[Solved] Add to path or python path

[aureliencperion]

Hello,

I tried many things (including searching here) which is why I finally ask even though I feel a bit dumb.
How to add your code to $PATH and $PYTHONPATH?

Sub-optimal solution

import inspect
import os
import sys
from pathlib import Path

print("path={}".format(os.environ['PATH']))

def add_do_path(path_to_add):
    print("Adding to path: {}".format(path_to_add))
    sys.path.insert(0, path_to_add)

add_do_path(str(Path(os.path.dirname(os.path.abspath(inspect.getfile(inspect.currentframe())))).parent.parent.parent.parent))

(probably could be improved but I would rather do the correct way than improve this)

Configuration

/code/my_project/ python files and packages
/code/setup.py
etc.

Basically I call a script:

floyd run --cpu --env tensorflow-1.3 "bash ./my_project/.../script.sh"

from my_project import X

It fails with:

ModuleNotFoundError: No module named 'my_project'

Unsuccessful attempts

Here are my attemps:

floyd run --cpu --env tensorflow-1.3 "PATH=$PATH:/code && bash ./my_project/.../script.sh"
floyd run --cpu --env tensorflow-1.3 "PYTHONPATH=$PYTHONPATH:/code && bash ./my_project/.../script.sh"

And also in script.sh:

#!/usr/bin/env bash
echo 'export PYTHONPATH=/code:$PYTHONPATH' >> ~/.bashrc
echo 'export PATH=/code:$PATH' >> ~/.bashrc
cat ~/.bashrc
source ~/.bashrc
echo "pythonpath=$PYTHONPATH"
echo "path=$PATH"
python3 my_project/.../main.py

Attempts were quite combined...
I am probably missing something obvious...

Thanks for your help.

[naren]

Hey @aureliencperion

Usually you don't need to add the code path explicitly. For example if you structure your code like this:

/foo
/foo/__init__.py
/foo/main.py
/foo/tree.py

From inside your main.py you can import from tree.py using relative imports:

from tree import Branch

Then you can just execute the main.py file directly:

$ python /foo/main.py

Will this work for you?

There are also some recommendations on how to organize your code: http://docs.python-guide.org/en/latest/writing/structure/ and http://pythoncentral.io/how-to-create-a-python-package/

[aureliencperion]

Hello,
Thanks for your reply.

I think my code is structured correctly:

/foo
/foo/__init__.py
/foo/main.py
/foo/tree.py
/foo/bar
/foo/bar/__init__.py
/foo/bar/plop.py
/foo/bar/plop2.py

# inside foo.main
# what I do
from foo.bar.plop import A
# what I could do (relative import)
from bar.plop import A

The one thing I don't do though is relative imports.
My imports come always from the root dir of my project so I guess I could stop doing that.

I still wonder how to properly add it to the path but it is nota blocking issue to me so we can leave it at that.

[bradnywells]

import sys
if "C:\\My_Python_Lib" not in sys.path:
    sys.path.append("C:\\My_Python_Lib")

More on...pythonpath

[tsalama]

What worked for my project is prepending the current working directory to the load path:

sys.path.insert(0, os.getcwd())