Add helper scripts for getting exchange rates

contrib/scripts/merge_exchange_records.py

@@ -0,0 +1,65 @@
+import sys
+
+import yaml
+
+
+def load_yaml(filename):
+    with open(filename, "r", encoding="utf-8") as file:
+        return yaml.safe_load(file) or []
+
+
+def save_yaml(filename, data):
+    with open(filename, "w", encoding="utf-8") as file:
+        yaml.safe_dump(data, file, allow_unicode=True, default_flow_style=False)
+
+
+def extract_existing_combinations(data):
+    return {
+        (
+            entry["fields"]["currency_from"],
+            entry["fields"]["currency_to"],
+            entry["fields"]["year"],
+        )
+        for entry in data
+        if entry["model"] == "games.exchangerate"
+    }
+
+
+def filter_new_entries(existing_combinations, additional_files):
+    new_entries = []
+
+    for filename in additional_files:
+        data = load_yaml(filename)
+        for entry in data:
+            if entry["model"] == "games.exchangerate":
+                key = (
+                    entry["fields"]["currency_from"],
+                    entry["fields"]["currency_to"],
+                    entry["fields"]["year"],
+                )
+                if key not in existing_combinations:
+                    new_entries.append(entry)
+
+    return new_entries
+
+
+def main():
+    if len(sys.argv) < 3:
+        print("Usage: script.py example.yaml additions1.yaml [additions2.yaml ...]")
+        sys.exit(1)
+
+    example_file = sys.argv[1]
+    additional_files = sys.argv[2:]
+    output_file = "filtered_output.yaml"
+
+    existing_data = load_yaml(example_file)
+    existing_combinations = extract_existing_combinations(existing_data)
+
+    new_entries = filter_new_entries(existing_combinations, additional_files)
+
+    save_yaml(output_file, new_entries)
+    print(f"Filtered data saved to {output_file}")
+
+
+if __name__ == "__main__":
+    main()