emh emh - 3 years ago 194
Python Question

Stop pip from failing on single package when installing with requirements.txt

I am installing packages from requirements.txt


pip install -r requirements.txt


The requirements.txt file reads:

Pillow
lxml
cssselect
jieba
beautifulsoup
nltk


lxml
is the only package failing to install and this leads to everything failing (expected results as pointed out by larsks in the comments). However, after
lxml
fails
pip
still runs through and downloads the rest of the packages.

From what I understand the
pip install -r requirements.txt
command will fail if any of the packages listed in the
requirements.txt
fail to install.

Is there any argument I can pass when running
pip install -r requirements.txt
to tell it to install what it can and skip the packages that it cannot, or to exit as soon as it sees something fail?

MZD MZD
Answer Source

Running each line with pip install may be a workaround.

cat requirements.txt | xargs -n 1 pip install

Note: -a parameter is not available under MacOS, so old cat is more portable.

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