string转int，使用这些技巧轻松搞定

使用int()函数将字符串转换为整数

str_number = "123"int_number = int(str_number)print(int_number)

使用float()函数将字符串转换为浮点数

str_number = "123.45"float_number = float(str_number)print(float_number)

使用算术运算符将字符串转换为整数

str_number = "123"int_number = 0for char in str_number:    int_number = int_number * 10 + int(char)print(int_number)

使用正则表达式提取数字并转换为整数

import restr_number = "123abc"int_number = int(re.search(r'\d+', str_number).group())print(int_number)