additional package in requirements.txt: receiving error that explicitly asked...

additional package in requirements.txt: receiving error that explicitly asked for this package to be installed

requirements.txt

@@ -22,6 +22,7 @@ gunicorn==19.6.0
 Markdown==2.6.5
 mccabe==0.3.1
 MySQL-python==1.2.5
+mysqlclient==1.3.12
 oauthlib==2.0.0
 pep8==1.6.2
 pyflakes==1.0.0