diff --git a/.github/workflows/python-publish.yml b/.github/workflows/python-publish.yml
new file mode 100644
index 0000000..ec70354
--- /dev/null
+++ b/.github/workflows/python-publish.yml
@@ -0,0 +1,39 @@
+# This workflow will upload a Python Package using Twine when a release is created
+# For more information see: https://help.github.com/en/actions/language-and-framework-guides/using-python-with-github-actions#publishing-to-package-registries
+
+# This workflow uses actions that are not certified by GitHub.
+# They are provided by a third-party and are governed by
+# separate terms of service, privacy policy, and support
+# documentation.
+
+name: Upload Python Package
+
+on:
+  release:
+    types: [published]
+
+permissions:
+  contents: read
+
+jobs:
+  deploy:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v3
+    - name: Set up Python
+      uses: actions/setup-python@v3
+      with:
+        python-version: '3.x'
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install build
+    - name: Build package
+      run: python -m build
+    - name: Publish package
+      uses: pypa/gh-action-pypi-publish@27b31702a0e7fc50959f5ad993c78deac1bdfc29
+      with:
+        user: __token__
+        password: ${{ secrets.PYPI_API_TOKEN }}
diff --git a/main.py b/main.py
index 991edee..3f7c726 100644
--- a/main.py
+++ b/main.py
@@ -1,5 +1,10 @@
+from converter import dec_to_bin, bin_to_dec
+
+
 def say_hello():
-    print("Say Hello !")
+    print("Hello")
+
 
 if __name__ == '__main__':
-    say_hello()
\ No newline at end of file
+    print(*dec_to_bin(256))
+    print(bin_to_dec([1, 0, 1, 0, 0, 1]))
\ No newline at end of file
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..888412f
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,22 @@
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
+
+[project]
+name = "converter_package_Louise"
+version = "0.0.1"
+authors = [
+  { name="Louise", email="author@example.com" },
+]
+description = "A small example package"
+readme = "README.md"
+requires-python = ">=3.7"
+classifiers = [
+    "Programming Language :: Python :: 3",
+    "License :: OSI Approved :: MIT License",
+    "Operating System :: OS Independent",
+]
+
+[project.urls]
+"Homepage" = "https://github.com/Lou13213/M1-2022-git-workflow"
+"Bug Tracker" = "https://github.com/Lou13213/M1-2022-git-workflow/issues"
diff --git a/src/converter_package_Louise/__init__.py b/src/converter_package_Louise/__init__.py
new file mode 100644
index 0000000..8b13789
--- /dev/null
+++ b/src/converter_package_Louise/__init__.py
@@ -0,0 +1 @@
+
diff --git a/src/converter_package_Louise/converter.py b/src/converter_package_Louise/converter.py
new file mode 100644
index 0000000..5735f4e
--- /dev/null
+++ b/src/converter_package_Louise/converter.py
@@ -0,0 +1,35 @@
+from typing import List
+
+
+def dec_to_bin(n: int) -> List[int]:
+    """
+    Converts a positive integer to binary
+    :param n: int, decimal integer to convert to binary
+    :return: Binary translation of input number, as a list of 0s and 1
+    """
+    if n < 0:
+        raise ValueError("n should be positive")
+
+    bit = [0 if n % 2 == 0 else 1]
+    return bit if n <= 1 else dec_to_bin(n >> 1) + bit
+
+
+def bin_to_dec(bits_array: List[int]) -> int:
+    """
+    Converts a list of 0s and 1s to its corresponding decimal representation
+    :param bits_array: list of 0s and 1s to convert
+    :return: int
+    """
+    if not inputs_is_bits(bits_array):
+        raise ValueError("input should contain only bits (0 or 1)")
+
+    ba = bits_array.copy()
+    ba.reverse()
+    return sum([(1 << i) * m for i, m in enumerate(ba)])
+
+
+def inputs_is_bits(bits_array):
+    for b in bits_array:
+        if b not in [0, 1]:
+            return False
+    return True
diff --git a/test/__init__.py b/test/__init__.py
new file mode 100644
index 0000000..8b13789
--- /dev/null
+++ b/test/__init__.py
@@ -0,0 +1 @@
+
diff --git a/test_converter.py b/test_converter.py
new file mode 100644
index 0000000..b16992d
--- /dev/null
+++ b/test_converter.py
@@ -0,0 +1,29 @@
+from unittest import TestCase
+
+from src.converter_package_Louise.converter import dec_to_bin, bin_to_dec
+
+
+class TestConverter(TestCase):
+    def test_dec_to_bin_even(self):
+        n = 10
+        expected = [1, 0, 1, 0]
+        self.assertListEqual(expected, dec_to_bin(n))
+
+    def test_dec_to_bin_odd(self):
+        n = 37
+        expected = [1, 0, 0, 1, 0, 1]
+        self.assertListEqual(expected, dec_to_bin(n))
+
+    def test_bin_to_dec_odd(self):
+        bits = [1, 0, 0, 1, 0, 1]
+        expected = 37
+        self.assertEqual(expected, bin_to_dec(bits))
+
+    def test_bin_to_dec_even(self):
+        bits = [1, 0, 1, 0]
+        expected = 10
+        self.assertEqual(expected, bin_to_dec(bits))
+
+    def test_reverse(self):
+        n = 135
+        self.assertEqual(n, bin_to_dec(dec_to_bin(n)))