fixed error checking

freqtrade/data/history.py

@@ -128,9 +128,9 @@ def load_pair_history(pair: str,
                                       drop_incomplete=drop_incomplete)
     else:
         logger.warning(
-            f'No history data for pair: "{pair}", interval: {ticker_interval}. '
-            'Use --refresh-pairs-cached option or `freqtrade download-data` '
-            'script to download the data'
+            f'No history data for pair: "{pair}", interval: {ticker_interval}, in {datadir}. '
+            'Provide the correct path to datadir in config.json, or download data with '
+            '--refresh-pairs-cached option or `freqtrade download-data`. '
         )
         return None
 

freqtrade/misc.py

@@ -3,7 +3,6 @@ Various tool function for Freqtrade and scripts
 """
 import gzip
 import logging
-from os import chdir
 import re
 from datetime import datetime
 from pathlib import Path
@@ -115,23 +114,3 @@ def deep_merge_dicts(source, destination):
             destination[key] = value
 
     return destination
-
-
-def find_project_root(path=None):
-    """Locates root directory of the project.
-    Root is defined by existence of "LICENSE" and the dir 'freqtrade'.
-    :param path: pathlib.Path object, or string pointing to project root directory.
-    :return: path to project root directory
-    """
-    if path is None:
-        path = Path(__file__).parent
-    i = 0
-    try:
-        chdir(path)
-        assert Path('LICENSE').is_file() and Path('freqtrade').exists()
-    except AssertionError:
-        while i < 5 and not (Path(path, 'LICENSE').is_file() and Path(path, 'freqtrade').exists()):
-            path = Path(path).parent
-            i += 1
-    logger.info(f'project_root is {path}')
-    return path

freqtrade/plot/plotting.py

@@ -3,7 +3,7 @@ from pathlib import Path
 from typing import Any, Dict, List
 
 import pandas as pd
-
+from freqtrade import OperationalException
 from freqtrade.configuration import TimeRange
 from freqtrade.data import history
 from freqtrade.data.btanalysis import (combine_tickers_with_mean,
@@ -33,24 +33,29 @@ def init_plotscript(config):
         pairs = config["pairs"]
     else:
         pairs = config["exchange"]["pair_whitelist"]
-    assert pairs is not None, ('No pairs available in config.')
+    if pairs is None:
+        raise OperationalException('No pairs available in config.')
 
     # Set timerange to use
     timerange = TimeRange.parse_timerange(config.get("timerange"))
+    if timerange is None:
+        raise OperationalException('Could not parse timerange in config.')
 
     tickers = history.load_data(
-        datadir=Path(config.get("datadir"), config.get("exchange").get("name")),
+        datadir=Path(str(config.get("datadir"))),
         pairs=pairs,
         ticker_interval=config.get('ticker_interval', '5m'),
         timerange=timerange,
     )
-    assert tickers is not None, ('No ticker data available as specified in config.')
+    if tickers is None:
+        raise OperationalException('No ticker data available as specified in config.')
 
     trades = load_trades(config['trade_source'],
                          db_url=config.get('db_url'),
                          exportfilename=config.get('exportfilename'),
                          )
-    assert trades is not None, ('No trades available as specified in config.')
+    if trades is None:
+        raise OperationalException('No trades available as specified in config.')
 
     return {"tickers": tickers,
             "trades": trades,
@@ -342,9 +347,9 @@ def load_and_plot_trades(config: Dict[str, Any]):
 
     plot_elements = init_plotscript(config)
     trades = plot_elements['trades']
-    if trades is None:
-        raise ValueError('No trades to analyze')
-    else:
+    # if trades is None:
+    #     # raise ValueError('No trades to analyze')
+    # else:
     pair_counter = 0
     for pair, data in plot_elements["tickers"].items():
         pair_counter += 1