonly used with two arguments: 
#"open(filename, mode)".

f=open('/tmp/workfile', 'w')
print f