For example,
With range time:
g = git.Git("C:/path/to/your/repo")
loginfo = g.log('--since=2013-09-01','--author=KIM BASINGER','--pretty=tformat:','--numstat')
print loginfo
Output:
3 2 path/in/your/solutions/some_file.cs
You can see the added lines, removed lines and the file with these changes.