EdisonChendi

# coding=UTF-8

def lost_exception():
    while True:
        try:
            print("hello world")
            raise IndexError("rrr")
        except NameError as e:
            print 'NameError happened'
            print e

EdisonChendi

# coding=UTF-8

# for...else...
def printPrime1(n):
    for i in xrange(2, n):
        found = False
        for j in xrange(2, i):
            if i % j == 0:
                found = True
                break

EdisonChendi

# coding=UTF-8

i = 1
++i # <==> +(+i), no ++ operator in Python
assert i == 2 # AssertionError

EdisonChendi

# coding=UTF-8

a = "s"
b = "s"
print(id(a)) # python use string interning for short strings
print(id(b))
assert a is b
assert a == b

c = "x" * 100

EdisonChendi

# coding=utf-8

# py2
from __future__ import division
import types

# prefer isinstance to type
assert isinstance(10/2, types.FloatType)

EdisonChendi

# coding:utf-8

class _Const(object):

    class ConstantError(TypeError): pass

    def __setattr__(self, name, value):
        if self.__dict__.has_key(name):
            raise self.ConstantErrorr("can't change const value '%s'." % name)
        if not name.isupper():

EdisonChendi

# coding=utf-8

from itertools import islice

def fib():
    a, b = 0, 1
    while True:
        yield a # lazy evaluation
        a, b = b, a+b

EdisonChendi

# coding=utf-8

def trunc(s, limit, coding="UTF-8", postfix="..."):
    '''
    sensibly trunc a str/bytes(py3) or str/unicode string(py2) to some limit by counting bytes
    '''
    unicode_s = s.decode(coding) if type(s) == bytes else s
    nums = (len(u.encode(coding)) for u in unicode_s)
    sum, i = 0, 0
    use_postfix = ""

EdisonChendi

# coding=utf-8

def trunc(s, limit, coding="UTF-8", postfix="..."):
    '''
    works both on python2 and python3
    '''
    unicode_s = s.decode(coding) if type(s) == bytes else s
    nums = (len(u.encode(coding)) for u in unicode_s)
    sum, i = 0, 0
    use_postfix = ""

EdisonChendi

# coding=utf-8

def trunc(s, limit, coding="UTF-8", postfix="..."):
    '''
    works both on python2 and python3
    '''
    unicode_s = s.decode(coding) if type(s) == bytes else s
    nums = (len(u.encode(coding)) for u in unicode_s)
    sum, i = 0, 0
    use_postfix = ""