Merge pull request #193 from gcarq/feature/ci-enforce-pep8

CI: enforce PEP8 conform code

.travis.yml

@@ -15,12 +15,12 @@ install:
 - tar zxvf ta-lib-0.4.0-src.tar.gz
 - cd ta-lib && ./configure && sudo make && sudo make install && cd ..
 - export LD_LIBRARY_PATH=/usr/local/lib:$LD_LIBRARY_PATH
-- pip install coveralls
+- pip install flake8 coveralls
 - pip install -r requirements.txt
 script:
 - pytest --cov=freqtrade --cov-config=.coveragerc freqtrade/tests/
 after_success:
-- coveralls
+- flake8 freqtrade && coveralls
 notifications:
   slack:
     secure: 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

README.md

@@ -248,5 +248,5 @@ $ pytest freqtrade
 Feel like our bot is missing a feature? We welcome your pull requests! Few pointers for contributions:
 
 - Create your PR against the `develop` branch, not `master`.
-- New features need to contain unit tests.
+- New features need to contain unit tests and must be PEP8 conform (`max-line-length = 100`).
 - If you are unsure, discuss the feature on [slack](https://join.slack.com/t/highfrequencybot/shared_invite/enQtMjQ5NTM0OTYzMzY3LWMxYzE3M2MxNDdjMGM3ZTYwNzFjMGIwZGRjNTc3ZGU3MGE3NzdmZGMwNmU3NDM5ZTNmM2Y3NjRiNzk4NmM4OGE) or in a [issue](https://github.com/gcarq/freqtrade/issues) before a PR.

freqtrade/main.py

@@ -60,7 +60,10 @@ def _process(dynamic_whitelist: Optional[int] = 0) -> bool:
     try:
         # Refresh whitelist based on wallet maintenance
         refresh_whitelist(
-            gen_pair_whitelist(_CONF['stake_currency'], topn = dynamic_whitelist) if dynamic_whitelist else None
+            gen_pair_whitelist(
+                _CONF['stake_currency'],
+                topn=dynamic_whitelist
+            ) if dynamic_whitelist else None
         )
         # Query trades from persistence layer
         trades = Trade.query.filter(Trade.is_open.is_(True)).all()
@@ -329,7 +332,9 @@ def main() -> None:
     if args.dry_run_db:
         if _CONF.get('dry_run', False):
             _CONF.update({'dry_run_db': True})
-            logger.info('Dry_run will use the DB file: "tradesv3.dry_run.sqlite". (--dry_run_db detected)')
+            logger.info(
+                'Dry_run will use the DB file: "tradesv3.dry_run.sqlite". (--dry_run_db detected)'
+            )
         else:
             logger.info('Dry run is disabled. (--dry_run_db ignored)')
 

freqtrade/misc.py

@@ -112,7 +112,7 @@ def parse_args(args: List[str]):
     )
     parser.add_argument(
         '--dynamic-whitelist',
-        help='dynamically generate and update whitelist based on 24h BaseVolume (Default 20 currencies)',
+        help='dynamically generate and update whitelist based on 24h BaseVolume (Default 20 currencies)',  # noqa
         dest='dynamic_whitelist',
         const=20,
         type=int,
@@ -122,7 +122,7 @@ def parse_args(args: List[str]):
     parser.add_argument(
         '--dry-run-db',
         help='Force dry run to use a local DB "tradesv3.dry_run.sqlite" instead of memory DB. Work only if dry_run is \
-             enabled.',
+             enabled.',  # noqa
         action='store_true',
         dest='dry_run_db',
     )

freqtrade/optimize/backtesting.py

@@ -35,7 +35,8 @@ def get_timeframe(data: Dict[str, Dict]) -> Tuple[arrow.Arrow, arrow.Arrow]:
     return arrow.get(min_date), arrow.get(max_date)
 
 
-def generate_text_table(data: Dict[str, Dict], results: DataFrame, stake_currency, ticker_interval) -> str:
+def generate_text_table(
+        data: Dict[str, Dict], results: DataFrame, stake_currency, ticker_interval) -> str:
     """
     Generates and returns a text table for the given backtest data and the results dataframe
     :return: pretty printed table with tabulate as str

freqtrade/optimize/hyperopt.py

@@ -50,7 +50,7 @@ OPTIMIZE_CONFIG = {
 }
 
 # Monkey patch config
-from freqtrade import main
+from freqtrade import main  # noqa
 main._CONF = OPTIMIZE_CONFIG
 
 
@@ -103,6 +103,7 @@ SPACE = {
     ]),
 }
 
+
 def log_results(results):
     "if results is better than _TO_BEAT show it"
 
@@ -119,6 +120,7 @@ def log_results(results):
         print('.', end='')
         sys.stdout.flush()
 
+
 def optimizer(params):
     global _CURRENT_TRIES
 

freqtrade/rpc/telegram.py

@@ -93,7 +93,7 @@ def authorized_only(command_handler: Callable[[Bot, Update], None]) -> Callable[
     :return: decorated function
     """
     def wrapper(*args, **kwargs):
-        bot, update = kwargs.get('bot') or args[0], kwargs.get('update') or args[1]
+        update = kwargs.get('update') or args[1]
 
         # Reject unauthorized messages
         chat_id = int(_CONF['telegram']['chat_id'])
@@ -551,7 +551,10 @@ def send_msg(msg: str, bot: Bot = None, parse_mode: ParseMode = ParseMode.MARKDO
 
     try:
         try:
-            bot.send_message(_CONF['telegram']['chat_id'], msg, parse_mode=parse_mode, reply_markup=reply_markup)
+            bot.send_message(
+                _CONF['telegram']['chat_id'], msg,
+                parse_mode=parse_mode, reply_markup=reply_markup
+            )
         except NetworkError as network_err:
             # Sometimes the telegram server resets the current connection,
             # if this is the case we send the message again.
@@ -559,6 +562,9 @@ def send_msg(msg: str, bot: Bot = None, parse_mode: ParseMode = ParseMode.MARKDO
                 'Got Telegram NetworkError: %s! Trying one more time.',
                 network_err.message
             )
-            bot.send_message(_CONF['telegram']['chat_id'], msg, parse_mode=parse_mode, reply_markup=reply_markup)
+            bot.send_message(
+                _CONF['telegram']['chat_id'], msg,
+                parse_mode=parse_mode, reply_markup=reply_markup
+            )
     except TelegramError as telegram_err:
         logger.warning('Got TelegramError: %s! Giving up on that message.', telegram_err.message)

freqtrade/tests/test_main.py

@@ -137,7 +137,9 @@ def test_create_trade_minimal_amount(default_conf, ticker, mocker):
     mocker.patch.dict('freqtrade.main._CONF', default_conf)
     mocker.patch.multiple('freqtrade.rpc', init=MagicMock(), send_msg=MagicMock())
     mocker.patch('freqtrade.main.get_signal', side_effect=lambda s, t: True)
-    buy_mock = mocker.patch('freqtrade.main.exchange.buy', MagicMock(return_value='mocked_limit_buy'))
+    buy_mock = mocker.patch(
+        'freqtrade.main.exchange.buy', MagicMock(return_value='mocked_limit_buy')
+    )
     mocker.patch.multiple('freqtrade.main.exchange',
                           validate_pairs=MagicMock(),
                           get_ticker=ticker)

freqtrade/tests/test_misc.py

@@ -60,11 +60,13 @@ def test_parse_args_dynamic_whitelist():
     assert args is not None
     assert args.dynamic_whitelist is 20
 
+
 def test_parse_args_dynamic_whitelist_10():
     args = parse_args(['--dynamic-whitelist', '10'])
     assert args is not None
     assert args.dynamic_whitelist is 10
 
+
 def test_parse_args_dynamic_whitelist_invalid_values():
     with pytest.raises(SystemExit, match=r'2'):
         parse_args(['--dynamic-whitelist', 'abc'])

freqtrade/tests/test_optimize_backtesting.py

@@ -10,6 +10,7 @@ import os
 
 import pytest
 
+
 def test_backtest(default_conf, mocker):
     mocker.patch.dict('freqtrade.main._CONF', default_conf)
     exchange._API = Bittrex({'key': '', 'secret': ''})

freqtrade/tests/test_rpc_telegram.py

@@ -341,6 +341,7 @@ def test_performance_handle(
     assert 'Performance' in msg_mock.call_args_list[0][0][0]
     assert '<code>BTC_ETH\t10.05%</code>' in msg_mock.call_args_list[0][0][0]
 
+
 def test_daily_handle(
         default_conf, update, ticker, limit_buy_order, limit_sell_order, mocker):
     mocker.patch.dict('freqtrade.main._CONF', default_conf)

setup.cfg

@@ -0,0 +1,4 @@
+[flake8]
+#ignore =
+max-line-length = 100
+max-complexity = 12