.pre-commit-config.yaml

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+repos:
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v4.5.0
+    hooks:
+      - id: trailing-whitespace
+      - id: end-of-file-fixer
+      - id: check-yaml
+      - id: check-added-large-files
+
+  - repo: https://github.com/astral-sh/ruff-pre-commit
+    rev: v0.3.0
+    hooks:
+      - id: ruff   # Linting
+
+  - repo: https://github.com/psf/black
+    rev: stable
+    hooks:
+      - id: black  # formatting

src/codewars/counting_duplicates.py

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+# Abgabe - Counting Duplicates Aufgabe von Codewars
+# Link dazu: https://www.codewars.com/kata/54bf1c2cd5b56cc47f0007a1
+# Leart Ramushi
+
+
+def duplicate_count(text):
+    lower_text = text.lower()
+    letter_set = set()
+
+    for i in range(len(lower_text)):
+        if lower_text.count(lower_text[i]) > 1:
+            letter_set.add(lower_text[i])
+
+    return len(letter_set)

src/moduleA.py

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+def addition(a=1, b=2):
+    return a + b
+
+
+def f(x: int, y: int) -> int:
+    return x + y
+
+
+if __name__ == "__main__":
+    print(addition(5, 5))

tests/test_moduleA.py

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+from src.moduleA import addition
+
+
+def test_a():
+    assert addition() == 3
+    assert addition(5, 5) == 10