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python冒号和逗号的用法

注意ifwhilefor等(或函数定义)语句在结尾处包含一个冒号——我们通过它告诉Python下面跟着一个语句块。
————–冒号的用法

 if guess == number:     print ‘Congratulations, you guessed it.’ # New block starts here     print “(but you do not win any prizes!)” # New block ends here elif guess:     print ‘No, it is a little higher than that’ # Another block # You can do whatever you want in a block … else:     print ‘No, it is a little lower than that’

if guess == number:

print ‘Congratulations, you guessed it.’ # New block starts here

print “(but you do not win any prizes!)” # New block ends here

elif guess:

print ‘No, it is a little higher than that’ # Another block

# You can do whatever you want in a block …

else:

print ‘No, it is a little lower than that’

————-

 def printMax(x, y): ”’输出最大的2个数. 2个数值必需是整数.”’ x = int(x) # convert to integers, if possible     y = int(y) if x &gt; y:     print x, ‘is maximum’ else:     print y, ‘is maximum’

def printMax(x, y):

”‘输出最大的2个数.

2个数值必需是整数.’”

x = int(x) # convert to integers,

if possible

y = int(y)

if x > y:

print x, ‘is maximum’

else:

print y, ‘is maximum’

========逗号的特殊用途

 for item in shoplist: print item,

1 2	for item in shoplist: print item,

我们在print语句的结尾使用了一个逗号来消除每个print语句自动打印的换行符。这样做有点难看，不过确实简单有效。
[via@babiwu]

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