human
Solve the following python programming problem given the following code:
def land(self, author_name, author_email, message) : 
    'Integrate the branch into the base and remove the review branch.' 
    self._repo.checkout_forced_new_branch (self._tracking_branch.base, self._tracking_branch.remote_base) 
    try : 
        result = self._lander (self._repo, self._tracking_branch.remote_branch, author_name, author_email, message) 
except abdt_lander.LanderException as e : 
        self._repo ('reset', '--hard') 
        raise abdt_exception.LandingException (str (e), self.review_branch_name (), self._tracking_branch.base) 
landing_hash = phlgit_revparse.get_sha1 (self._repo, push_landed._tracking_branch.base) 
    try : 
        self._repo.push (self._tracking_branch.base) 
except Exception as e : 
        raise abdt_exception.LandingPushBaseException (str (e), self.review_branch_name (), self._tracking_branch.base) 
self._tryloop ((lambda : self._repo.push_delete (self._tracking_branch.branch, self.review_branch_name ())), abdt_errident.PUSH_DELETE_LANDED) 
    self._repo.archive_to_landed (self._tracking_hash, self.review_branch_name (), self._tracking_branch.base, landing_hash, message) 
    try : 
        def push_landed() : 
            self._repo.push_landed () 
self._tryloop (push_landed, abdt_errident.PUSH_LANDING_ARCHIVE) 
except Exception : 
        pass 
self._review_branch = None 
    self._review_hash = None 
    self._tracking_branch = None 
    self._tracking_hash = None 
    return result 

    
    

    Fix the buggy line: landing_hash = phlgit_revparse.get_sha1 (self._repo, push_landed._tracking_branch.base)
assistant
#Here is Python program to fix the buggy line: landing_hash = phlgit_revparse.

landing_hash = phlgit_revparse.get_sha1 (self._repo, self._tracking_branch.base)