From edd1f03a0246e9ab3436a4fc0b17b704ceadcc1a Mon Sep 17 00:00:00 2001
From: Christian Clauss <cclauss@me.com>
Date: Fri, 19 Mar 2021 10:50:37 +0100
Subject: [PATCH 1/5] Add GitHub Action mypy.yml

---
 .github/workflows/mypy.yml | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 .github/workflows/mypy.yml

diff --git a/.github/workflows/mypy.yml b/.github/workflows/mypy.yml
new file mode 100644
index 000000000000..188bc15373db
--- /dev/null
+++ b/.github/workflows/mypy.yml
@@ -0,0 +1,25 @@
+name: mypy
+
+on: [push, pull_request]
+
+jobs:
+  pre-commit:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - run: python3 -m pip install mypy
+      - run: python3 -m  mypy --ignore-missing-imports \
+          arithmetic_analysis \
+          backtracking \
+          bit_manipulation \
+          blockchain \
+          boolean_algebra \
+          cellular_automata \
+          computer_vision \
+          digital_image_processing \
+          fuzzy_logic \
+          genetic_algorithm \
+          geodesy \
+          knapsack \
+          networking_flow \
+          scheduling sorts

From d31fdcb5c4fc618ab06a882d119a913e187de313 Mon Sep 17 00:00:00 2001
From: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>
Date: Fri, 19 Mar 2021 09:51:11 +0000
Subject: [PATCH 2/5] updating DIRECTORY.md

---
 DIRECTORY.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/DIRECTORY.md b/DIRECTORY.md
index dfb673dea829..136825e41976 100644
--- a/DIRECTORY.md
+++ b/DIRECTORY.md
@@ -472,6 +472,7 @@
   * [Runge Kutta](https://github.com/TheAlgorithms/Python/blob/master/maths/runge_kutta.py)
   * [Segmented Sieve](https://github.com/TheAlgorithms/Python/blob/master/maths/segmented_sieve.py)
   * Series
+    * [Arithmetic Mean](https://github.com/TheAlgorithms/Python/blob/master/maths/series/arithmetic_mean.py)
     * [Geometric Mean](https://github.com/TheAlgorithms/Python/blob/master/maths/series/geometric_mean.py)
     * [Geometric Series](https://github.com/TheAlgorithms/Python/blob/master/maths/series/geometric_series.py)
     * [Harmonic Series](https://github.com/TheAlgorithms/Python/blob/master/maths/series/harmonic_series.py)

From 6ff1d8c9b816823291cf6d0e371cc36322f7d910 Mon Sep 17 00:00:00 2001
From: Christian Clauss <cclauss@me.com>
Date: Fri, 19 Mar 2021 10:53:17 +0100
Subject: [PATCH 3/5] Update mypy.yml

---
 .github/workflows/mypy.yml | 30 +++++++++++++++---------------
 1 file changed, 15 insertions(+), 15 deletions(-)

diff --git a/.github/workflows/mypy.yml b/.github/workflows/mypy.yml
index 188bc15373db..63db18e3c0ba 100644
--- a/.github/workflows/mypy.yml
+++ b/.github/workflows/mypy.yml
@@ -3,23 +3,23 @@ name: mypy
 on: [push, pull_request]
 
 jobs:
-  pre-commit:
+  mypy:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
       - run: python3 -m pip install mypy
-      - run: python3 -m  mypy --ignore-missing-imports \
-          arithmetic_analysis \
-          backtracking \
-          bit_manipulation \
-          blockchain \
-          boolean_algebra \
-          cellular_automata \
-          computer_vision \
-          digital_image_processing \
-          fuzzy_logic \
-          genetic_algorithm \
-          geodesy \
-          knapsack \
-          networking_flow \
+      - run: python3 -m  mypy --ignore-missing-imports
+          arithmetic_analysis
+          backtracking
+          bit_manipulation
+          blockchain
+          boolean_algebra
+          cellular_automata
+          computer_vision
+          digital_image_processing
+          fuzzy_logic
+          genetic_algorithm
+          geodesy
+          knapsack
+          networking_flow
           scheduling sorts

From 9740873df702de08b3626d09acc1eb9c3c0c656a Mon Sep 17 00:00:00 2001
From: Christian Clauss <cclauss@me.com>
Date: Fri, 19 Mar 2021 10:55:35 +0100
Subject: [PATCH 4/5] Update mypy.yml

---
 .github/workflows/mypy.yml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/.github/workflows/mypy.yml b/.github/workflows/mypy.yml
index 63db18e3c0ba..54d9c16bb99a 100644
--- a/.github/workflows/mypy.yml
+++ b/.github/workflows/mypy.yml
@@ -8,6 +8,7 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - run: python3 -m pip install mypy
+      # FIXME: fix mypy errors in other directories and add them here
       - run: python3 -m  mypy --ignore-missing-imports
           arithmetic_analysis
           backtracking

From 710fd8ffc66d6a66e4a33d4e27d146bee593ff2e Mon Sep 17 00:00:00 2001
From: Christian Clauss <cclauss@me.com>
Date: Fri, 19 Mar 2021 11:26:19 +0100
Subject: [PATCH 5/5] Update mypy.yml

---
 .github/workflows/mypy.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/mypy.yml b/.github/workflows/mypy.yml
index 54d9c16bb99a..78badf82b586 100644
--- a/.github/workflows/mypy.yml
+++ b/.github/workflows/mypy.yml
@@ -8,7 +8,7 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - run: python3 -m pip install mypy
-      # FIXME: fix mypy errors in other directories and add them here
+      # FIXME: #4052 fix mypy errors in other directories and add them here
       - run: python3 -m  mypy --ignore-missing-imports
           arithmetic_analysis
           backtracking