在python中，将数字、特殊字符和+或-号与字符串分开

import re

def separate_string(string):
    pattern = r'([-+*/])|(\d+)|(\W)'
    result = re.findall(pattern, string)
    separated_string = []
    for match in result:
        separated_string.extend([group for group in match if group])
    return separated_string

string = "3+4-2*5/2"
separated_string = separate_string(string)
print(separated_string)

['3', '+', '4', '-', '2', '*', '5', '/', '2']

def separate_string(string):
    separated_string = []
    num = ''
    for char in string:
        if char.isdigit():
            num += char
        elif char in '+-*/':
            if num:
                separated_string.append(num)
                num = ''
            separated_string.append(char)
        else:
            if num:
                separated_string.append(num)
                num = ''
            separated_string.append(char)
    if num:
        separated_string.append(num)
    return separated_string

string = "3+4-2*5/2"
separated_string = separate_string(string)
print(separated_string)

['3', '+', '4', '-', '2', '*', '5', '/', '2']