Add some type hints

freqtrade/commands/data_commands.py

@@ -1,6 +1,6 @@
 import logging
 import sys
-from typing import Any, Dict, List
+from typing import Any, Dict, List, cast
 
 import arrow
 
@@ -43,16 +43,18 @@ def start_download_data(args: Dict[str, Any]) -> None:
         if config.get('download_trades'):
             pairs_not_available = refresh_backtest_trades_data(
                 exchange, pairs=config["pairs"], datadir=config['datadir'],
-                timerange=timerange, erase=config.get("erase"))
+                timerange=timerange, erase=cast(bool, config.get("erase")))
 
             # Convert downloaded trade data to different timeframes
             convert_trades_to_ohlcv(
                 pairs=config["pairs"], timeframes=config["timeframes"],
-                datadir=config['datadir'], timerange=timerange, erase=config.get("erase"))
+                datadir=config['datadir'], timerange=timerange,
+                erase=cast(bool, config.get("erase")))
         else:
             pairs_not_available = refresh_backtest_ohlcv_data(
                 exchange, pairs=config["pairs"], timeframes=config["timeframes"],
-                datadir=config['datadir'], timerange=timerange, erase=config.get("erase"))
+                datadir=config['datadir'], timerange=timerange,
+                erase=cast(bool, config.get("erase")))
 
     except KeyboardInterrupt:
         sys.exit("SIGINT received, aborting ...")

freqtrade/commands/deploy_commands.py

@@ -28,7 +28,7 @@ def start_create_userdir(args: Dict[str, Any]) -> None:
         sys.exit(1)
 
 
-def deploy_new_strategy(strategy_name, strategy_path: Path, subtemplate: str):
+def deploy_new_strategy(strategy_name: str, strategy_path: Path, subtemplate: str) -> None:
     """
     Deploy new strategy from template to strategy_path
     """
@@ -69,7 +69,7 @@ def start_new_strategy(args: Dict[str, Any]) -> None:
         raise OperationalException("`new-strategy` requires --strategy to be set.")
 
 
-def deploy_new_hyperopt(hyperopt_name, hyperopt_path: Path, subtemplate: str):
+def deploy_new_hyperopt(hyperopt_name: str, hyperopt_path: Path, subtemplate: str) -> None:
     """
     Deploys a new hyperopt template to hyperopt_path
     """

freqtrade/commands/plot_commands.py

@@ -5,7 +5,7 @@ from freqtrade.exceptions import OperationalException
 from freqtrade.state import RunMode
 
 
-def validate_plot_args(args: Dict[str, Any]):
+def validate_plot_args(args: Dict[str, Any]) -> None:
     if not args.get('datadir') and not args.get('config'):
         raise OperationalException(
             "You need to specify either `--datadir` or `--config` "