pip3: add page (#3210)

pages/common/pip3.md

@@ -0,0 +1,32 @@
+# pip3
+
+> Python package manager.
+> More information: <https://pip.pypa.io>.
+
+- Install a package:
+
+`pip3 install {{package_name}}`
+
+- Install a specific version of a package:
+
+`pip3 install {{package_name}}=={{package_version}}`
+
+- Upgrade a package:
+
+`pip3 install --upgrade {{package_name}}`
+
+- Uninstall a package:
+
+`pip3 uninstall {{package_name}}`
+
+- Save the list of installed packages to a file:
+
+`pip3 freeze > {{requirements.txt}}`
+
+- Install packages from a file:
+
+`pip3 install --requirements {{requirements.txt}}`
+
+- Show installed package info:
+
+`pip3 show {{package_name}}`