Update cheatsheets

pip3

@@ -0,0 +1,37 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# pip3
+
+> Python package manager.
+> More information: <https://pip.pypa.io>.
+
+- Install a package:
+
+`pip3 install {{package}}`
+
+- Install a specific version of a package:
+
+`pip3 install {{package}}=={{version}}`
+
+- Upgrade a package:
+
+`pip3 install --upgrade {{package}}`
+
+- Uninstall a package:
+
+`pip3 uninstall {{package}}`
+
+- Save the list of installed packages to a file:
+
+`pip3 freeze > {{requirements.txt}}`
+
+- Install packages from a file:
+
+`pip3 install --requirement {{requirements.txt}}`
+
+- Show installed package info:
+
+`pip3 show {{package}}`