python module not found error no module named

Question

I have a few seperate pythone file and I am using them to import another py file. Modules that trying to import them are in seperate folder I code sample is below

from tez.library.image_crop import ImageCrop
from tez.library.image_process import ImageProcess
from tez.library.image_features import ImageFeatures
from tez.const.application_const import ApplicationConst
from tez.library.file_operation import FileOperation

this code is in where I want to start the py file using commond line as "python samples1.py" and thrown an error as below

Traceback (most recent call last): File "samples1.py", line 1, in from tez.library.image_crop import ImageCrop ModuleNotFoundError: No module named 'tez'

folder structure:

.tez
-- library
---- image_crop.py
---- image_process.py
---- image_features.py
--src
---- samples1.py

Python version: 3.8
Pip: 20.0.2
Windows 10 Pro 1909

Answer 1

If you are building a package called tez (and since you tried to import it I think you are). Then everything with tez needs to refer to itself locally. All the files in the tez package need to refer to each other with the "." and ".." imports.

In samples1.py:

from ..library.image_crop import <something>

EDIT:

It sounds like you are misunderstanding how python imports things. When you run "import X" in a python script, then python looks for a package named X under sys.path. You can append to sys.path at the top of your script if you have a custom package to look for.

import sys
sys.path.append(<directory of tez>)

import tez

However, it is strongly recommended that you should not be importing from a file that is under the directory structure of the package name. If "examples" is a directory of examples that use the package "tez" then "examples" should be located outside the package "tez". If "examples" is inside the package "tez", then "examples" should be doing local imports "with-in" the package.

Getting a handle on package use can be tricky.

Answer 2

sample.py can't see above of src folder, but you can tell Python to do this.:

import sys
import os
tez = os.path.dirname(os.path.dirname(__file__))
# __file__ is path of our file (samples.py)
# dirname of __file__ is "src" in our state
# dirname of "src" is "tez" in our state

sys.path.append(tez) # append tez to sys.path, python will look at here when you try import something

import library.image_crop # dont write "tez"

But this is not a very good design I think.