题解 | 把字符串转换成整数(atoi)

from re import error
#
# 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
#
# 
# @param s string字符串 
# @return int整型
#
class Solution:
    def StrToInt(self , s: str) -> int:
        # write code here
        s=s.strip()
        print(s)
        num=""
        for index,ss in enumerate(s):
            if (ss.isdigit()):
                num=num+ss  
            elif((ss=='+' or ss=='-') and num=="" and index==0):
                num=num+ss
            else:
                break
        try:
            numint=int(num)
            if(numint>2**31-1):
                print("123")
                numint=2**31-1
            elif(numint<-(2**31)):
                numint=-(2**31)
            return numint

        except Exception:
            return 0