diff --git a/dev/dev_malik/fast_jones_patch.py b/dev/dev_malik/fast_jones_patch.py
index fb1d5a8..7bf69d6 100644
--- a/dev/dev_malik/fast_jones_patch.py
+++ b/dev/dev_malik/fast_jones_patch.py
@@ -224,7 +224,7 @@ def condense_term(monomial, poly, A, B, R, gd):
             matching_label = label
             break
     if found_matching_pair:
-        matched_indices = [i for (i, pair) in enumerate(var_labels) if matching_label in pair]
+        matched_indices = [i for i, pair in enumerate(var_labels) if matching_label in pair]
         p1, p2 = var_labels[matched_indices[0]], var_labels[matched_indices[1]]
         v1, v2 = variables[matched_indices[0]], variables[matched_indices[1]]
         l1 = p1[ 1 - p1.index(matching_label) ]
diff --git a/dev/orthogonal/orthogonal.py b/dev/orthogonal/orthogonal.py
index 202b9c8..01e6052 100644
--- a/dev/orthogonal/orthogonal.py
+++ b/dev/orthogonal/orthogonal.py
@@ -233,9 +233,9 @@ class OrthogonalRep(Digraph):
     """
     def __init__(self, horizonal_pairs=[], vertical_pairs=[]):
         Digraph.__init__(self)
-        for (a,b) in horizonal_pairs:
+        for a, b in horizonal_pairs:
             self.add_edge(a, b, 'horizontal')
-        for (a,b) in vertical_pairs:
+        for a, b in vertical_pairs:
             self.add_edge(a, b, 'vertical')
 
         self._build_faces()
diff --git a/spherogram_src/links/links_base.py b/spherogram_src/links/links_base.py
index 9fe9339..b439d39 100644
--- a/spherogram_src/links/links_base.py
+++ b/spherogram_src/links/links_base.py
@@ -591,7 +591,7 @@ def _crossings_from_PD_code(self, code):
                 else:
                     gluings[x] = [(c, i)]
 
-        if {len(v) for v in gluings.values()} != {2}:
+        if any(len(v) != 2 for v in gluings.values()):
             raise ValueError("PD code isn't consistent")
 
         component_starts = self._component_starts_from_PD(
@@ -602,7 +602,7 @@ def _crossings_from_PD_code(self, code):
             crossings[c][i] = crossings[d][j]
 
         component_starts = [crossings[c].crossing_strands()[i]
-                            for (c, i) in component_starts]
+                            for c, i in component_starts]
         return crossings, component_starts
 
     def _component_starts_from_PD(self, code, labels, gluings):
@@ -755,7 +755,7 @@ def _check_crossing_orientations(self):
                 assert C.directions == {(0, 2), (1, 3)}
             else:
                 assert False
-            for (a, b) in C.directions:
+            for a, b in C.directions:
                 D, d = C.adjacent[b]
                 assert d in {x for x, y in D.directions}
                 D, d = C.adjacent[a]
diff --git a/spherogram_src/links/orthogonal.py b/spherogram_src/links/orthogonal.py
index 6dcb880..943bb4a 100644
--- a/spherogram_src/links/orthogonal.py
+++ b/spherogram_src/links/orthogonal.py
@@ -233,9 +233,9 @@ class OrthogonalRep(Digraph):
 
     def __init__(self, horizonal_pairs=[], vertical_pairs=[]):
         Digraph.__init__(self)
-        for (a, b) in horizonal_pairs:
+        for a, b in horizonal_pairs:
             self.add_edge(a, b, 'horizontal')
-        for (a, b) in vertical_pairs:
+        for a, b in vertical_pairs:
             self.add_edge(a, b, 'vertical')
 
         self._build_faces()
diff --git a/spherogram_src/links/simplify.py b/spherogram_src/links/simplify.py
index f1da16c..6e3f800 100644
--- a/spherogram_src/links/simplify.py
+++ b/spherogram_src/links/simplify.py
@@ -406,7 +406,7 @@ def pickup_strand(link, dual_graph, kind, strand):
     dest = edges_crossed[-1][0]
 
     nx.set_edge_attributes(G, 1, 'weight')
-    for (f0, f1) in edges_crossed:
+    for f0, f1 in edges_crossed:
         G[f0][f1]['weight'] = 0
 
     path = nx.shortest_path(G, source, dest, weight='weight')
diff --git a/spherogram_src/links/twist.py b/spherogram_src/links/twist.py
index 1504415..f02cdda 100644
--- a/spherogram_src/links/twist.py
+++ b/spherogram_src/links/twist.py
@@ -28,7 +28,7 @@ def __init__(self, crossing):
             self.cs = crossing
         else:
             assert is_end_of_twist_region(crossing)
-            neighbors = CyclicList(C for (C, i) in crossing.adjacent)
+            neighbors = CyclicList(C for C, i in crossing.adjacent)
             for i in range(4):
                 if neighbors[i] == neighbors[i + 1]:
                     self.cs = CrossingStrand(crossing, i)
@@ -69,7 +69,7 @@ def __len__(self):
 
 
 def is_end_of_twist_region(crossing) -> bool:
-    return len({C for (C, i) in crossing.adjacent}) == 3
+    return len({C for C, i in crossing.adjacent}) == 3
 
 
 def make_twist_regions_consistent(link):