Insert lambda into map in prcalcualtor.py

Author: bobleesj

src/diffpy/srfit/sas/prcalculator.py

@@ -92,9 +92,7 @@ def __call__(self, r):
         self._invertor.y = iq
         self._invertor.err = diq
         c, c_cov = self._invertor.invert_optimize()
-        calculate_pr = lambda x: self._invertor.pr(c, x)
-        pr = map(calculate_pr, r)
-
+        pr = map(lambda x: self._invertor.pr(c, x), r)
         pr = numpy.array(pr)
         return self.scale.value * pr