Merge pull request #12902 from petercorke/master

Make %precision work for numpy.float64 type

IPython/core/formatters.py

@@ -636,7 +636,6 b' class PlainTextFormatter(BaseFormatter):'
 
         This parameter can be set via the '%precision' magic.
         """
-
         new = change['new']
         if '%' in new:
             # got explicit format string
@@ -678,6 +677,11 b' class PlainTextFormatter(BaseFormatter):'
     def _type_printers_default(self):
         d = pretty._type_pprinters.copy()
         d[float] = lambda obj,p,cycle: p.text(self.float_format%obj)
+        # if NumPy is used, set precision for its float64 type
+        if "numpy" in sys.modules:
+            import numpy
+
+            d[numpy.float64] = lambda obj, p, cycle: p.text(self.float_format % obj)
         return d
 
     @default('deferred_printers')