scikit-learn · rth · Jun 25, 2020 · Apr 26, 2020 · Apr 26, 2020 · Apr 26, 2020
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
@@ -14,7 +14,7 @@ repos:
         # the code is not fully PEP8 compatible
         args: [--select=F401]
 -   repo: https://github.com/pre-commit/mirrors-mypy
-    rev: v0.730
+    rev: v0.780
     hooks:
      -  id: mypy
         args:

diff --git a/azure-pipelines.yml b/azure-pipelines.yml
@@ -17,7 +17,7 @@ jobs:
       inputs:
         versionSpec: '3.8'
     - bash: |
-        pip install flake8 mypy==0.770
+        pip install flake8 mypy==0.780
       displayName: Install linters
     - bash: |
         set -ex

diff --git a/sklearn/datasets/_base.py b/sklearn/datasets/_base.py
@@ -27,7 +27,7 @@
                                 ['filename', 'url', 'checksum'])
 
 
-def get_data_home(data_home=None):
+def get_data_home(data_home=None) -> str:
     """Return the path of the scikit-learn data dir.
 
     This folder is used by some large dataset loaders to avoid downloading the