Fix mypy issues

pydriller/domain/commit.py

@@ -27,7 +27,8 @@
 
 import lizard
 import lizard_languages
-from git import Diff, Git, Commit as GitCommit, NULL_TREE
+from git import Diff, Git, NULL_TREE
+from git.objects import Commit as GitCommit
 
 from pydriller.domain.developer import Developer
 
@@ -577,7 +578,7 @@ def author_timezone(self) -> int:
 
         :return: int timezone
         """
-        return self._c_object.author_tz_offset
+        return int(self._c_object.author_tz_offset)
 
     @property
     def committer_timezone(self) -> int:
@@ -586,7 +587,7 @@ def committer_timezone(self) -> int:
 
         :return: int timezone
         """
-        return self._c_object.committer_tz_offset
+        return int(self._c_object.committer_tz_offset)
 
     @property
     def msg(self) -> str:
@@ -595,7 +596,7 @@ def msg(self) -> str:
 
         :return: str commit_message
         """
-        return self._c_object.message.strip()
+        return str(self._c_object.message.strip())
 
     @property
     def parents(self) -> List[str]:

pydriller/domain/developer.py

@@ -21,7 +21,7 @@ class Developer:
     This class represents a developer. We save the email and the name.
     """
 
-    def __init__(self, name: str, email: str):
+    def __init__(self, name: str = None, email: str = None):
         """
         Class to identify a developer.
 

pydriller/git.py

@@ -21,7 +21,8 @@
 from pathlib import Path
 from typing import List, Dict, Set, Generator
 
-from git import Repo, GitCommandError, Commit as GitCommit
+from git import Repo, GitCommandError
+from git.objects import Commit as GitCommit
 
 from pydriller.domain.commit import Commit, ModificationType, ModifiedFile
 from pydriller.utils.conf import Conf
@@ -68,6 +69,9 @@ def repo(self) -> Repo:
         """
         if self._repo is None:
             self._open_repository()
+
+        assert self._repo
+
         return self._repo
 
     def clear(self):

tests/test_git_repository.py

@@ -171,7 +171,6 @@ def test_checkout_with_commit_not_fully_merged_to_master(repo: Git):
     assert len(files1) == 2
 
     repo.reset()
-    assert 4, "temp branch should be cleared." == len(repo.repo.branches)
     files2 = repo.files()
     assert len(files2) == 1