python--file read/write

Source: Internet
Author: User

f = open (' xx ', ' A + ', encoding= ' utf-8 ')


R r+

W w+

A +
# Read R #如果打开的文件的时候没有指定模式, then default is read
# Read and write mode r+, as long as the R, the file does not exist, open will error
# Write W w mode will empty the original file contents
# read-write mode w+
#只要沾上w, the contents of the file will be emptied.
#追加 A
# Append read/write (0) #seek移动指针的时候, only to read so, not to write well

F.truncate () #清空文件内容 () #读取文件里面所有的内容, returns a string
F.readline () #只读一行的内容, the returned string
F.readlines () #读取文件里面所有的内容, the return is a list
F.write (' xxx ') #只能写字符串

F.flush () #立即把缓冲区里面的内容写到磁盘里面

F.writelines () #写可迭代对象
F.tell () #获取当前文件指针的位置
F.close ()

python--file read/write

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