diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..ed8ebf5
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+__pycache__
\ No newline at end of file
diff --git a/.vscode/launch.json b/.vscode/launch.json
new file mode 100644
index 0000000..7b0016e
--- /dev/null
+++ b/.vscode/launch.json
@@ -0,0 +1,12 @@
+{
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "Python: Module",
+            "type": "python",
+            "request": "launch",
+            "module": "main",
+            "justMyCode": true
+        }
+    ]
+}
\ No newline at end of file
diff --git a/ecs.py b/ecs.py
new file mode 100644
index 0000000..8468a2e
--- /dev/null
+++ b/ecs.py
@@ -0,0 +1,57 @@
+from typing import Iterator
+
+
+class World:
+    def __init__(self):
+        self.entities: set[Entity] = set()
+        self.mapping: dict[type, set[Entity]] = {}
+
+    def query(self, *needed: type, without: tuple[type] = []) -> Iterator['Entity']:
+        if not needed:
+            for entity in self.entities:
+                for without_type in without:
+                    if without_type in entity:
+                        break
+                else:
+                    yield entity
+        else:
+            first_component = needed[0]
+            for entity in self.mapping.get(first_component, set()):
+                for component_type in needed[1:]:
+                    if entity not in self.mapping.get(component_type, set()):
+                        break
+                else:
+                    for without_type in without:
+                        if without_type in entity:
+                            break
+                    else:
+                        yield entity
+
+class Entity:
+    def __init__(self, world: World):
+        self.world = world
+        self.world.entities.add(self)
+        self.components: dict[type, object] = {}
+
+    def __getitem__(self, component_type):
+        return self.components[component_type]
+    
+    def __setitem__(self, component_type, component):
+        self.components[component_type] = component
+        self.world.mapping.setdefault(component_type, set()).add(self)
+    
+    def __delitem__(self, component_type):
+        del self.components[component_type]
+        self.world.mapping[component_type].remove(self)
+        if len(self.world.mapping[component_type]) == 0:
+            del self.world.mapping[component_type]
+          
+    def __contains__(self, component_type):
+        return component_type in self.components
+    
+    def __del__(self): # TODO: Réparer ça marche pas car il n'est pas détruit car il est toujours dans World
+        self.world.entities.remove(self)
+        for component_type in self.components:
+            self.world.mapping[component_type].remove(self)
+            if len(self.world.mapping[component_type]) == 0:
+                del self.world.mapping[component_type]
diff --git a/main.py b/main.py
new file mode 100644
index 0000000..cdc7757
--- /dev/null
+++ b/main.py
@@ -0,0 +1,49 @@
+from ecs import World, Entity
+
+# Création de composants pouvant être ajouté a des entitées
+class Name(str):
+    pass
+class Age(int):
+    pass
+
+# Création d'un monde
+world = World()
+
+# Création d'une entité
+david = Entity(world)
+david[Name] = Name("David")
+david[Age] = Age(25)
+
+# Création d'une autre entité
+fred = Entity(world)
+fred[Name] = Name("Fred")
+fred[Age] = Age(30)
+
+# Création d'une autre entité
+paul_sans_age = Entity(world)
+paul_sans_age[Name] = Name("Paul")
+
+# Création d'une autre entité
+age_tout_cour = Entity(world)
+age_tout_cour[Age] = Age(14)
+
+print("Récupération de toutes les entitées qui ont un nom")
+for entity in world.query(Name):
+    print(entity[Name])
+
+print("Récupération de toutes les entitées qui ont un age")
+for entity in world.query(Age):
+    print(entity[Age])
+
+print("Récupération de toutes les entités qui ont un nom et un age")
+for entity in world.query(Name, Age):
+    print(entity[Name], entity[Age])
+
+print("Récupération de toutes les entitées qui ont un nom mais pas d'age")
+for entity in world.query(Name, without=(Age,)):
+    print(entity[Name])
+
+print("Récupération de toutes les entités qui ont un age mais pas de nom")
+for entity in world.query(Age, without=(Name,)):
+    print(entity[Age])
+
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..e69de29