I need to install a package from PyPi straight within my script. Maybe there's some module or distutils
[distribute
, pip
etc.] feature which allows me to just execute something like pypi.install['requests']
and requests will be installed into my virtualenv.
asked Sep 8, 2012 at 17:33
chuwychuwy
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10
The officially recommended way to install
packages from a script is by calling pip's command-line interface via a subprocess. Most other answers presented here are not supported by pip. Furthermore since pip v10, all code has been moved to pip._internal
precisely in order to make it clear to users that programmatic use of pip is not allowed.
Use sys.executable
to ensure that you will call the same pip
associated with the
current runtime.
import subprocess
import sys
def install[package]:
subprocess.check_call[[sys.executable, "-m", "pip", "install", package]]
wim
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answered May 9, 2018 at 13:47
Aaron de WindtAaron de Windt
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7
You can also use something like:
import pip
def install[package]:
if hasattr[pip, 'main']:
pip.main[['install', package]]
else:
pip._internal.main[['install', package]]
# Example
if __name__ == '__main__':
install['argh']
answered Apr 11, 2013 at 13:54
Rikard AnglerudRikard Anglerud
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23
If you want to use pip
to install required package and import it after installation, you can use this code:
def install_and_import[package]:
import importlib
try:
importlib.import_module[package]
except ImportError:
import pip
pip.main[['install', package]]
finally:
globals[][package] = importlib.import_module[package]
install_and_import['transliterate']
If you installed a package as a user you can encounter the problem that you cannot just import the package. See How to refresh sys.path? for additional information.
answered Jul 16, 2014 at 6:45
rominfrominf
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6
This should work:
import subprocess
def install[name]:
subprocess.call[['pip', 'install', name]]
answered Sep 8, 2012 at 17:52
quantumquantum
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11
i added some exception handling to @Aaron's answer.
import subprocess
import sys
try:
import pandas as pd
except ImportError:
subprocess.check_call[[sys.executable, "-m", "pip", "install", 'pandas']]
finally:
import pandas as pd
answered Sep 21, 2019 at 12:58
Sohan DasSohan Das
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4
For
installing multiple packages, I am using a setup.py
file with the following code:
import sys
import subprocess
import pkg_resources
required = {'numpy', 'pandas', ''}
installed = {pkg.key for pkg in pkg_resources.working_set}
missing = required - installed
if missing:
# implement pip as a subprocess:
subprocess.check_call[[sys.executable, '-m', 'pip', 'install', *missing]]
answered Jul 26, 2020 at 6:09
1
import os
os.system['pip install requests']
I tried above for temporary solution instead of changing docker file. Hope these might be useful to some
answered Nov 30, 2020 at 15:20
1
You define the dependent module inside the setup.py of your own package with the "install_requires" option.
If your package needs to have some console script generated then you can use the "console_scripts" entry point in order to generate a wrapper script that will be placed within the 'bin' folder [e.g. of your virtualenv environment].
answered Sep 8, 2012 at 17:38
3
If you want a more efficient answer that expands on subprocess.check_call
. You can first check if the requirement has already been met using pkg_resources
.
This
works for different requirment specifiers which is nice. e.g. >=
, ==
import sys
import subprocess
import pkg_resources
from pkg_resources import DistributionNotFound, VersionConflict
def should_install_requirement[requirement]:
should_install = False
try:
pkg_resources.require[requirement]
except [DistributionNotFound, VersionConflict]:
should_install = True
return should_install
def install_packages[requirement_list]:
try:
requirements = [
requirement
for requirement in requirement_list
if should_install_requirement[requirement]
]
if len[requirements] > 0:
subprocess.check_call[[sys.executable, "-m", "pip", "install", *requirements]]
else:
print["Requirements already satisfied."]
except Exception as e:
print[e]
Example usage:
requirement_list = ['requests', 'httpx==0.18.2']
install_packages[requirement_list]
Relevant Info Stackoverflow Question: 58612272
answered Aug 8, 2021 at 16:45
Glen ThompsonGlen Thompson
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1
Try the below. So far the best that worked for me Install the 4 ones first and then Mention the new ones in the REQUIRED list
import pkg_resources
import subprocess
import sys
import os
REQUIRED = {
'spacy', 'scikit-learn', 'numpy', 'pandas', 'torch',
'pyfunctional', 'textblob', 'seaborn', 'matplotlib'
}
installed = {pkg.key for pkg in pkg_resources.working_set}
missing = REQUIRED - installed
if missing:
python = sys.executable
subprocess.check_call[[python, '-m', 'pip', 'install', *missing], stdout=subprocess.DEVNULL]
answered May 2, 2021 at 19:59
RijinRijin
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1
To conditionally install multiple packages with exact version, I've been using this pattern basing on @Tanmay Shrivastava's answer:
import sys
from subprocess import run, PIPE, STDOUT
import pkg_resources
def run_cmd[cmd]:
ps = run[cmd, stdout=PIPE, stderr=STDOUT, shell=True, text=True]
print[ps.stdout]
# packages to be conditionally installed with exact version
required = {"click==8.0.1", "semver==3.0.0.dev2"}
installed = {f"{pkg.key}=={pkg.version}" for pkg in pkg_resources.working_set}
missing = required - installed
if missing:
run_cmd[f'pip install --ignore-installed {" ".join[[*missing]]}']
answered Sep 21, 2021 at 16:29
Glenn MohammadGlenn Mohammad
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