list-exchanges subcommand added

freqtrade/utils.py

@@ -0,0 +1,44 @@
+import logging
+from argparse import Namespace
+from typing import Any, Dict
+
+from freqtrade.configuration import Configuration
+from freqtrade.exchange import supported_exchanges
+from freqtrade.state import RunMode
+
+
+logger = logging.getLogger(__name__)
+
+
+def setup_configuration(args: Namespace, method: RunMode) -> Dict[str, Any]:
+    """
+    Prepare the configuration for the Hyperopt module
+    :param args: Cli args from Arguments()
+    :return: Configuration
+    """
+    configuration = Configuration(args, method)
+    config = configuration.load_config()
+
+    # Ensure we do not use Exchange credentials
+    config['exchange']['key'] = ''
+    config['exchange']['secret'] = ''
+
+    return config
+
+
+def start_list_exchanges(args: Namespace) -> None:
+    """
+    Start listing known exchanges
+    :param args: Cli args from Arguments()
+    :return: None
+    """
+
+    # Initialize configuration
+    config = setup_configuration(args, RunMode.OTHER)
+
+    logger.debug('Starting freqtrade in cli-util mode')
+
+    if args.print_one_column:
+        print('\n'.join(supported_exchanges()))
+    else:
+        print(f"Supported exchanges: {', '.join(supported_exchanges())}")