When trying to install Python dependencies using
requirements.txt file, you might encounter the following error:
ERROR: Could not open requirements file: [Errno 2] No such file or directory: 'requirements.txt'
This error occurs when you run the
pip install -r requirements.txt command but the
requirements.txt file is not available in the current directory.
There are three possible methods you can use to resolve this error:
- Generate a requirements.txt file using
- Generate and run
requirements.txtfile from a Docker instance
- Find the location of
requirements.txtand use the correct path when installing
I will show you how to fix this error in practice using the methods above.
1. Generate the requirements.txt file
You can resolve this error by generating a
requirements.txt file with the
pip freeze command:
pip freeze > requirements.txt # For pip3 users: pip3 freeze > requirements.txt
freeze command will generate a
requirements.txt file based on the dependencies you’ve installed using pip.
Once finished, you should be able to run the pip install command again without receiving this error.
2. How to generate and run requirements.txt from Docker
If you’re using Docker to run your Python code, then you can generate and install the
requirements.txt file by writing this command in your Dockerfile:
RUN pip freeze > requirements.txt RUN pip install --no-cache-dir -r requirements.txt
The first command uses
pip freeze to generate the text file, and the second command will install packages defined in the file.
3. How to find your requirements.txt file
If you think you already have the requirements.txt file somewhere in your project, then you can use the
find command to get the location of your
From the root directory of your project, run the following command:
find . -regex '.*requirements.txt$'
You should see a response as follows:
You can then use this location when running the pip install command as shown below:
pip install -r ./src/requirements.txt # or pip3: pip3 install -r ./src/requirements.txt
pip can be used to install from a different path, but you need to provide the relative path from the current directory as shown below:
pip3 install -r ./path/to/file
If you already found the
requirements.txt file, you can also move that file to the root directory for easy access.
[Errno 2] No such file or directory: 'requirements.txt' when it can’t find the
requirements.txt file needed by pip.
To resolve this error, you can generate a
requirements.txt file by running the
pip freeze > requirements.txt command.
You can also use the
find command to find the location of your requirements.txt file and use it in your
pip install command.
I hope this tutorial helps. See you in other tutorials! 👍