Merge pull request #446 from gcarq/pylint_fixes

Pylint fixes

freqtrade/main.py

@@ -6,7 +6,7 @@ import sys
 import time
 import traceback
 from datetime import datetime
-from typing import Dict, List, Optional
+from typing import Dict, List, Optional, Any
 
 import arrow
 import requests
@@ -23,7 +23,7 @@ from freqtrade.strategy.strategy import Strategy
 
 logger = logging.getLogger('freqtrade')
 
-_CONF = {}
+_CONF: Dict[str, Any] = {}
 
 
 def refresh_whitelist(whitelist: List[str]) -> List[str]:
@@ -55,7 +55,7 @@ def refresh_whitelist(whitelist: List[str]) -> List[str]:
     return final_list
 
 
-def process_maybe_execute_buy(conf, interval):
+def process_maybe_execute_buy(interval):
     """
     Tries to execute a buy trade in a safe way
     :return: True if executed
@@ -64,7 +64,7 @@ def process_maybe_execute_buy(conf, interval):
         # Create entity and execute trade
         if create_trade(float(_CONF['stake_amount']), interval):
             return True
-        else:
+
         logger.info(
             'Checked all whitelisted currencies. '
             'Found no suitable entry positions for buying. Will keep looking ...'
@@ -115,7 +115,7 @@ def _process(interval: int, nb_assets: Optional[int] = 0) -> bool:
         # Query trades from persistence layer
         trades = Trade.query.filter(Trade.is_open.is_(True)).all()
         if len(trades) < _CONF['max_open_trades']:
-            state_changed = process_maybe_execute_buy(_CONF, interval)
+            state_changed = process_maybe_execute_buy(interval)
 
         for trade in trades:
             state_changed |= process_maybe_execute_sell(trade, interval)
@@ -159,7 +159,7 @@ def handle_timedout_limit_buy(trade: Trade, order: Dict) -> bool:
         rpc.send_msg('*Timeout:* Unfilled buy order for {} cancelled'.format(
                      trade.pair.replace('_', '/')))
         return True
-    else:
+
     # if trade is partially complete, edit the stake details for the trade
     # and close the order
     trade.amount = order['amount'] - order['remaining']
@@ -189,7 +189,7 @@ def handle_timedout_limit_sell(trade: Trade, order: Dict) -> bool:
                      trade.pair.replace('_', '/')))
         logger.info('Sell order timeout for %s.', trade)
         return True
-    else:
+
     # TODO: figure out how to handle partially complete sell orders
     return False
 

freqtrade/optimize/__init__.py

@@ -22,7 +22,7 @@ def trim_tickerlist(tickerlist, timerange):
         return tickerlist[0:start]
     elif stype == ('index', 'index'):
         return tickerlist[start:stop]
-    else:
+
     return tickerlist
 
 

freqtrade/optimize/backtesting.py

@@ -26,7 +26,7 @@ def get_timeframe(data: Dict[str, DataFrame]) -> Tuple[arrow.Arrow, arrow.Arrow]
     :return: tuple containing min_date, max_date
     """
     all_dates = Series([])
-    for pair, pair_data in data.items():
+    for pair_data in data.values():
         all_dates = all_dates.append(pair_data['date'])
     all_dates.sort_values(inplace=True)
     return arrow.get(all_dates.iloc[0]), arrow.get(all_dates.iloc[-1])
@@ -212,7 +212,10 @@ def start(args):
     preprocessed = optimize.tickerdata_to_dataframe(data)
     # Print timeframe
     min_date, max_date = get_timeframe(preprocessed)
-    logger.info('Measuring data from %s up to %s ...', min_date.isoformat(), max_date.isoformat())
+    logger.info('Measuring data from %s up to %s (%s days)..',
+                min_date.isoformat(),
+                max_date.isoformat(),
+                (max_date-min_date).days)
     # Execute backtest and print results
     sell_profit_only = config.get('experimental', {}).get('sell_profit_only', False)
     use_sell_signal = config.get('experimental', {}).get('use_sell_signal', False)

freqtrade/optimize/hyperopt.py

@@ -10,7 +10,7 @@ import sys
 from functools import reduce
 from math import exp
 from operator import itemgetter
-from typing import Dict, List
+from typing import Dict, Any, Callable
 
 import numpy
 import talib.abstract as ta
@@ -35,7 +35,7 @@ logging.getLogger('hyperopt.tpe').setLevel(logging.WARNING)
 
 logger = logging.getLogger(__name__)
 
-# set TARGET_TRADES to suit your number concurrent trades so its realistic to 20days of data
+# set TARGET_TRADES to suit your number concurrent trades so its realistic to the number of days
 TARGET_TRADES = 600
 TOTAL_TRIES = 0
 _CURRENT_TRIES = 0
@@ -225,7 +225,7 @@ def calculate_loss(total_profit: float, trade_count: int, trade_duration: float)
     return trade_loss + profit_loss + duration_loss
 
 
-def generate_roi_table(params):
+def generate_roi_table(params) -> Dict[str, float]:
     roi_table = {}
     roi_table["0"] = params['roi_p1'] + params['roi_p2'] + params['roi_p3']
     roi_table[str(params['roi_t3'])] = params['roi_p1'] + params['roi_p2']
@@ -235,7 +235,7 @@ def generate_roi_table(params):
     return roi_table
 
 
-def roi_space() -> List[Dict]:
+def roi_space() -> Dict[str, Any]:
     return {
         'roi_t1': hp.quniform('roi_t1', 10, 220, 10),
         'roi_t2': hp.quniform('roi_t2', 10, 120, 10),
@@ -246,13 +246,13 @@ def roi_space() -> List[Dict]:
     }
 
 
-def stoploss_space() -> Dict:
+def stoploss_space() -> Dict[str, Any]:
     return {
         'stoploss': hp.uniform('stoploss', -0.5, -0.02),
     }
 
 
-def indicator_space() -> List[Dict]:
+def indicator_space() -> Dict[str, Any]:
     """
     Define your Hyperopt space for searching strategy parameters
     """
@@ -312,11 +312,11 @@ def indicator_space() -> List[Dict]:
     }
 
 
-def hyperopt_space() -> List[Dict]:
+def hyperopt_space() -> Dict[str, Any]:
     return {**indicator_space(), **roi_space(), **stoploss_space()}
 
 
-def buy_strategy_generator(params) -> None:
+def buy_strategy_generator(params: Dict[str, Any]) -> Callable:
     """
     Define the buy strategy parameters to be used by hyperopt
     """

freqtrade/tests/optimize/test_backtesting.py

@@ -193,7 +193,8 @@ def test_backtest_start(default_conf, mocker, caplog):
     # check the logs, that will contain the backtest result
     exists = ['Using max_open_trades: 1 ...',
               'Using stake_amount: 0.001 ...',
-              'Measuring data from 2017-11-14T21:17:00+00:00 up to 2017-11-14T22:59:00+00:00 ...']
+              'Measuring data from 2017-11-14T21:17:00+00:00 '
+              'up to 2017-11-14T22:59:00+00:00 (0 days)..']
     for line in exists:
         assert ('freqtrade.optimize.backtesting',
                 logging.INFO,

freqtrade/tests/optimize/test_optimize.py

@@ -2,7 +2,6 @@
 
 import os
 import logging
-# from unittest.mock import MagicMock
 from shutil import copyfile
 from freqtrade import exchange, optimize
 from freqtrade.exchange import Bittrex
@@ -10,7 +9,7 @@ from freqtrade.optimize.__init__ import make_testdata_path, download_pairs,\
     download_backtesting_testdata, load_tickerdata_file
 
 # Change this if modifying BTC_UNITEST testdatafile
-_btc_unittest_length = 13681
+_BTC_UNITTEST_LENGTH = 13681
 
 
 def _backup_file(file: str, copy_file: bool = False) -> None:
@@ -199,7 +198,7 @@ def test_download_backtesting_testdata(default_conf, ticker_history, mocker):
     _clean_test_file(file2)
 
 
-def test_download_backtesting_testdata2(default_conf, mocker):
+def test_download_backtesting_testdata2(mocker):
     tick = [{'T': 'bar'}, {'T': 'foo'}]
     mocker.patch('freqtrade.misc.file_dump_json', return_value=None)
     mocker.patch('freqtrade.optimize.__init__.get_ticker_history', return_value=tick)
@@ -210,7 +209,7 @@ def test_download_backtesting_testdata2(default_conf, mocker):
 def test_load_tickerdata_file():
     assert not load_tickerdata_file(None, 'BTC_UNITEST', 7)
     tickerdata = load_tickerdata_file(None, 'BTC_UNITEST', 1)
-    assert _btc_unittest_length == len(tickerdata)
+    assert _BTC_UNITTEST_LENGTH == len(tickerdata)
 
 
 def test_init(default_conf, mocker):
@@ -225,4 +224,4 @@ def test_tickerdata_to_dataframe():
     tick = load_tickerdata_file(None, 'BTC_UNITEST', 1, timerange=timerange)
     tickerlist = {'BTC_UNITEST': tick}
     data = optimize.tickerdata_to_dataframe(tickerlist)
-    assert 100 == len(data['BTC_UNITEST'])
+    assert len(data['BTC_UNITEST']) == 100

freqtrade/tests/test_analyze.py

@@ -1,13 +1,13 @@
 # pragma pylint: disable=missing-docstring,W0621
+import datetime
 import json
 from unittest.mock import MagicMock
-import freqtrade.tests.conftest as tt  # test tools
 
 import arrow
-import datetime
 import pytest
 from pandas import DataFrame
 
+import freqtrade.tests.conftest as tt  # test tools
 from freqtrade.analyze import (get_signal, parse_ticker_dataframe,
                                populate_buy_trend, populate_indicators,
                                populate_sell_trend)

freqtrade/tests/test_main.py

@@ -2,7 +2,6 @@
 import copy
 import logging
 from unittest.mock import MagicMock
-import freqtrade.tests.conftest as tt  # test tools
 
 import arrow
 import pytest
@@ -10,6 +9,7 @@ import requests
 from sqlalchemy import create_engine
 
 import freqtrade.main as main
+import freqtrade.tests.conftest as tt  # test tools
 from freqtrade import DependencyException, OperationalException
 from freqtrade.exchange import Exchanges
 from freqtrade.main import (_process, check_handle_timedout, create_trade,
@@ -50,9 +50,9 @@ def test_main_start_hyperopt(mocker):
 def test_process_maybe_execute_buy(default_conf, mocker):
     mocker.patch.dict('freqtrade.main._CONF', default_conf)
     mocker.patch('freqtrade.main.create_trade', return_value=True)
-    assert main.process_maybe_execute_buy(default_conf, int(default_conf['ticker_interval']))
+    assert main.process_maybe_execute_buy(int(default_conf['ticker_interval']))
     mocker.patch('freqtrade.main.create_trade', return_value=False)
-    assert not main.process_maybe_execute_buy(default_conf, int(default_conf['ticker_interval']))
+    assert not main.process_maybe_execute_buy(int(default_conf['ticker_interval']))
 
 
 def test_process_maybe_execute_sell(default_conf, mocker):
@@ -71,7 +71,7 @@ def test_process_maybe_execute_sell(default_conf, mocker):
 def test_process_maybe_execute_buy_exception(default_conf, mocker, caplog):
     mocker.patch.dict('freqtrade.main._CONF', default_conf)
     mocker.patch('freqtrade.main.create_trade', MagicMock(side_effect=DependencyException))
-    main.process_maybe_execute_buy(default_conf, int(default_conf['ticker_interval']))
+    main.process_maybe_execute_buy(int(default_conf['ticker_interval']))
     tt.log_has('Unable to create trade:', caplog.record_tuples)
 
 
@@ -256,7 +256,7 @@ def test_create_trade_no_pairs_after_blacklist(default_conf, ticker, mocker):
         create_trade(default_conf['stake_amount'], int(default_conf['ticker_interval']))
 
 
-def test_create_trade_no_signal(default_conf, ticker, mocker):
+def test_create_trade_no_signal(default_conf, mocker):
     default_conf['dry_run'] = True
     mocker.patch.dict('freqtrade.main._CONF', default_conf)
     mocker.patch('freqtrade.main.get_signal', MagicMock(return_value=(False, False)))
@@ -308,7 +308,7 @@ def test_handle_trade(default_conf, limit_buy_order, limit_sell_order, mocker):
     assert trade.close_date is not None
 
 
-def test_handle_overlpapping_signals(default_conf, ticker, mocker, caplog):
+def test_handle_overlpapping_signals(default_conf, ticker, mocker):
     default_conf.update({'experimental': {'use_sell_signal': True}})
     mocker.patch.dict('freqtrade.main._CONF', default_conf)
 
@@ -471,7 +471,7 @@ def test_check_handle_timedout_buy(default_conf, ticker, limit_buy_order_old, mo
     assert len(trades) == 0
 
 
-def test_handle_timedout_limit_buy(default_conf, mocker):
+def test_handle_timedout_limit_buy(mocker):
     cancel_order = MagicMock()
     mocker.patch('freqtrade.exchange.cancel_order', cancel_order)
     Trade.session = MagicMock()
@@ -519,7 +519,7 @@ def test_check_handle_timedout_sell(default_conf, ticker, limit_sell_order_old,
     assert trade_sell.is_open is True
 
 
-def test_handle_timedout_limit_sell(default_conf, mocker):
+def test_handle_timedout_limit_sell(mocker):
     cancel_order = MagicMock()
     mocker.patch('freqtrade.exchange.cancel_order', cancel_order)
     trade = MagicMock()

freqtrade/tests/test_misc.py

@@ -3,13 +3,13 @@ import argparse
 import json
 import time
 from copy import deepcopy
+from unittest.mock import MagicMock
 
 import pytest
-from unittest.mock import MagicMock
 from jsonschema import ValidationError
 
-from freqtrade.misc import (common_args_parser, load_config, parse_args,
-                            throttle, file_dump_json, parse_timerange)
+from freqtrade.misc import (common_args_parser, file_dump_json, load_config,
+                            parse_args, parse_timerange, throttle)
 
 
 def test_throttle():
@@ -124,7 +124,7 @@ def test_parse_args_backtesting_custom():
     assert call_args.refresh_pairs is True
 
 
-def test_parse_args_hyperopt_custom(mocker):
+def test_parse_args_hyperopt_custom():
     args = ['-c', 'test_conf.json', 'hyperopt', '--epochs', '20']
     call_args = parse_args(args, '')
     assert call_args.config == 'test_conf.json'
@@ -134,7 +134,7 @@ def test_parse_args_hyperopt_custom(mocker):
     assert call_args.func is not None
 
 
-def test_file_dump_json(default_conf, mocker):
+def test_file_dump_json(mocker):
     file_open = mocker.patch('freqtrade.misc.open', MagicMock())
     json_dump = mocker.patch('json.dump', MagicMock())
     file_dump_json('somefile', [1, 2, 3])