Python学习笔记(9):输入/输出
通常,一个程序都会有输入/输出,这样可以与用户进行交互。用户输入一些信息,你会对他输入的内容进行一些适当的操作,然后再输出给用户想要的结果。Python的输入/输出,我们可以用input进行输入,print进行输出,这些都是简单的控制台输入/输出,复杂的有处理文件等。
1. input和print
name = input("Please input your name:\n") print("Hello,", name)
运行结果:
Please input your name:
known
Hello, known
2. 处理文件
poem = '''\ Programming is fun When the work is done if you wanna make your work also fun: use Python! ''' f = open('poem.txt', 'w') #open for 'w'riting f.write(poem) #write text to file f.close() #close the file f = open('poem.txt') #if no mode is specified, 'r'ead mode is assumed by default while True: line = f.readline() if len(line) == 0:#Zero length indicates EOF break print(line), #Notice comma to avoid automatic newline added by Python f.close()#close the file
运行结果:
Programming is fun
When the work is done
if you wanna make your work also fun:
use Python!
open一个文件模式可以为读模式('r')、写模式('w')或追加模式('a'),还有其他模式,你可以用help(open)来查看。