Python打开文件 - 你不需要文件的完整路径吗？

Question

Every example I see about opening a file in Python has something like this:

myFile = open('somefilenamehere', 'r')

It never works for me when I just type the file name...you should always put full directory path where that file is

myFile = open('C:\\blah\\blah\\somefilenamehere', 'r')

Does it work for someone? I mean just putting the name of the file?

Answer 1

That has more to do with the process working directory than with where the script is. For example, you have a script called cat.py like:

import sys
with open(sys.argv[1]) as fp:
    print fp.read()

and then you do:

$ cd /tmp
$ echo 12345 > test.txt
$ python /path/to/cat.py test.txt
12345

This will work as expected regardless of the script location, since the working directory is /tmp and the script doesn't change it.

Answer 2

It's a relative path. So, you can put only filename if you run script in the same directory.