This content originally appeared on DEV Community and was authored by Sajidur Rahman Shajib
We are using pip freeze or pip3 freeze command for making requirements.txt for our python projects. We use pip freeze > requirements.txt right?
But when we try to install our project to another machine that time we use pip install -r requirements.txt command to install those packages which we need for that project. But most of the time we face an error which is - version not satisfied.
At first try to understand which is actually freeze for.
"pip freeze is a very useful command, because it tells you which modules you've installed with pip install and the versions of these modules that you are currently have installed on your computer. In Python, there's a lot of things that may be incompatible, such as certain modules being incompatible with other modules."
So if we use pip freeze to make requirements.txt which list we found those all dependencies we don't need our single project. And in that list we don't know which module is compatible and which is incompatible.
So what should be a better approach?
Use pip-compile command. This command makes requirements.txt with which dependencies only you need.
For this command at first install pip install pip-tools
Suppose you want install a django project so what should you do -
- At first create virtual environment -
python-venv env - Then active environment -
source env/bin/activate - Now create
requirements.infile and then write in it only 'django'. - Now write
pip-compile requirements.inand hit enter. Then you will find arequirements.txtlike -
#
# This file is autogenerated by pip-compile with python 3.8
# To update, run:
#
# pip-compile requirements.in
#
asgiref==3.5.0
# via django
backports-zoneinfo==0.2.1
# via django
django==4.0.2
# via -r requirements.in
sqlparse==0.4.2
# via django
Now you are ready to install your Django. Just write pip install -r requirements.txt and hit enter.
With exact dependencies and comments requirements.txt ready use. So now no unnecessary dependency related issues.
This content originally appeared on DEV Community and was authored by Sajidur Rahman Shajib
Sajidur Rahman Shajib | Sciencx (2022-02-10T14:23:32+00:00) Do not use `pip freeze`. Retrieved from https://www.scien.cx/2022/02/10/do-not-use-pip-freeze/
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