Summarize some functions in python

零下一度
Release: 2017-06-25 10:16:53
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Function parameters in python include: default parameters, keyword parameters, non-keyword variable-length parameters (tuple), keyword variable-length parameters (dictionary)

:在函数声明时,指定形参的默认值,调用时可不传入改参数(使用默认值)
def foo(x):  ##默认参数
  print 'x is %s' % x
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y默认为20
def foo( x,y=20): ##关键字参数
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*z接收一个元组
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<em><em><em>  for myz in<strong> z</strong>:<br><em>    print 'z: ', myz</em></em></em></em>
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关键字可变长参数(字典):**w接收的是一个字典
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def foo(x,y=20,*z,**w):  ##默认参数
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  for wArg in w.keys():
        print 'wArg %s: %s' % (wArg, str(w[wArg]))
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<br><br><br><br><br><br>
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