05 2022 档案

摘要：def is_valid(x): if len(x)!=18: return False for i in x: if not (i.isdigit() or i=='X'): return False else: return True with open('data3_id.txt','r',e 阅读全文

摘要：with open('data3.txt','r',encoding='utf-8') as f : with open('data3_processed.txt', 'w', encoding='utf-8') as f1: data=f.read().strip().split('\n') da 阅读全文

摘要：实验一：print(sum) sum = 42 print(sum) def inc(n): sum = n+1 print(sum) return sum sum = inc(7) + inc(7) print(sum) 问题：1.内置函数2.全局变量3.局部变量4.全局变量 实验二: def f 阅读全文