diff --git a/tooling/.gitignore b/tooling/.gitignore
new file mode 100644
index 0000000..2a585e0
--- /dev/null
+++ b/tooling/.gitignore
@@ -0,0 +1,3 @@
+.venv/
+__pycache__/
+*.pyc
\ No newline at end of file
diff --git a/tooling/demo1_venv.py b/tooling/demo1_venv.py
new file mode 100644
index 0000000..ac81635
--- /dev/null
+++ b/tooling/demo1_venv.py
@@ -0,0 +1,6 @@
+import sys
+
+print("Python Interpreter:")
+print(sys.executable)
+
+print("\n.venv -> virtuelle Umgebung aktiv")
diff --git a/tooling/demo2_ruff.py b/tooling/demo2_ruff.py
new file mode 100644
index 0000000..538eb4c
--- /dev/null
+++ b/tooling/demo2_ruff.py
@@ -0,0 +1,7 @@
+import math
+
+name = "Max"
+
+print(nam)
+
+# terminal -> ruff check . -> ruff check . --fix
diff --git a/tooling/demo3_formatting.py b/tooling/demo3_formatting.py
new file mode 100644
index 0000000..25fcff5
--- /dev/null
+++ b/tooling/demo3_formatting.py
@@ -0,0 +1,6 @@
+from src.calculator import add
+
+print("Manueller Test: ")
+print(add(2, 3))
+
+# Terminal -> pytest
diff --git a/tooling/pyproject.toml b/tooling/pyproject.toml
new file mode 100644
index 0000000..e3d1ef6
--- /dev/null
+++ b/tooling/pyproject.toml
@@ -0,0 +1,5 @@
+[tool.ruff]
+line-length = 88
+
+[tool.pytest.ini_options]
+testpaths = ["tests"]
\ No newline at end of file
diff --git a/tooling/src/calculator.py b/tooling/src/calculator.py
new file mode 100644
index 0000000..e00a52c
--- /dev/null
+++ b/tooling/src/calculator.py
@@ -0,0 +1,8 @@
+def multiply(a, b):
+    return a * b
+
+
+x = [1, 2, 3]
+print(x)
+
+#Terminal -> ruff format .
\ No newline at end of file
diff --git a/tooling/tests/test_calculator.py b/tooling/tests/test_calculator.py
new file mode 100644
index 0000000..83e349e
--- /dev/null
+++ b/tooling/tests/test_calculator.py
@@ -0,0 +1,9 @@
+from src.calculator import add, subtract
+
+
+def test_add():
+    assert add(2, 3) == 5
+
+
+def test_substract():
+    assert subtract(5, 2) == 3