Basic working implementation

main.py

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+#!./venv/bin/python
+import argparse
+
+import data
+import physics
+
+
+class Args:
+    filename: str
+    gravity: float
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser(
+        prog="n-body simulation",
+        description="Simulating gravitational effects"
+    )
+
+    parser.add_argument(
+        "-f",
+        "--filename",
+        default="data/simple.csv"
+    )
+    parser.add_argument(
+        "-g",
+        "--gravity",
+        type=float,
+        default=1.
+    )
+
+    args: Args = parser.parse_args()
+
+    physics.G = args.gravity
+
+    objects = data.parse_csv(args.filename)
+    a = data.Animator(*objects)
+    a.show()