Python 3 - Install
Last Updated: 2022-08-06
Install Python
Mac OS X
Python is shipped with Mac OS X by default: /usr/bin/python
Starting from El Capitan, due to System Integrity Protection(SIP), if pip install
fails("operation not permitted"), you can use homebrew
to install a local copy:
# Before brew install
$ which python
/usr/bin/python
$ brew install python
# After brew install
$ which python
/usr/local/bin/python
Since Python 3.4, pip
is installed alone with Python by default.
Install From Source Code
$ sudo apt-get install libssl-dev openssl
$ wget https://www.python.org/ftp/python/3.5.0/Python-3.5.0.tgz
$ tar xzvf Python-3.5.0.tgz cd Python-3.5.0.tgz
$ ./configure
$ make
$ sudo make install
Install Python Without Sudo (Root Privilege)
Specify install path during configure
and do not use sudo
in make install
:
$ ./configure —prefix=$HOME/myfolder
$ make
$ make install
Install pip
This invocation will install pip if it is not already installed, but otherwise does nothing
$ python3 -m ensurepip
to upgrade
$ python3 -m ensurepip --upgrade
or
$ pip install --upgrade pip
Check Version
$ pip -V
pip 8.x.x from /usr/local/lib/python2.7/site-packages (python 2.7)
$ pip3.5 -V
pip 8.x.x from /usr/local/lib/python3.5/site-packages (python 3.5)
- pip replaces easy_install
- new packages are delivered as
whl
instead ofegg
- same: both are zip files
- differences:
egg
can be loaded directly without unpacking;wheel
s have to be unpacked upon installation
- prefer
venv
tovirtualenv
Check Version
$ pip -V
pip 8.0.2 from /usr/local/lib/python3.5/site-packages (python 3.5)
Upgrade pip
$ pip install -U pip
Using pip
Install packages
$ pip install <package>
Uninstall packages
$ pip uninstall <package>
List installed packages
$ pip list
Packages are installed in:
- Mac OS X:
- 2.x:
/Library/Python/<version>/site-packages
- 3.x:
/usr/local/lib/python3.x/site-packages
- 2.x:
Save Installed Package List
$ pip freeze > requirements.txt
Install from requirements list:
$ pip install -r requirements.txt