摘要：
name1 = 'Michael' name2 = 'Bob' classmates = ['Michael','Bob','Tracy',12] classmates.append('Rose') classmates.insert(1,'Jack') classmates.pop() classmates.pop(4) classmates[0] = 'Rose' print(len(cl... 阅读全文
摘要：
fr = open('plainText.txt',mode='r',encoding='utf-8') plainText = fr.read() print('明文：'+plainText) print('密文：',end='') fw = open('cipherText.txt',mode='a',encoding='utf-8') for c in plainText : ... 阅读全文