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+For all projects first:
+```
+pip install pytest pytest-xdist
+```
+Pandas:
+```
+pip install numpy pytz Cython hypothesis
+python setup.py install
+bash test_fast.sh
+```
+Django:
+```
+pip install .
+pip install -r tests/requirements./py3.txt
+pytest
+```
+Keras:
+```
+pip install -r requirements.txt
+cd keras
+python runall_tests.py
+```
+Requests:
+```
+pytest
+```
+Rich:
+```
+pip install pygments commonmark
+pytest
+```
+Scikit-learn:
+```
+pip install -r requirements.txt
+python setup.py install
+pytest --showlocals -v sklearn --durations=20
+```
+Scrapy:
+```
+pip install twisted lxml parsel w3lib cryptography itemadapter pydispatch pyOpenSSL protego
+pip install -r tests/requirements.txt
+pytest
+```
+Thefuck:
+```
+pip install -r requirements.txt
+python setup.py install
+pytest
+```