main function added

main.py

@@ -0,0 +1,26 @@
+# main.py
+
+from scripts.convert import csv_to_parquet, json_to_parquet
+from scripts.validate import validate_file
+from utils.file_utils import create_output_dir, get_file_extension
+
+def main():
+    input_file = 'data/sample_data/sample.csv'
+    output_file = 'data/output/sample.parquet'
+
+    file_type = get_file_extension(input_file)
+    if not validate_file(input_file, file_type):
+        print("Invalid file.")
+        return
+
+    create_output_dir('data/output')
+
+    if file_type == '.csv':
+        csv_to_parquet(input_file, output_file)
+    elif file_type == '.json':
+        json_to_parquet(input_file, output_file)
+    else:
+        print("Unsupported file type.")
+
+if __name__ == "__main__":
+    main()