How do I get the path and name of the file that is currently executing?

It’s not entirely clear what you mean by “the filepath of the file that is currently running within the process”.
sys.argv[0] usually contains the location of the script that was invoked by the Python interpreter.
Check the sys documentation for more details.

As @Tim and @Pat Notz have pointed out, the __file__ attribute provides access to

the file from which the module was
loaded, if it was loaded from a file

I think it’s just __file__ Sounds like you may also want to checkout the inspect module.

The __file__ attribute works for both the file containing the main execution code as well as imported modules.

See https://web.archive.org/web/20090918095828/http://pyref.infogami.com/__file__

You can use inspect.stack()

import inspect,os
inspect.stack()[0]  => (<frame object at 0x00AC2AC0>, 'g:\Python\Test\_GetCurrentProgram.py', 15, '<module>', ['print inspect.stack()[0]n'], 0)
os.path.abspath (inspect.stack()[0][1]) => 'g:\Python\Test\_GetCurrentProgram.py'

__file__

as others have said. You may also want to use os.path.realpath to eliminate symlinks:

import os

os.path.realpath(__file__)

import sys

print sys.path[0]

this would print the path of the currently executing script

The suggestions marked as best are all true if your script consists of only one file.

If you want to find out the name of the executable (i.e. the root file passed to the python interpreter for the current program) from a file that may be imported as a module, you need to do this (let’s assume this is in a file named foo.py):

import inspect

print inspect.stack()[-1][1]

Because the last thing ([-1]) on the stack is the first thing that went into it (stacks are LIFO/FILO data structures).

Then in file bar.py if you import foo it’ll print bar.py, rather than foo.py, which would be the value of all of these:

• __file__
• inspect.getfile(inspect.currentframe())
• inspect.stack()[0][1]

import sys
print sys.argv[0]

I used the approach with __file__
os.path.abspath(__file__)
but there is a little trick, it returns the .py file
when the code is run the first time,
next runs give the name of *.pyc file
so I stayed with:
inspect.getfile(inspect.currentframe())
or
sys._getframe().f_code.co_filename

I think this is cleaner:

import inspect
print inspect.stack()[0][1]

and gets the same information as:

print inspect.getfile(inspect.currentframe())

Where [0] is the current frame in the stack (top of stack) and [1] is for the file name, increase to go backwards in the stack i.e.

print inspect.stack()[1][1]

would be the file name of the script that called the current frame. Also, using [-1] will get you to the bottom of the stack, the original calling script.

I have a script that must work under windows environment.
This code snipped is what I’ve finished with:

import os,sys
PROJECT_PATH = os.path.abspath(os.path.split(sys.argv[0])[0])

it’s quite a hacky decision. But it requires no external libraries and it’s the most important thing in my case.

import os
print os.path.basename(__file__)

this will give us the filename only. i.e. if abspath of file is c:abcdabc.py then 2nd line will print abc.py

import os
os.path.dirname(os.path.abspath(__file__))

No need for inspect or any other library.

This worked for me when I had to import a script (from a different directory then the executed script), that used a configuration file residing in the same folder as the imported script.

import os
os.path.dirname(__file__) # relative directory path
os.path.abspath(__file__) # absolute file path
os.path.basename(__file__) # the file name only

This should work:

import os,sys
filename=os.path.basename(os.path.realpath(sys.argv[0]))
dirname=os.path.dirname(os.path.realpath(sys.argv[0]))

Update 2018-11-28:

Here is a summary of experiments with Python 2 and 3. With

main.py – runs foo.py
foo.py – runs lib/bar.py
lib/bar.py – prints filepath expressions

| Python | Run statement       | Filepath expression                    |
|--------+---------------------+----------------------------------------|
|      2 | execfile            | os.path.abspath(inspect.stack()[0][1]) |
|      2 | from lib import bar | __file__                               |
|      3 | exec                | (wasn't able to obtain it)             |
|      3 | import lib.bar      | __file__                               |

For Python 2, it might be clearer to switch to packages so can use from lib import bar – just add empty __init__.py files to the two folders.

For Python 3, execfile doesn’t exist – the nearest alternative is exec(open(<filename>).read()), though this affects the stack frames. It’s simplest to just use import foo and import lib.bar – no __init__.py files needed.

See also Difference between import and execfile

Original Answer:

Here is an experiment based on the answers in this thread – with Python 2.7.10 on Windows.

The stack-based ones are the only ones that seem to give reliable results. The last two have the shortest syntax, i.e. –

print os.path.abspath(inspect.stack()[0][1])                   # C:filepathslibbar.py
print os.path.dirname(os.path.abspath(inspect.stack()[0][1]))  # C:filepathslib

Here’s to these being added to sys as functions! Credit to @Usagi and @pablog

Based on the following three files, and running main.py from its folder with python main.py (also tried execfiles with absolute paths and calling from a separate folder).

C:filepathsmain.py: execfile('foo.py')
C:filepathsfoo.py: execfile('lib/bar.py')
C:filepathslibbar.py:

import sys
import os
import inspect

print "Python " + sys.version
print

print __file__                                        # main.py
print sys.argv[0]                                     # main.py
print inspect.stack()[0][1]                           # lib/bar.py
print sys.path[0]                                     # C:filepaths
print

print os.path.realpath(__file__)                      # C:filepathsmain.py
print os.path.abspath(__file__)                       # C:filepathsmain.py
print os.path.basename(__file__)                      # main.py
print os.path.basename(os.path.realpath(sys.argv[0])) # main.py
print

print sys.path[0]                                     # C:filepaths
print os.path.abspath(os.path.split(sys.argv[0])[0])  # C:filepaths
print os.path.dirname(os.path.abspath(__file__))      # C:filepaths
print os.path.dirname(os.path.realpath(sys.argv[0]))  # C:filepaths
print os.path.dirname(__file__)                       # (empty string)
print

print inspect.getfile(inspect.currentframe())         # lib/bar.py

print os.path.abspath(inspect.getfile(inspect.currentframe())) # C:filepathslibbar.py
print os.path.dirname(os.path.abspath(inspect.getfile(inspect.currentframe()))) # C:filepathslib
print

print os.path.abspath(inspect.stack()[0][1])          # C:filepathslibbar.py
print os.path.dirname(os.path.abspath(inspect.stack()[0][1]))  # C:filepathslib
print

I wrote a function which take into account eclipse debugger and unittest.
It return the folder of the first script you launch. You can optionally specify the __file__ var, but the main thing is that you don’t have to share this variable across all your calling hierarchy.

Maybe you can handle others stack particular cases I didn’t see, but for me it’s ok.

import inspect, os
def getRootDirectory(_file_=None):
    """
    Get the directory of the root execution file
    Can help: http://stackoverflow.com/questions/50499/how-do-i-get-the-path-and-name-of-the-file-that-is-currently-executing
    For eclipse user with unittest or debugger, the function search for the correct folder in the stack
    You can pass __file__ (with 4 underscores) if you want the caller directory
    """
    # If we don't have the __file__ :
    if _file_ is None:
        # We get the last :
        rootFile = inspect.stack()[-1][1]
        folder = os.path.abspath(rootFile)
        # If we use unittest :
        if ("/pysrc" in folder) & ("org.python.pydev" in folder):
            previous = None
            # We search from left to right the case.py :
            for el in inspect.stack():
                currentFile = os.path.abspath(el[1])
                if ("unittest/case.py" in currentFile) | ("org.python.pydev" in currentFile):
                    break
                previous = currentFile
            folder = previous
        # We return the folder :
        return os.path.dirname(folder)
    else:
        # We return the folder according to specified __file__ :
        return os.path.dirname(os.path.realpath(_file_))

To get directory of executing script

 print os.path.dirname( inspect.getfile(inspect.currentframe()))

Simplest way is:

in script_1.py:

import subprocess
subprocess.call(['python3',<path_to_script_2.py>])

in script_2.py:

sys.argv[0]

P.S.: I’ve tried execfile, but since it reads script_2.py as a string, sys.argv[0] returned <string>.

Try this,

import os
os.path.dirname(os.path.realpath(__file__))

print(__file__)
print(__import__("pathlib").Path(__file__).parent)

Here is what I use so I can throw my code anywhere without issue. __name__ is always defined, but __file__ is only defined when the code is run as a file (e.g. not in IDLE/iPython).

if '__file__' in globals():
    self_name = globals()['__file__']
elif '__file__' in locals():
    self_name = locals()['__file__']
else:
    self_name = __name__

Alternatively, this can be written as:

self_name = globals().get('__file__', locals().get('__file__', __name__))

Since Python 3 is fairly mainstream, I wanted to include a pathlib answer, as I believe that it is probably now a better tool for accessing file and path information.

from pathlib import Path

current_file: Path = Path(__file__).resolve()

If you are seeking the directory of the current file, it is as easy as adding .parent to the Path() statement:

current_path: Path = Path(__file__).parent.resolve()

The following returns the path where your current main script is located at. I tested this with Linux, Win10, IPython and Jupyter Lab. I needed a solution that works for local Jupyter notebooks as well.

import builtins
import os
import sys

def current_dir():
    if "get_ipython" in globals() or "get_ipython" in dir(builtins):
        # os.getcwd() is PROBABLY the dir that hosts the active notebook script.
        # See also https://github.com/ipython/ipython/issues/10123
        return os.getcwd()
    else:
        return os.path.abspath(os.path.dirname(sys.argv[0]))

Finding the home directory of the path in which your Python script resides

As an addendum to the other answers already here (and not answering the OP’s question, since other answers already do that), if the path to your script is /home/gabriel/GS/dev/eRCaGuy_dotfiles/useful_scripts/cpu_logger.py, and you wish to obtain the home directory part of that path, which is /home/gabriel, you can do this:

import os

# Obtain the home dir of the user in whose home directory this script resides
script_path_list = os.path.normpath(__file__).split(os.sep)
home_dir = os.path.join("/", script_path_list[1], script_path_list[2])

To help make sense of this, here are the paths for __file__, script_path_list, and home_dir. Notice that script_path_list is a list of the path components, with the first element being an empty string since it originally contained the / root dir path separator for this Linux path:

__file__         = /home/gabriel/GS/dev/eRCaGuy_dotfiles/useful_scripts/cpu_logger.py
script_path_list = ['', 'home', 'gabriel', 'GS', 'dev', 'eRCaGuy_dotfiles', 'useful_scripts', 'cpu_logger.py']
home_dir         = /home/gabriel

Source:

1. Python: obtain the path to the home directory of the user in whose directory the script being run is located [duplicate]