Update histogram.py

Author: glamp

bashplotlib/histogram.py

@@ -122,7 +122,7 @@ def plot_hist(f, height=20.0, bincount=None, binwidth=None, pch="o", colour="def
     mean /= n
 
     bins = list(calc_bins(n, min_val, max_val, bincount, binwidth))
-    hist = {i: 0 for i in range(len(bins))}
+    hist = dict((i, 0) for i in range(len(bins)))
 
     for number in read_numbers(f):
         for i, b in enumerate(bins):