即实现(str=>int)函数转变,如传入str='12345',返回int12345
def str2int(string): num=0 for s in string: diwei=ord(s)-ord('0')#ord(s)-48 num=num*10+diwei return num n=str2int('12345') print(n) print(type(n))结果:12345
<class 'int'>
即实现(str=>int)函数转变,如传入str='12345',返回int12345
def str2int(string): num=0 for s in string: diwei=ord(s)-ord('0')#ord(s)-48 num=num*10+diwei return num n=str2int('12345') print(n) print(type(n))结果:12345