Python9-8

class A:
    def __init__(self, value):
        if isinstance(value, int):
            #整型构造函数
        else ifinstance(value, str):
            #字符串构造函数
        else:
            #其他构造函数........

可以用 *arg 和 **kwd 传入任意参数，不过函数里面要做处理就是啦可以用 *arg 和 **kwd 传入任意参数，不过函数里面要做处理就是啦

subprocess.call?
Type:       function
String Form:<function call at 0xb6e036bc>
File:       /usr/lib/python2.7/subprocess.py
Definition: subprocess.call(*popenargs, **kwargs)
Docstring:
Run command with arguments.  Wait for command to complete, then
return the returncode attribute.

The arguments are the same as for the Popen constructor.  Example:

retcode = call(["ls", "-l"])