python中所有字符串操作 , )))), ))))#返回50个长度的字符串,不够左边就以0补充,可以用在十六进制补位(不常用)运行结果: My name is qinjiaxi---------------my name is qinjiaxi---------------2Truemy name is qinjiaxi4namemy name is qinjiaxi and i am 28 oldmy name is qinjiax and i am 28 oldFalseFalseFal…