age = 20 if age >= 18: print 'your age is', age print 'adult'
age = 3 if age >= 18: print 'your age is', age print 'adult' else: print 'your age is', age print 'teenager'
age = 3 if age >= 18: print 'adult' elif age >= 6: print 'teenager' else: print 'kid'
if <条件判断1>: <执行1> elif <条件判断2>: <执行2> elif <条件判断3>: <执行3> else: <执行4>
age = 20 if age >= 6: print 'teenager' elif age >= 18: print 'adult' else: print 'kid'
if x: print 'True'
names = ['Michael', 'Bob', 'Tracy'] for name in names: print name
Michael Bob Tracy
sum = 0 for x in [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]: sum = sum + x print sum
>>> range(5) [0, 1, 2, 3, 4]
sum = 0 for x in range(101): sum = sum + x print sum
sum = 0 n = 99 while n > 0: sum = sum + n n = n - 2 print sum
birth = raw_input('birth: ')
if birth < 2000:
print '00前'
else:
print '00后'
>>> birth '1982' >>> '1982' < 2000 False >>> 1982 < 2000 True
birth = int(raw_input('birth: '))
Traceback (most recent call last): ... ValueError: invalid literal for int() with base 10: 'abc'
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