Merge pull request #1755 from hroff-1902/scripts-get_market_pairs

Minor: impoved argument and exception handling in scripts

scripts/download_backtest_data.py

@@ -1,6 +1,7 @@
 #!/usr/bin/env python3
-
-"""This script generate json data"""
+"""
+This script generates json data
+"""
 import json
 import sys
 from pathlib import Path
@@ -35,7 +36,7 @@ if args.config:
     config: Dict[str, Any] = {}
     # Now expecting a list of config filenames here, not a string
     for path in args.config:
-        print('Using config: %s ...', path)
+        print(f"Using config: {path}...")
         # Merge config options, overwriting old values
         config = deep_merge_dicts(configuration._load_config_file(path), config)
 
@@ -44,7 +45,8 @@ if args.config:
     config['exchange']['key'] = ''
     config['exchange']['secret'] = ''
 else:
-    config = {'stake_currency': '',
+    config = {
+        'stake_currency': '',
         'dry_run': True,
         'exchange': {
             'name': args.exchange,
@@ -52,7 +54,7 @@ else:
             'secret': '',
             'pair_whitelist': [],
             'ccxt_async_config': {
-                      "enableRateLimit": False
+                'enableRateLimit': False
             }
         }
     }

scripts/get_market_pairs.py

@@ -4,6 +4,7 @@ https://github.com/ccxt/ccxt/blob/master/examples/py/arbitrage-pairs.py
 """
 import os
 import sys
+import traceback
 
 root = os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
 sys.path.append(root + '/python')
@@ -53,6 +54,11 @@ def print_supported_exchanges():
 
 try:
 
+    if len(sys.argv) < 2:
+        dump("Usage: python " + sys.argv[0], green('id'))
+        print_supported_exchanges()
+        sys.exit(1)
+
     id = sys.argv[1]  # get exchange id from command line arguments
 
     # check if the exchange is supported by ccxt
@@ -91,5 +97,7 @@ try:
 
 except Exception as e:
     dump('[' + type(e).__name__ + ']', str(e))
+    dump(traceback.format_exc())
     dump("Usage: python " + sys.argv[0], green('id'))
     print_supported_exchanges()
+    sys.exit(1)