Describe license scan python limitations

doc/user/compliance/license_compliance/index.md

@@ -53,7 +53,7 @@ The following languages and package managers are supported.
 | Go         | [Godep](https://github.com/tools/godep), go get ([experimental support](https://github.com/pivotal/LicenseFinder#experimental-project-types)), gvt ([experimental support](https://github.com/pivotal/LicenseFinder#experimental-project-types)), glide ([experimental support](https://github.com/pivotal/LicenseFinder#experimental-project-types)), dep ([experimental support](https://github.com/pivotal/LicenseFinder#experimental-project-types)), trash ([experimental support](https://github.com/pivotal/LicenseFinder#experimental-project-types)) and govendor ([experimental support](https://github.com/pivotal/LicenseFinder#experimental-project-types)), [go mod](https://github.com/golang/go/wiki/Modules) ([experimental support](https://github.com/pivotal/LicenseFinder#experimental-project-types))   |[License Finder](https://github.com/pivotal/LicenseFinder)|
 | Java       | [Gradle](https://gradle.org/), [Maven](https://maven.apache.org/) |[License Finder](https://github.com/pivotal/LicenseFinder)|
 | .NET      | [Nuget](https://www.nuget.org/) (.NET Framework is supported via the [mono project](https://www.mono-project.com/). Windows specific dependencies are not supported at this time.)  |[License Finder](https://github.com/pivotal/LicenseFinder)|
-| Python     | [pip](https://pip.pypa.io/en/stable/)                             |[License Finder](https://github.com/pivotal/LicenseFinder)|
+| Python     | [pip](https://pip.pypa.io/en/stable/) (Python is supported through [requirements.txt](https://pip.readthedocs.io/en/1.1/requirements.html) and [Pipfile.lock](https://github.com/pypa/pipfile#pipfilelock).) |[License Finder](https://github.com/pivotal/LicenseFinder)|
 | Ruby       | [gem](https://rubygems.org/)                                      |[License Finder](https://github.com/pivotal/LicenseFinder)|
 | Erlang     | [rebar](https://www.rebar3.org/) ([experimental support](https://github.com/pivotal/LicenseFinder#experimental-project-types))|[License Finder](https://github.com/pivotal/LicenseFinder)|
 | Objective-C, Swift | [Carthage](https://github.com/Carthage/Carthage) , [CocoaPods v0.39 and below](https://cocoapods.org/) ([experimental support](https://github.com/pivotal/LicenseFinder#experimental-project-types))  |[License Finder](https://github.com/pivotal/LicenseFinder)|