摘要：class StudentDoc: def __init__(self, number, name, major, python): self._number = number self._name = name self._major = major self._python = python d 阅读全文

摘要：you with open('D:\\data6_1.txt','r',encoding='utf-8') as f: t=[] for line in f.readlines(): m=line.strip().split() t.append(m) t.sort(key=lambda l:l[2 阅读全文