I'm trying to use pip to install a package. I try to run pip install from the Python shell, but I get a SyntaxError. Why do I get this error? How do I use pip to install the package?
>>> pip install selenium
^
SyntaxError: invalid syntax
pip is run from the command line, not the Python interpreter. It is a program that installs modules, so you can use them from Python. Once you have installed the module, then you can open the Python shell and do import selenium.
The Python shell is not a command line, it is an interactive interpreter. You type Python code into it, not commands.
Use the command line, not the Python shell (DOS, PowerShell in Windows).
C:\Program Files\Python2.7\Scripts> pip install XYZ
If you installed Python into your PATH using the latest installers, you don't need to be in that folder to run pip
Terminal in Mac or Linux
$ pip install XYZ
As #sinoroc suggested correct way of installing a package via pip is using separate process since pip may cause closing a thread or may require a restart of interpreter to load new installed package so this is the right way of using the API: subprocess.check_call([sys.executable, '-m', 'pip', 'install', 'SomeProject']) but since Python allows to access internal API and you know what you're using the API for you may want to use internal API anyway eg. if you're building own GUI package manager with alternative resourcess like https://www.lfd.uci.edu/~gohlke/pythonlibs/
Following soulution is OUT OF DATE, instead of downvoting suggest updates. see https://github.com/pypa/pip/issues/7498 for reference.
UPDATE: Since pip version 10.x there is no more get_installed_distributions() or main method under import pip instead use import pip._internal as pip.
UPDATE ca. v.18 get_installed_distributions() has been removed. Instead you may use generator freeze like this:
from pip._internal.operations.freeze import freeze
print([package for package in freeze()])
# eg output ['pip==19.0.3']
If you want to use pip inside the Python interpreter, try this:
import pip
package_names=['selenium', 'requests'] #packages to install
pip.main(['install'] + package_names + ['--upgrade'])
# --upgrade to install or update existing packages
If you need to update every installed package, use following:
import pip
for i in pip.get_installed_distributions():
pip.main(['install', i.key, '--upgrade'])
If you want to stop installing other packages if any installation fails, use it in one single pip.main([]) call:
import pip
package_names = [i.key for i in pip.get_installed_distributions()]
pip.main(['install'] + package_names + ['--upgrade'])
Note: When you install from list in file with -r / --requirement parameter you do NOT need open() function.
pip.main(['install', '-r', 'filename'])
Warning: Some parameters as simple --help may cause python interpreter to stop.
Curiosity: By using pip.exe you actually use python interpreter and pip module anyway. If you unpack pip.exe or pip3.exe regardless it's python 2.x or 3.x, inside is the SAME single file __main__.py:
# -*- coding: utf-8 -*-
import re
import sys
from pip import main
if __name__ == '__main__':
sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
sys.exit(main())
To run pip in Python 3.x, just follow the instructions on Python's page: Installing Python Modules.
python -m pip install SomePackage
Note that this is run from the command line and not the python shell (the reason for syntax error in the original question).
I installed python and when I run pip command it used to throw me an error like shown in pic below.
Make Sure pip path is added in environmental variables. For me, the python and pip installation path is::
Python: C:\Users\fhhz\AppData\Local\Programs\Python\Python38\
pip: C:\Users\fhhz\AppData\Local\Programs\Python\Python38\Scripts
Both these paths were added to path in environmental variables.
Now Open a new cmd window and type pip, you should be seeing a screen as below.
Now type pip install <<package-name>>. Here I'm installing package spyder so my command line statement will be as pip install spyder and here goes my running screen..
and I hope we are done with this!!
you need to type it in cmd not in the IDLE. becuse IDLE is not an command prompt if you want to install something from IDLE type this
>>>from pip.__main__ import _main as main
>>>main(#args splitted by space in list example:['install', 'requests'])
this is calling pip like pip <commands> in terminal. The commands will be seperated by spaces that you are doing there to.
If you are doing it from command line,
try -
python -m pip install selenium
or (for Python3 and above)
python3 -m pip install selenium
On my Mac, I have 2 versions of Python running, one from Brew (3.9) and another one (3.8)
When I try to install some data science packages via pip3, they are installed but cannot be used as 3.9 takes over.
python3 --version
Python 3.9.10
which python3
/opt/homebrew/bin/python3
pip3 install pandas
Requirement already satisfied: pandas in /Library/Python/3.8/site-packages
python3
import pandas
ModuleNotFoundError: No module named 'pandas'
pandas is just one example of the many packages I see via pip3 freeze.
What are my options to point to installed versions at Python 3.8 ?
There are different ways to approach this:
One temporary option is to use alias like this:
alias python3=python3.8
You can use directly python3.8 in your terminal.
If you want to install the packages to python3.9 then you can also use pip3.9
You could use:
python3 -m pip install module
which will use pip to install to the python version you just used.
The recommended way is to use:
python3 -m pip install module
My code starts with installing these packages -
pip3 install ipython
pip3 install selenium
pip3 install time
pip3 install parsel
pip3 install csv
but I get -
File "<ipython-input-7-cae965d78112>", line 1
conda install ipython
^
SyntaxError: invalid syntax
I have tried replacing pip3 with pip and conda, it still gives the same error.Please help me to install these packages.
thanks!!!
pip3 and conda are utilities separate to the Python programming language. pip3 and conda make it easier for users to install python packages to their machine/virtual environment which is why you get SyntaxError: invalid syntax because what you've written is not valid Python.
If you want to use pip3 or conda these commands should be used at into a terminal. These tools search online for modules you want to install, download them and install them into the appropriate location (for your user or into your virtual enviroment). If you try to install something that can't be found online in the pypi you'll get an error.
You've tried to install the module csv using pip3 install csv. The csv module is part of Python's standard library so pip3 will not find this package on pypi. Being part of the standard library means that every installation of Python has this library. To use the csv module you can do import csv in your notebook/.py file. The same goes for the module time.
I installed miniconda and just created a conda environment:
conda create -n my_env python=3.5 anaconda
I am trying to:
import cvlib
But I am getting the error:
ImportError: No module named cvlib
So I have tried to install using:
pip3 install cvlib
This seemed to work successfully, but then when I try to import cvlib I am still getting the ImportError: No module named cvlib error (I have retarted my terminal after the installation).
Is this a problem with my PYTHONPATH not containing the path to the directory that now contains cvlib? If so, how do I find where cvlib is saved so that I can add the path?
Check if the library is in your python directory. Otherwise, make a repl.it account, and install cvlib, and check the functions or the lib name. Maybe try searching a more advanced installation of cvlib.
it might have occurred due to the version of python you installed or due to the directory, you installed.
try uninstalling the current version of python and try installing an older version of python and install it in the directory as shown below:
C:\Users\Rajish\AppData\Local\Programs\Python\Python39
also, select add the path to environment variables while installing
and after that install cvlib and all other required modules and packages
it worked for me.
Title says it all;
Tried typical cmd commands like:
pip install pypiwin32
python -m pip install pypiwin32
Python script:
import pip
def install(package):
pip.main(['install', package])
if __name__ == '__main__':
install("pypiwin32") # also tried 'pywin32'
I run the above script and get the message:
Requirement already satisfied: pypiwin32 in 'path'
Then run test command:
import pypiwin32
and get:
builtins.ModuleNotFoundError: No module named 'pypiwin32'
Is there something wrong with my path? Do i HAVE to install it as a .whl file?
Not sure what I am doing wrong here. I am wanting a module to convert text to speech.
Ok, not sure if i should answer my own question or delete this, but it may help someone in the future.
I went into my python path and checked my .pyd files, it turns out there was no module called pypiwin32. instead the module is called win32com.pyd
So using the following code:
import win32com.client as wincl
wincl.Dispatch("SAPI.SpVoice").Speak("Speak English, parle français")