文件操作
fr =open('plainText.txt',mode='r',encoding='utf-8') plainText=fr.read() print('明文:'+plainText) print('密文:',end='') fw =open('dearText.txt',mode='a',encoding='utf-8') for c in plainText: print(chr(ord(c)+2),end='') fw.write(chr(ord(c)+2))
cars=['Jaguar','Benz','Lamborghini','Bugatti'] cars.append('Maserati') cars.pop() print(cars)
cars=['Jaguar','Benz','Lamborghini','Bugatti'] cars.append('Maserati') print(len(cars))
cars=['Jaguar','Benz','Lamborghini','Bugatti'] cars.append('Maserati') cars[1]='Jaguar' print(cars[1])