十八、copyright方法、credits方法
此二种方法不做多解释, 直接上例子:
>>> credits Thanks to CWI, CNRI, BeOpen.com, Zope Corporation and a cast of thousands for supporting Python development. See www.python.org for more information.
>>> copyright Copyright (c) 2001-2014 Python Software Foundation. All Rights Reserved. Copyright (c) 2000 BeOpen.com. All Rights Reserved. Copyright (c) 1995-2001 Corporation for National Research Initiatives. All Rights Reserved. Copyright (c) 1991-1995 Stichting Mathematisch Centrum, Amsterdam. All Rights Reserved.
十九、delattr方法
1、定义:
delattr(...) delattr(object, name) Delete a named attribute on an object; delattr(x, 'y') is equivalent to ``del x.y''.
2、解释:删除一个对象已定义的属性,相当于 del object.name
3、举例:
>>> dir(datetime) ['MAXYEAR', 'MINYEAR', '__doc__', '__name__', '__package__', 'date', 'datetime', 'datetime_CAPI', 'time', 'timedelta', 'tzinfo'] >>> delattr(datetime, 'time') >>> dir(datetime) ['MAXYEAR', 'MINYEAR', '__doc__', '__name__', '__package__', 'date', 'datetime', 'datetime_CAPI', 'timedelta', 'tzinfo']
二十、dict类
1、定义:
class dict(object) | dict() -> new empty dictionary | dict(mapping) -> new dictionary initialized from a mapping object's | (key, value) pairs | dict(iterable) -> new dictionary initialized as if via: | d = {} | for k, v in iterable: | d[k] = v | dict(**kwargs) -> new dictionary initialized with the name=value pairs | in the keyword argument list. For example: dict(one=1, two=2)
2、解释:用于生成一个新字典,生成方式见举例。
3、举例:
>>> dict() {} >>> dict([('a',4),('b',5)]) {'a': 4, 'b': 5} >>> dict(a='4',b=5) {'a': '4', 'b': 5}
二十一、dir方法
此方法前面的博客中已介绍过, 可点击http://www.aoyanming.com/blog/display/6查看
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