make backward compatible with 3 < Python < 3.6

github_updater.py

@@ -1,17 +1,16 @@
 import os
+import requests
 import shutil
 import tempfile
 import zipfile
 
-import requests
-
 
 class GithubUpdater:
     """
     Interface for obtaining latest source codes from GitHub repository
     """
 
-    def __init__(self, repo_owner: str, repo_name: str):
+    def __init__(self, repo_owner, repo_name):  # type: (str, str) -> None
         """
         Initializes the GitHub updater
         :param repo_owner: owner of the GitHub repository to update from
@@ -20,21 +19,21 @@ def __init__(self, repo_owner: str, repo_name: str):
         self.url_release = "https://api.github.com/repos/%s/%s/releases/latest" % (repo_owner, repo_name)
         self.url_master_zip = "https://github.com/%s/%s/archive/master.zip" % (repo_owner, repo_name)
 
-    def get_latest_release_data(self) -> dict:
+    def get_latest_release_data(self):  # type: () -> dict
         """
         Uses GitHub API to obtain all data about latest release and return them as a dict
         :return: all data about latest release and as a dict
         """
         return requests.get(self.url_release).json()
 
-    def get_latest_release_tag(self) -> str:
+    def get_latest_release_tag(self):  # type: () -> str
         """
         Fetches the tag of the latest release
         :return: the tag of the latest release from GitHub repository
         """
         return self.get_latest_release_data()['tag_name']
 
-    def get_latest_release_zip(self, target_file: str) -> None:
+    def get_latest_release_zip(self, target_file):  # type: (str) -> None
         """
         Downloads the zip with a source code of the latest release from GitHub
         :param target_file: where to download the zip file to
@@ -46,7 +45,7 @@ def get_latest_release_zip(self, target_file: str) -> None:
                 if chunk:
                     f.write(chunk)
 
-    def get_master(self, target_file: str) -> None:
+    def get_master(self, target_file):  # type: (str) -> None
         """
         Downloads the current master branch as a zip file
         :param target_file: where to download the master branch zip file to
@@ -58,7 +57,7 @@ def get_master(self, target_file: str) -> None:
                 if chunk:
                     f.write(chunk)
 
-    def get_and_extract_newest_release_to_directory(self, target_directory: str) -> None:
+    def get_and_extract_newest_release_to_directory(self, target_directory):  # type: (str) -> None
         """
         Downloads and extracts newest release to specified directory
         :param target_directory: here will be the code of the newest release placed
@@ -68,7 +67,7 @@ def get_and_extract_newest_release_to_directory(self, target_directory: str) ->
         self.get_latest_release_zip(zip_file)
         self._extract_zip(zip_file, target_directory)
 
-    def extract_master(self, target_directory: str) -> None:
+    def extract_master(self, target_directory):  # type: (str) -> None
         """
         Downloads and extracts code from master branch to specified directory
         :param target_directory: here will be the code from master branch placed
@@ -79,7 +78,7 @@ def extract_master(self, target_directory: str) -> None:
         self._extract_zip(zip_file, target_directory)
 
     @staticmethod
-    def _extract_zip(zip_path: str, target_directory: str) -> None:
+    def _extract_zip(zip_path, target_directory):  # type: (str, str) -> None
         """
         Extract zip with source code to target directory and deletes the zip file
         :param zip_path: zip file to be extracted