Merge pull request #418 from zhengqm/change_format

Change format of package name and version in pip

pages/common/pip.md

@@ -4,19 +4,19 @@
 
 - Install a package
 
-`pip install {{somepackage}}`
+`pip install {{package_name}}`
 
 - Install a specific version of a package
 
-`pip install {{somepackage}}=={{someversion}}`
+`pip install {{package_name}}=={{package_version}}`
 
 - Upgrade a package
 
-`pip install -U {{somepackage}}`
+`pip install -U {{package_name}}`
 
 - Uninstall a package
 
-`pip uninstall {{somepackage}}`
+`pip uninstall {{package_name}}`
 
 - Save installed packages to file