python 关键字和位置参数

11.2.2 关键字参数


标准调用:

def foo(x):
    print x
a=foo('abcefg')
print a

C:\Python27\python.exe C:/Users/TLCB/PycharmProjects/untitled/mycompany/eee/a2.py
123456
None

关键字调用


def foo(x='a',y='b'):
    print x
    print y
a=foo(23,43)
print a

C:\Python27\python.exe C:/Users/TLCB/PycharmProjects/untitled/mycompany/eee/a2.py
23
43
None