Make mypy happy

2019-12-16 23:25:57 +03:00 · 2019-12-16 23:25:57 +03:00 · 0277cd82ea
commit 0277cd82ea
parent a6fc743d85
1 changed files with 5 additions and 0 deletions
--- a/freqtrade/data/history.py
+++ b/freqtrade/data/history.py
@ -295,6 +295,11 @@ def _download_pair_history(datadir: Path,
    :param timerange: range of time to download
    :return: bool with success state
    """
+    if not exchange:
+        raise OperationalException(
+            "Exchange needs to be initialized when downloading pair history data"
+        )
+
    try:
        logger.info(
            f'Download history data for pair: "{pair}", timeframe: {timeframe} '