working_with_python
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| Both sides previous revisionPrevious revision | Last revisionBoth sides next revision | ||
| working_with_python [2020/12/03 15:24] – [Jupyter Notebooks] deul | working_with_python [2020/12/22 14:06] – jansen | ||
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| Line 138: | Line 138: | ||
| virtualenv --help | virtualenv --help | ||
| </ | </ | ||
| + | |||
| ==== METHOD 3: easy_install with the `--user' | ==== METHOD 3: easy_install with the `--user' | ||
| Easy Install is a python module (easy_install) that lets you automatically download, build, install, and manage Python packages. | Easy Install is a python module (easy_install) that lets you automatically download, build, install, and manage Python packages. | ||
| Line 155: | Line 156: | ||
| python -m easy_install --help | python -m easy_install --help | ||
| </ | </ | ||
| + | |||
| + | ==== Migrating packages between python versions ==== | ||
| + | Another issue when using personal installs may arrise on operating system upgrades, when a newer version of python is made the default (eg, moving from python 3.7 to python 3.9). | ||
| + | Notes copied from the [[https:// | ||
| + | - Make a list of installed packages in the old python version: | ||
| + | <code bash> | ||
| + | python3.7 -m pip freeze > installed.txt | ||
| + | </ | ||
| + | - Reinstall for the current python version: | ||
| + | <code bash> | ||
| + | python3.9 -m pip install --user -r installed.txt | ||
| + | </ | ||
| + | - Optionally, uninstall the packages from the old python version and/or remove the obsolete directory under $HOME/ | ||
| ===== Example: how to let python search arbitrary library paths ===== | ===== Example: how to let python search arbitrary library paths ===== | ||
| For instance for python v2.7 installations, | For instance for python v2.7 installations, | ||
working_with_python.txt · Last modified: 2022/04/04 06:52 by jansen
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