Install Python dependency packages from requirements.txt using conda.

install_packages.sh

#
#  Original solution via StackOverflow:
#    http://stackoverflow.com/questions/35802939/install-only-available-packages-using-conda-install-yes-file-requirements-t
#

#
#  Install via `conda` directly.
#  This will fail to install all
#  dependencies. If one fails,
#  all dependencies will fail to install.
#
conda install --yes --file requirements.txt

#
#  To go around issue above, one can
#  iterate over all lines in the
#  requirements.txt file.
#
while read requirement; do conda install --yes $requirement; done < requirements.txt

This should delete comment lines firstly.

I hope they fix this in the conda command, if this is really the case (maybe it's a problem with some packages' dependencies specification rather than conda), because conda says:
conda install --help (...) --file FILE Read package versions from the given file. Repeated file specifications can be passed (e.g. --file=file1 --file=file2). --no-deps Do not install, update, remove, or change dependencies. This WILL lead to broken environments and inconsistent behavior. Use at your own risk. --only-deps Only install dependencies.

This means, it should acually handle the deps.

BTW, the second part is a plain bash loop. In Windows it's done like this:

for /f %i in (requirements.txt) do conda install --yes %i - when run manually
for /f %%i in (requirements.txt) do conda install --yes %%i - when inside a BAT script.

Great

conda install --file requirements.txt

Yes @SpyderRivera seems like they've added this recently

what to do if the packages in requirement.txt are from different channel?

@pradyumnasagar append to the list of channels that conda will search for. For instance, if you want to use conda-forge:
conda config --append channels conda-forge

Thanks luiscape, for the tip on solving the requirements.txt with conda.

Thanks, an elegant way to make pip list compatible in Conda environment.

I hope they fix this in the conda command, if this is really the case (maybe it's a problem with some packages' dependencies specification rather than conda), because conda says:
conda install --help (...) --file FILE Read package versions from the given file. Repeated file specifications can be passed (e.g. --file=file1 --file=file2). --no-deps Do not install, update, remove, or change dependencies. This WILL lead to broken environments and inconsistent behavior. Use at your own risk. --only-deps Only install dependencies.

This means, it should acually handle the deps.

BTW, the second part is a plain bash loop. In Windows it's done like this:

for /f %i in (requirements.txt) do conda install --yes %i - when run manually
for /f %%i in (requirements.txt) do conda install --yes %%i - when inside a BAT script.

Thanks, It worked for me

conda install --file requirements.txt

does not work

I hope they fix this in the conda command, if this is really the case (maybe it's a problem with some packages' dependencies specification rather than conda), because conda says:
conda install --help (...) --file FILE Read package versions from the given file. Repeated file specifications can be passed (e.g. --file=file1 --file=file2). --no-deps Do not install, update, remove, or change dependencies. This WILL lead to broken environments and inconsistent behavior. Use at your own risk. --only-deps Only install dependencies.
This means, it should acually handle the deps.
BTW, the second part is a plain bash loop. In Windows it's done like this:
for /f %i in (requirements.txt) do conda install --yes %i - when run manually
for /f %%i in (requirements.txt) do conda install --yes %%i - when inside a BAT script.

Thanks, It worked for me

worked.