Lint fixes (#236)

* correct docstring

* add type annotation to trade_count_lock

* fix indentations

* allow globals in hyperopt.py

* fix import order

* simplify asserts

* use proper variable name

* simplify condition

* fix path operation that fails on windows

freqtrade/optimize/hyperopt.py

@@ -1,4 +1,4 @@
-# pragma pylint: disable=missing-docstring,W0212
+# pragma pylint: disable=missing-docstring,W0212,W0603
 
 
 import json
@@ -159,7 +159,7 @@ def format_results(results: DataFrame):
                 results.profit_percent.mean() * 100.0,
                 results.profit_BTC.sum(),
                 results.duration.mean() * 5,
-    )
+            )
 
 
 def buy_strategy_generator(params):