basestring() 不可直接调用的isinstance(obj,basestring)is equivalent toisinstance(obj,(str,unicode)). bin()Convert an integer number to a binary string(将整型转化为二进制字符) bool() 返回布尔值True or False bytearray callable()ReturnTrueif theobjectargument appears callable chr(i)Return a string ...
>>> import struct >>> dir() # show the names in the module namespace ['__builtins__', '__doc__', '__name__', 'struct'] >>> dir(struct) # show the names in the struct module ['Struct', '__builtins__', '__doc__', '__file__', '__name__', '__package__', ...
The argument may be a sequence (string, tuple or list) or a mapping (dictionary). print()输出 type(X)返回X的数据类型 open(f)打开一个文件f并返回文件类型的对象,和file()相似。 在python2.7.2 doc中可以查到每个函数的详细用法:function Built-in Functions abs() divmod() input() open() ...
以Python 3.60 版本为例,一共存在 68 个这样的函数,它们被统称为 内建函数(Built-in Functions)。 之所以被称为内建函数,并不是因为还有“外建函数”这个概念,“内建”的意思是在 Python 3.60 版本安装完成后,你无须创建就可以直接使用这些函数,即 表示这些函数是“自带”的而已。 Python 3.60 的 68个 内建...
简介:Python编程:Built-in Functions内建函数小结 Built-in Functions(68个) 1、数学方法 abs() sum() pow() min() max() divmod() round() 2、进制转换 bin() oct() hex() 3、简单数据类型 - 整数:int() - 浮点数:float() - 字符\字符串:str() repr() ascii() ord() chr() format() ...
python不能滥用eval python built-in functions 笔记-python-built-in functions-eval,exec,compile 1. python代码执行函数 有时需要动态改变代码,也就是说代码需要是字符串格式,然后在按需要编译,这时,需要一些执行代码的函数,js中的是eval(),python中也有类似内置函数。
STRING FUNCTIONS IN PYTHON WITH EXAMPLES This tutorial outlines various string (character) functions used in Python. To manipulate strings and character values, python has several in-built functions. It means you don't need to import or have dependency on any external package to deal with string...
PythonBuilt in Functions Python has a set of built-in functions. FunctionDescription abs()Returns the absolute value of a number all()Returns True if all items in an iterable object are true any()Returns True if any item in an iterable object is true ...
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. 将整形转换为一个二进制字符串,如果该数值不是整形,那么它必须有个内置__index()__函数返回一个整数。
>>> callable('bar') # string False >>> class C(object): pass ... >>> callable(C) # class True Section 14.3. Executable Object Statements and Built-in Functions 14.3.2. compile() compile() is a function that allows the programmer to generate a code object on the fly, that is, ...