use black lint to format

Author: Oghenemarho Onothoja

docs/conf.py

@@ -48,9 +48,9 @@
 master_doc = "index"
 
 # General information about the project.
-project = u"PyFunctional"
-copyright = u"2019, Pedro Rodriguez"
-author = u"Pedro Rodriguez"
+project = "PyFunctional"
+copyright = "2019, Pedro Rodriguez"
+author = "Pedro Rodriguez"
 
 # The version info for the project you're documenting, acts as replacement for
 # |version| and |release|, also used in various other places throughout the
@@ -224,8 +224,8 @@
     (
         master_doc,
         "PyFunctional.tex",
-        u"PyFunctional Documentation",
-        u"Pedro Rodriguez",
+        "PyFunctional Documentation",
+        "Pedro Rodriguez",
         "manual",
     ),
 ]
@@ -255,7 +255,7 @@
 
 # One entry per manual page. List of tuples
 # (source start file, name, description, authors, manual section).
-man_pages = [(master_doc, "pyfunctional", u"PyFunctional Documentation", [author], 1)]
+man_pages = [(master_doc, "pyfunctional", "PyFunctional Documentation", [author], 1)]
 
 # If true, show URL addresses after external links.
 # man_show_urls = False
@@ -270,7 +270,7 @@
     (
         master_doc,
         "PyFunctional",
-        u"PyFunctional Documentation",
+        "PyFunctional Documentation",
         author,
         "PyFunctional",
         "One line description of project.",

functional/pipeline.py

@@ -29,7 +29,7 @@
 from functional.execution import ExecutionStrategies
 
 
-TSequence = TypeVar("TSequence", covariant=True, bound="Sequence") 
+TSequence = TypeVar("TSequence", covariant=True, bound="Sequence")
 
 
 class Sequence(object):
@@ -39,7 +39,12 @@ class Sequence(object):
     """
 
     def __init__(
-        self, sequence: TSequence, transform=None, engine: ExecutionEngine=None, max_repr_items: int=None, no_wrap: bool=False
+        self,
+        sequence: TSequence,
+        transform=None,
+        engine: ExecutionEngine = None,
+        max_repr_items: int = None,
+        no_wrap: bool = False,
     ):
         # pylint: disable=protected-access
         """
@@ -230,7 +235,7 @@ def cache(self, delete_lineage=False):
             self._lineage = Lineage(engine=self.engine)
         return self
 
-    def head(self, no_wrap: bool=False):
+    def head(self, no_wrap: bool = False):
         """
         Returns the first element of the sequence.
 
@@ -252,7 +257,7 @@ def head(self, no_wrap: bool=False):
         else:
             return _wrap(self.take(1)[0])
 
-    def first(self, no_wrap: bool=False):
+    def first(self, no_wrap: bool = False):
         """
         Returns the first element of the sequence.
 
@@ -271,7 +276,7 @@ def first(self, no_wrap: bool=False):
         """
         return self.head(no_wrap=no_wrap)
 
-    def head_option(self, no_wrap: bool=False):
+    def head_option(self, no_wrap: bool = False):
         """
         Returns the first element of the sequence or None, if the sequence is empty.
 
@@ -288,7 +293,7 @@ def head_option(self, no_wrap: bool=False):
             return None
         return self.head(no_wrap=no_wrap)
 
-    def last(self, no_wrap: bool=False):
+    def last(self, no_wrap: bool = False):
         """
         Returns the last element of the sequence.
 
@@ -310,7 +315,7 @@ def last(self, no_wrap: bool=False):
         else:
             return _wrap(self.sequence[-1])
 
-    def last_option(self, no_wrap: bool=False):
+    def last_option(self, no_wrap: bool = False):
         """
         Returns the last element of the sequence or None, if the sequence is empty.
 

functional/test/test_functional.py

@@ -1074,17 +1074,17 @@ def my_zip(it):
 
         @extend
         def square(it):
-            return [i ** 2 for i in it]
+            return [i**2 for i in it]
 
         result = seq.range(100).square().list()
-        expected = [i ** 2 for i in range(100)]
+        expected = [i**2 for i in range(100)]
         self.assertEqual(result, expected)
 
         name = "PARALLEL_SQUARE"
 
         @extend(parallel=True, name=name)
         def square_parallel(it):
-            return [i ** 2 for i in it]
+            return [i**2 for i in it]
 
         result = seq.range(100).square_parallel()
         self.assertEqual(result.sum(), sum(expected))
@@ -1114,8 +1114,8 @@ def toarray(it):
         expected = array.array("f", range(10))
         self.assertEqual(result, expected)
 
-        result = seq.range(10).map(lambda x: x ** 2).toarray()
-        expected = array.array("f", [i ** 2 for i in range(10)])
+        result = seq.range(10).map(lambda x: x**2).toarray()
+        expected = array.array("f", [i**2 for i in range(10)])
         self.assertEqual(result, expected)
 
         # a more complex example combining all above

functional/transformations.py

@@ -172,7 +172,7 @@ def distinct_by(sequence):
     return Transformation("distinct_by({0})".format(name(func)), distinct_by, None)
 
 
-def sorted_t(key=None, reverse: bool=False):
+def sorted_t(key=None, reverse: bool = False):
     """
     Transformation for Sequence.sorted
     :param key: key to sort by