diff --git a/saison-2/sources/todo/todo.py b/saison-2/sources/todo/todo.py
new file mode 100644
index 0000000..6d2f8e6
--- /dev/null
+++ b/saison-2/sources/todo/todo.py
@@ -0,0 +1,61 @@
+class Todo:
+    def __init__(self, contents, done):
+        self.contents = contents
+        self.done = done
+
+
+class TodoList:
+    def __init__(self):
+        self.todos = []
+
+    def add(self, contenu):
+        self.todos.append(Todo(contenu, False))
+
+    def mark_as_done(self, i):
+        self.todos[i - 1].done = True
+
+    def mark_as_not_done(self, i):
+        self.todos[i - 1].done = False
+
+    def show(self):
+        if not self.todos:
+            print("nothing yet")
+        i = 1
+        for todo in self.todos:
+            if todo.done:
+                print(i, "[x]", todo.contents)
+            else:
+                print(i, "[ ]", todo.contents)
+            i += 1
+
+
+def parse_answer(answer):
+    if answer.startswith("+ "):
+        return "add", answer[2:]
+    if answer.startswith("- "):
+        return "remove", int(answer[2:])
+    if answer.startswith("x "):
+        return "done", int(answer[2:])
+    if answer.startswith("o "):
+        return "undo", int(answer[2:])
+    return "error", ""
+
+
+def main():
+    todo_list = TodoList()
+    while True:
+        todo_list.show()
+        answer = input("+ / x / o ?\n")
+        command, arg = parse_answer(answer)
+        if command == "add":
+            todo_list.add(arg)
+        if command == "done":
+            todo_list.mark_as_done(arg)
+        if command == "undo":
+            todo_list.mark_as_not_done(arg)
+        if command == "error":
+            print("error")
+
+
+if __name__ == "__main__":
+    main()