Improved quantize script

I improved the quantize script by adding error handling and allowing to select many models for quantization at once in the command line. I also converted it to Python for generalization as well as extensibility.

quantize.py

@@ -0,0 +1,59 @@
+#!/usr/bin/python3
+
+"""Script to execute quantization on a given model."""
+
+import subprocess
+import argparse
+import sys
+import os
+
+
+def main():
+    """Parse the command line arguments and execute the script."""
+
+    parser = argparse.ArgumentParser(
+        prog='Quantization Script',
+        description='This script quantizes a model.'
+    )
+
+    parser.add_argument("models", nargs='+', dest='models')
+    parser.add_argument(
+        '-r', '--remove-16', action='store_true', dest='remove_f16',
+        help='Remove the f16 model after quantizing it.'
+    )
+
+    args = parser.parse_args()
+
+    for model in args.models:
+
+        model_path = os.path.join("models", model, "ggml-model-f16.bin")
+
+        for i in os.listdir(model_path):
+            subprocess.run(
+                ["./quantize", i, i.replace("f16", "q4_0"), "2"],
+                shell=True,
+                check=True
+            )
+
+            if args.remove_f16:
+                os.remove(i)
+
+
+if __name__ == "__main__":
+    try:
+        main()
+
+    except subprocess.CalledProcessError:
+        print("An error ocurred while trying to quantize the models.")
+        sys.exit(1)
+
+    except FileNotFoundError as err:
+        print(
+            f'A FileNotFoundError exception was raised while executing the \
+            script:\n{err}\nMake sure you are located in the root of the \
+            repository and that the models are in the "models" directory.'
+        )
+        sys.exit(1)
+
+    except KeyboardInterrupt:
+        sys.exit(0)