<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def commit_pushdb(self, coordinates, postscript=None):
 """Commit changes to the pushdb with a message containing the provided coordinates."""

    self.scm.commit('pants build committing publish data for push of {coordinates}'
                    '{postscript}'.format(coordinates=coordinates, postscript=postscript or ''),
                    verify=self.get_options().verify_commit)