As a result the packages will not be installed into your environment. If you do not have pip inside your conda environment, invoking pip defaults to the global pip module. The ‘-I’ flag ignores an existing installation, if you need to remove that version and install the one from the ‘requirements.txt’ file you have to manually delete the package from the current conda environment. The following code illustrates installation from a file. If you need to install from a pip ‘requirements.txt’ file, first create an empty conda environment, install pip inside it and then proceed to install the packages using pip inside it. Where REVNUM is the revision number obtained from listing the revisions Installation from Pip ‘requirements.txt’ file To revert back to a previous version use: conda install -revision=REVNUM To list the changes that you have made to your environment conda list -revisions This has to be done from outside the environment after the environment has been deactivated. To update a conda environment named ‘test’ from a file ‘requirements.txt’: conda env update -n test -f requirements.txt To create a named environment ‘pytorch’ from a file ‘requirements.txt’: conda env create -f requirements.txt -n pytorch You can do this by modifying the file and adding the pip modules as shown: name: rq_env This allows you to install modules that were installed with pip as well. To export only the modules that were requested: conda env export -from-history > test.yml To export a specific environment, in this case just the base environment (usually called ‘base’): conda env export -n base > requirements.txt To export a conda environment from within the environment to a file ‘test.yml’: conda env export > test.yml List all conda environments: conda env list To remove an environment named ‘envname’: conda env remove -n envname To create an environment from the base environment: conda create -name myenv -clone base To create a named environment from a file ‘test.yml’: conda env create -f test.yml -n pytorch The environment name comes from the line ‘name: tag’ inside the ‘test.yml’ file. To create an environment from a file ‘test.yml’: conda env create -f test.yml To create a conda environment named ‘myenv’: conda create -name myenv
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