pip installation succeeds but Python says module not found

Question

I am trying to install a package with pip. The installation is successful but when trying to import the modules in a subpackage it shows me an error message that says "ModuleNotFoundError: No module named...".

The structure of the package is as follows:

Gestor_Clientes_v2/
   ├─   LICENCE.txt
   ├─   manager_main/
     ├─   __init__.py
     ├─   run.py
     ├─   support.py
     ├─   manager_clients.py
     └─   menu.py
   ├─   README.md
   ├─   setup.py
   └─   test/
     ├─   __init__.py
     └─   test_manager_clients.py

The setup file has the following information:

#!/usr/bin/env python

from setuptools import setup, find_packages

with open('README.md') as file: readme = file.read()

setup(name = 'gestor-clientes',
      version = '2.0',
      author = 'author',
      author_email = 'info@server.com',
      url = 'https://www.server.com/',
      description = 'Un simple gestor de clientes',
      long_description = readme,
      packages = ['manager'],
      test_suite = 'program.test',
      entry_points = {'console_scripts': ['program = manager.run:main']},
      license = 'MIT Licence',
      keywords = 'gestor clientes proyecto',
      classifiers = [
          'Development Status :: 2 - Pre-Alpha',
          'Topic :: Education',
          'Intended Audience :: Education',
          'License :: OSI Approved :: MIT License',
          'Programming Language :: Python :: 3 :: Only',
          'Operating System :: Linux',
          'Operating System :: MacOS',
          'Operating System :: Windows'
      ]



      )

__init__.py

__all__ = ['run', 'manager_clients', 'menu', 'support']

menu.py

"""Fichero principal del programa"""

from sys import path 
path.append('..')

from menu import Menu


def main():
    Menu.options()

if __name__ == '__main__':
    main()

manager_clients.py

""" Administrador de clientes """
import sys
sys.path.append("..")
from manager import support


class ClientData:

    def __init__(self, name: str, first_surname:str, second_surname:str, birth_date:str, nationality:str, nip:str):
        self.name = name
        self.first_surname = first_surname
        self.second_surname = second_surname
        self.birth_date = birth_date
        self.nationality = nationality
        self.nip = nip

    def __str__(self):
        return f"{self.nip}: {self.first_surname} {self.second_surname} {self.name} {self.birth_date} {self.nationality}"

#more code...

menu.py

""" Menú del programa """
from sys import path
path.append('..')

from manager.support import clear_screen
from manager.manager_clients import ClientAdmin

class Menu:

    def options():
        while True:
            clear_screen()  
            print("========================\n",\
                  "|BIENVENIDO AL GESTOR|",\
                  "\n========================",\
                  "\n    Elija una opción    ",\
                  "\n------------------------",\
                  "\n[1] Lista de clientes.",\
                  "\n[2] Buscar cliente.",\
                  "\n[3] Añadir nuevo cliente.",\
                  "\n[4] Actualizar datos del cliente.",\
                  "\n[5] Borrar cliente.",\
                  "\n[6] Salir.")

            option = input(">>> ")
            clear_screen()
            if option == '1':
                print("--INFORMACIÓN DE CLIENTES DISPONIBLES--\n")
                ClientAdmin.info_all_clients()

#more code...

support.py

"""Funciones de ayuda"""
from sys import path
from os import system
import re
from platform import system as OS
path.append("..")

from manager import manager_clients



def clear_screen():
    if OS() == "Windows":
        system('cls')
    else:
        system('clear')


def input_text(min_len, max_len):
    while True:
        text = input("> ")
        if len(text) >= min_len and len(text) <= max_len:
            return text


def is_valid(nip: str):
    if not re.match('[0-9]{2}[A-Z]{3}', nip):
        return False
    for c in manager_clients.ClientAdmin.clients:
        if c.nip == nip:
            return False
    return True

When I run the "run.py" script from the command line the program works correctly just like when I run the tests. When I install the package using pip install Gestor_Clientes_v2/ I get the following:

Processing ./Gestor_Clientes_v2
Building wheels for collected packages: gestor-clientes
  Building wheel for gestor-clientes (setup.py) ... done
  Created wheel for gestor-clientes: filename=gestor_clientes-2.0-cp37-none-any.whl size=6120 sha256=50337e3ed6672cf714d81103c53dd3b957f6c10722c14f952b49baa1a814dbac
  Stored in directory: /tmp/pip-ephem-wheel-cache-be04i_g5/wheels/e4/03/c1/ce19d5766499ca97b57afbdc34598a26f32ca3b9eb01754979
Successfully built gestor-clientes
Installing collected packages: gestor-clientes
Successfully installed gestor-clientes-2.0

The packages appear in pip list as gestor-clientes but when I want to import any of the modules in "manager /" I get the error:

In [1]: import manager                                                
----------------------------------------------------------------------
ModuleNotFoundError                  Traceback (most recent call last)
<ipython-input-1-26cb231bd30e> in <module>
----> 1 import manager

~/anaconda3/lib/python3.7/site-packages/manager/__init__.py in <module>
----> 1 from manager import run
      2 from manager import manager_clients
      3 from manager import menu
      4 from manager import support

~/anaconda3/lib/python3.7/site-packages/manager/run.py in <module>
      4 path.append('..')
      5 
----> 6 from menu import Menu
      7 
      8 

ModuleNotFoundError: No module named 'menu'

In [2]:

I have been guided by different examples of packages with a similar structure and when I install them I can import their modules.

I am relatively new to Python and there are still many things that I don't know well and I think there is something missing in my modules and my setup file.

I hope you can help me review the structure of my package and give me some ideas to solve my problem. Thanks in advance.

Answer 1

I think you should try to install the package using pip3, based on the previous syntax

pip3 install packagename

In some cases, when you have a preinstalled Python 2, this can be the solution, because even though you’ve installed the package, it can only be accessed by the Python 2 interpreter as they are different installations.