Differences

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--- pip_notes [2021/06/29 18:47] – [links I came across] admin
+++ pip_notes [2023/04/28 15:44] (current) – [install a specific version of a package] raju
@@ Line 1: / Line 1: @@
+==== install a package ====
+<code>
+pip install --ignore-installed PyYAML
+</code>
+Ref:- https://stackoverflow.com/questions/53807511/pip-cannot-uninstall-package-it-is-a-distutils-installed-project
+==== install a specific version of a package ====
+<code>
+pip install <package>==<version>
+</code>
+For example
+<code>
+pip install pandas==1.5.3
+</code>
+==== reinstall an existing package ====
+<code>
+pip install --upgrade --force-reinstall <package>
+</code>
+  * https://stackoverflow.com/questions/51913361/difference-between-pip-install-options-ignore-installed-and-force-reinstall - explains the difference between --force-reinstall and --ignore-installed
+==== pip cache ====
+install a package without using the cache, just for this run.
+  pip install --no-cache-dir <package>
+configure pip to not use the cache "globally" (in all commands)
+  pip config set global.cache-dir false
+remove all wheel files related to matplotlib from pip's cache.
+  pip cache remove matplotlib
+clear all files from pip's cache.
+  pip cache purge
+pip cache directory
+  pip cache dir
+Availability: {'pip cache': 'pip >= 20.1', 'pip config': 'pip >= 10.0', '--no-cache-dir': 'pip >= 6.0'}
+Ref:-
+  * https://stackoverflow.com/a/61762308/6305733 - response from a pip maintainer.
 ==== upgrade pip ====
 <code>
@@ Line 5: / Line 48: @@
 ==== links I came across ====
+  * https://caremad.io/posts/2013/07/setup-vs-requirement/ - setup.py vs requirements.txt - an article by Donald Stufft
+    * Easy to understand, well written.
+    * found it in https://pip.pypa.io/en/stable/user_guide/#requirements-files
   * Changes to the pip dependency resolver in 20.3 - https://pip.pypa.io/en/stable/user_guide/#changes-to-the-pip-dependency-resolver-in-20-3-2020
   * https://pip.pypa.io/en/stable/news/ - pip changelog