flake8 3.7.1 fixes

freqtrade/tests/optimize/test_backtesting.py

@@ -663,8 +663,8 @@ def test_backtest_alternate_buy_sell(default_conf, fee, mocker):
 def test_backtest_multi_pair(default_conf, fee, mocker):
 
     def evaluate_result_multi(results, freq, max_open_trades):
-            # Find overlapping trades by expanding each trade once per period
-            # and then counting overlaps
+        # Find overlapping trades by expanding each trade once per period
+        # and then counting overlaps
         dates = [pd.Series(pd.date_range(row[1].open_time, row[1].close_time, freq=freq))
                  for row in results[['open_time', 'close_time']].iterrows()]
         deltas = [len(x) for x in dates]

freqtrade/tests/rpc/test_fiat_convert.py

@@ -117,7 +117,7 @@ def test_fiat_convert_get_price(mocker):
     assert fiat_convert._pairs[0].crypto_symbol == 'BTC'
     assert fiat_convert._pairs[0].fiat_symbol == 'USD'
     assert fiat_convert._pairs[0].price == 28000.0
-    assert fiat_convert._pairs[0]._expiration is not 0
+    assert fiat_convert._pairs[0]._expiration != 0
     assert len(fiat_convert._pairs) == 1
 
     # Verify the cached is used

freqtrade/tests/strategy/test_strategy.py

@@ -364,7 +364,7 @@ def test_deprecate_populate_indicators(result):
             in str(w[-1].message)
 
     with warnings.catch_warnings(record=True) as w:
-            # Cause all warnings to always be triggered.
+        # Cause all warnings to always be triggered.
         warnings.simplefilter("always")
         resolver.strategy.advise_buy(indicators, 'ETH/BTC')
         assert len(w) == 1