How to check if a module is installed in Python and, if not, install it in code?

Question

I would like to install the 'mutagen' and 'gTTS' modules for my code, but I want him to install the modules on every computer that does not have them, but he will not try to install them if they are already installed. I currently have:

def install(package):
    pip.main(['install', package])

install('mutagen')

install('gTTS')

from gtts import gTTS
from mutagen.mp3 import MP3

However, if you already have modules, it will simply add unnecessary clutter to the beginning of the program whenever you open it.

Answer 1

To check if the package exists or not, and install it in the latter case, try using the module pip:

: , ( post):

from contextlib import contextmanager
import sys, os

@contextmanager
def suppress_stdout():
    with open(os.devnull, "w") as devnull:
        old_stdout = sys.stdout
        sys.stdout = devnull
        try:  
            yield
        finally:
            sys.stdout = old_stdout

import pip

required_pkgs = ['mutagen', 'gTTS']
installed_pkgs = [pkg.key for pkg in pip.get_installed_distributions()]

for package in required_pkgs:
    if package not in installed_pkgs:
        with suppress_stdout():
            pip.main(['install', package])

try except:

import pip

pkgs = ['mutagen', 'gTTS']
for package in pkgs:
    try:
        import package
    except ImportError, e:
        pip.main(['install', package])

.. @zwer, , . , Python.

Answer 2

:

python -m MyModule

,

, :

pip freeze > requirements.txt

, python

:

pip install -r requirements.txt

Answer 3

Another solution is to put the import statement for everything that you are trying to import into the try / except block, so if it works, it will be installed, but if it does not throw an exception, and you can run the command to install it.