def latest_requirements_revision():
 return local('hg log -r :. --template "{node|short}\n" scripts/prod-requirements.txt | tail -n 1', capture=True)

def latest_requirements_revision ( ) : return local ( 'hg log -r :. --template "{node|short}\n" scripts/prod-requirements.txt | tail -n 1' , capture = True )
return the revision id of the last change to the prod-requirements file .