remove useles float casting in gc_percent

source/_static/code/gc_percent.py

 
 def gc_percent(seq):
     """
+    Compute the ratio of GC in a DNA sequence
+
     :param seq: The nucleic sequence to compute
     :type seq: string
     :return: the percent of GC in the sequence
     :rtype: float
     """
     seq = seq.upper()
-    gc_pc = float(seq.count('G') + seq.count('C')) / float(len(seq))
+    gc_pc = seq.count('G') + seq.count('C') / len(seq)
     return gc_pc