python函数中文手册.pdf

内置函数 一， 文档说明 原始文档来自于 python v2.7.2 中文译文和用法尚不完全，您可以自由修改和完善， 您可以在文档结尾鸣谢添上您的名字，我们将会感谢您做的 贡献！ 二，函数列表 1, 取绝对值 abs(x) Return the absolute value of a number. The argument may be a plain or long integer or a floating point number. If the argument is a complex number, its magnitude is returned. 如果你不知道绝对值什么意思，那就要补一下小学数学了！ 基本用法 2 ， all( iterable ) Return True if all elements of the iterable are true (or if the iterable is empty). Equivalent to: 3. any( iterable ) Return True if any element of the iterable is true. If the iterable is empty, return False. Equivalent to: 4. basestring() This abstract type is the superclass for str and unicode . It cannot be called or instantiated, but it can be used to test whether an object is an instance of str or unicode . isinstance(obj, basestring) is equivalent to isinstance(obj, (str, unicode)). 是字符串和字符编码的超类， 是抽象类型。 不能被调用或者实例化。 可以用来判断实例是否为字符串 或者字符编码。 方法： 5 ．二进制转换 bin( x) Convert an integer number to a binary string. The result is a valid Python expression. If x is not a Python int object, it has to define an __index__() method that returns an integer. 转换成二进制表达 方法： 6. 布尔类型 bool([ x]) Convert a value to a Boolean, using the standard truth testing procedure. If x is false or omitted, this returns False ; otherwise it returns True . bool is also a class, which is a subclass of int . Class bool cannot be subclassed further. Its only instances are False and True 布尔类型的转化 用法： 7. 二进制数组的转化 bytearray([ source [, encoding [, errors ]]]) Return a new array of bytes. The bytearray type is a mutable sequence of integers in the range 0 = x 256. It has most of the usual methods of mutable sequences, described in Mutable Sequence Types , as well as most methods that the str type has, see String Methods