python 简谈3

#1.input用法a_input=input()print('hello',a_input)#shift+tab函数描述#shift+函数注释####2.文件读取text='write'print(text)my_file=open('file1.txt','w')#以写入的方式打开文件my_file.write(text)my_file.close()with open('file2.txt','w') as f2:#清空文件，然后写入        f2.write(text)with open('file2.txt','a') as f2:#追加内容    f2.write(text)with open('file2.txt','r') as f2:#追加内容    content=f2.read()    #content=f2.readline()读取一行内容    #content=f2.readlines()读取所有行内容存储到一个列表中    print(content)#有空行filename='file2.txt'with open(filename) as f:    for line in f:        print(line)#无空行