python note 08 文件操作

1、相对路径与绝对路径比较

#绝对路径

f = open('d:\pzw.txt',mode='r',encoding='UTF-8')
content = f.read()
print(content)
f.close()

#相对路径

f = open('pzw',mode='r',encoding='utf-8')
content = f.read()
print(content)
f.close()

2、

#对于r就是只读

f = open('pzw',mode='rb',)
content = f.read()
print(content)
f.close()

#对于w没有文件会创建文件，有文件会将源文件的内容全部清除再写

f = open('log',mode='w',encoding='utf-8')
f.write('123456')
f.close()

f = open('log',mode='wb')
f.write('123456'.encode('utf-8'))
f.close()

f = open('log',mode='w+',encoding='utf-8')
f.write('aaa')
print(f.read())
f.close()

#对于a为追加功能

f = open('log',mode='a',encoding='utf-8')
f.write('666')
f.close()

f = open('log',mode='ab')
f.write('666'.encode('utf-8'))
f.close()

f = open('log',mode='a+',encoding='utf-8')
f.write('666')
f.seek(0)
print(f.read())
f.close()