How to properly install a python package within the code?

Question

I need to install a package, matplotlib. Install it within the code. I am a beginner and have very little knowledge about python coding.

import subprocess
import sys

def install(matplotlib):
    subprocess.call([sys.executable, "-m", "pip", "install", matplotlib])

Does that means. after the computer finish the code above, I can start using matplotlib commands?

But it don't seem like that, I stil get an error when:

import matplotlib.pyplot as plt

The error:

No module named 'matplotlib'

How I can fix this? I know this is a very basic problem, but I need help. Any help is appreciated!

Ahmed Ragab · Accepted Answer · 2019-04-18 14:24:47Z

2

You could use pip's python module to achieve that.

import pip

def install(package):
    if hasattr(pip, 'main'):
        pip.main(['install', package])
    else:
        pip._internal.main(['install', package])

edited Apr 18, 2019 at 14:24

answered Apr 18, 2019 at 14:21

Ahmed Ragab

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11 Comments

jsbueno Over a year ago

Yes - that, and safeguards for when things go wrong, and better yet - a check for matplotlib already being installed is the way to go.

Devesh Kumar Singh Over a year ago

Getting #AttributeError: module 'pip' has no attribute 'main'

Devesh Kumar Singh Over a year ago

AttributeError: module 'pip' has no attribute '_internal'

Giorgos Myrianthous Over a year ago

@DeveshKumarSingh What pip version are you using?

Devesh Kumar Singh Over a year ago

$ pip3.7 -V pip 19.0.3 from /Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/pip (python 3.7)

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Joshua Loader · Accepted Answer · 2019-04-18 14:27:25Z

1

Try using the pip library:

UPDATED

import pip
from pip import main
from pip._internal import main 

if hasattr(pip, 'main'):
    pip.main(['install', 'matplotlib'])
else:
    pip._internal.main(['install', 'matplotlib'])

edited Apr 18, 2019 at 14:27

answered Apr 18, 2019 at 14:22

Joshua Loader

3841 silver badge5 bronze badges

2 Comments

Zing Over a year ago

module 'pip' has no attribute 'main'

Joshua Loader Over a year ago

@Zing I have updated my answer :D I have this working in Python 3.7 :D

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