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...
intern(string) 在“interned”字符串的表格中输入字符串并返回字符串 - 字符串本身或副本。实习字符串对于在字典查找中获得一些性能很有用 - 如果字典中的密钥被实施并且查找密钥被实施,则可以通过指针比较而不是字符串比较来完成关键比较(哈希后)。通常情况下,Python程序中使用的名称会自动实现,并且用于保存模块,类...
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() ...
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 ...
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() ...
Executable Object Statements and Built-in FunctionsBuilt-in Function or Statement Descriptioncallable(obj)Returns true if obj is callable and False otherwisecompile(string, file, type)Creates a code object from string of type type; fileis where the code originates from (usually set to "")e Read...
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。
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...
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 ascii()Returns a readable version of an object. Replaces none...
str,转换为字符串类型,string; >>>str(123)'123' complex,转换为复数类型; >>>complex(3,2)(3+2j) ord,转换为字符对应的数值; >>>ord('a')97 chr,转换为字符对应的数值; >>>chr(97)'a' unichr,转换为数值对应的unicode字符; >>>unichr(97)u'a' ...