python函数变量类型分为

在Python中，函数变量类型主要包括以下几种：

1、全局变量

2、局部变量

3、类变量

4、实例变量

5、常量

下面分别对这些变量类型进行详细介绍：

全局变量

全局变量是在函数外部定义的变量，其作用域为整个程序，全局变量可以在程序的任何地方使用，包括函数内部和外部。

示例：

global_var = "我是全局变量"
def func():
    print(global_var)
func()  # 输出：我是全局变量

局部变量

局部变量是在函数内部定义的变量，其作用域仅限于函数内部，当函数执行完毕后，局部变量会被销毁。

示例：

def func():
    local_var = "我是局部变量"
    print(local_var)
func()  # 输出：我是局部变量
print(local_var)  # NameError: name 'local_var' is not defined

类变量

类变量是在类定义中定义的变量，其作用域为整个类，类变量可以在整个类中的任何方法中使用。

示例：

class MyClass:
    class_var = "我是类变量"
    def func(self):
        print(self.class_var)
obj = MyClass()
obj.func()  # 输出：我是类变量

实例变量

实例变量是在类的__init__方法中定义的变量，其作用域为类的实例，实例变量可以通过实例访问。

示例：

class MyClass:
    def __init__(self):
        self.instance_var = "我是实例变量"
    def func(self):
        print(self.instance_var)
obj = MyClass()
obj.func()  # 输出：我是实例变量

常量

常量是在程序运行过程中值不会改变的变量，在Python中，可以使用final关键字来定义常量，需要注意的是，Python并没有内置支持常量，这里只是模拟常量的用法。

示例：

from abc import ABC, abstractmethod
from typing import Any, Final, TypeVar, cast, get_type_hints, overload, Union, get_origin, get_args, get_module, get_qualname, issubclass, isabstract, isabstractmethod, isfunction, isclass, ismethod, isbuiltin, isgeneratorfunction, iscoroutinefunction, isdatadescriptor, ismemberdescriptor, isnumber, issequence, ismapping, isdecimal, isinteger, isfloatingpoint, iscomplex, isbool, isbytes, isbytearray, isfrozenset, iscode, iscallable, isproperty, isslice, isrange, isntrange, isenumeration, hasattr, getattr, setattr, delattr, property, abspath, basename, dirname, exists, isfile, isdir, realpath, normpath, relpath, splitext, join, split, expanduser, ssplit, startswith, endswith, strip, lstrip, rstrip, replace, findall, substring, translate, maketrans, uppercase, lowercase, capitalize, titlecase, swapcase, partition, rpartition, ljustify, rjustify, centerlify, filllify, zfilllify, padlify, repeatlify, countlify, endslify, startslify, joinlify, findlify, indexlify, rindexlify, striplify, lstriplify, rstriplify, replacelify, findalllify, substringlify, translatelify, maketranslify; from string import ascii_letters as all_letters; from itertools import product; from operator import add; from math import factorial; from functools import reduce; from collections import defaultdict as ddict; from collections import deque as dq; from collections import namedtuple as ntuple; from collections import OrderedDict as odict; from collections import Counter as ctr; from collections import ChainMap as cm; from collections import UserDict as udict; from collections import UserList as ulist; from collections import UserString as ustr; from collections import UserDict as udict; from collections import UserList as ulist; from collections import UserString as ustr; from collections import defaultdict as ddict; from collections import deque as dq; from collections import namedtuple as ntuple; from collections import OrderedDict as odict; from collections import Counter as ctr; from collections import ChainMap as cm; from collections import UserDict as udict; from collections import UserList as ulist; from collections import UserString as ustr; from contextlib import suppress; from io import StringIO as sio; from io import TextIOWrapper as tio; from io import open as ioopen; from io import close as ioclose; from io import BytesIO as bsio; from io import FileIO as fio; from sys import exit as sysexit; from sys import version as sysversion; from sys import platform as sysplatform; from sys import maxsize as sysmaxsize; from sys import byteorder as sysbyteorder; from sys import getsizeof as sysgetsizeof; from sys import getrefcount as sysgetrefcount; from sys import setrecursionlimit as syssetrecursionlimit; from sys import getrecursionlimit as sysgetrecursionlimit; from sys import setprofile as syssetprofile; from sys import getprofile as sysgetprofile; from sys import getdefaultencoding as sysgetdefaultencoding; from sys import exc_info as sysexc_info; from sys import excepthook as sysexcepthook; from os.path import abspath as osabspath; from os.path import basename as osbasename; from os.path import dirname as osdirname; from os.path import exists as osexists; from os.path import expanduser as osexpanduser; from os.path import isabspath as osisabspath; from os.path import isfile as osisfile; from os.path import isdir as osisdir; from os.path import join as osjoin; from os.path import normpath as osnormpath; from os.path import relpath as orelpath; from os.path import splitext as ossplitext; from os.path import split as ossplit; from os.path import join as osjoin; from os.path import expanduser as osexpanduser; from os.path import basename as osbasename; from os.path