Format w/ black

1 files changed, 6 insertions, 4 deletions

diff --git a/networkx/utils/random_sequence.py b/networkx/utils/random_sequence.py
index 8fb058c6..7bd68c79 100644
--- a/networkx/utils/random_sequence.py
+++ b/networkx/utils/random_sequence.py
@@ -11,6 +11,7 @@ from networkx.utils import py_random_state
 # uses Python's random module
 # https://docs.python.org/3/library/random.html
 
+
 @py_random_state(2)
 def powerlaw_sequence(n, exponent=2.0, seed=None):
     """
@@ -73,12 +74,12 @@ def zipf_rv(alpha, xmin=1, seed=None):
     if alpha <= 1:
         raise ValueError("a <= 1.0")
     a1 = alpha - 1.0
-    b = 2**a1
+    b = 2 ** a1
     while True:
         u = 1.0 - seed.random()  # u in (0,1]
         v = seed.random()  # v in [0,1)
-        x = int(xmin * u**-(1.0 / a1))
-        t = (1.0 + (1.0 / x))**a1
+        x = int(xmin * u ** -(1.0 / a1))
+        t = (1.0 + (1.0 / x)) ** a1
         if v * x * (t - 1.0) / (b - 1.0) <= t / b:
             break
     return x
@@ -115,7 +116,8 @@ def discrete_sequence(n, distribution=None, cdistribution=None, seed=None):
         cdf = cumulative_distribution(distribution)
     else:
         raise nx.NetworkXError(
-            "discrete_sequence: distribution or cdistribution missing")
+            "discrete_sequence: distribution or cdistribution missing"
+        )
 
     # get a uniform random number
     inputseq = [seed.random() for i in range(n)]