Merge pull request #2715 from AaronV77/aaron-sprint-(special-method-printing)-2018

WIP SciPy sprint, printing special methods to prompt.

news/aaron-sprint-(special-method-printing)-2018.rst

@@ -0,0 +1,13 @@
+**Added:**
+
+- Added a hook for printing a spcial display method on an object.
+
+**Changed:** None
+
+**Deprecated:** None
+
+**Removed:** None
+
+**Fixed:** None
+
+**Security:** None

xonsh/pretty.py

@@ -115,6 +115,9 @@ def pretty(obj, verbose=False, max_width=79, newline='\n', max_seq_length=MAX_SE
     """
     Pretty print the object's representation.
     """
+    if hasattr(obj, 'xonsh_display'):
+        return obj.xonsh_display()
+
     stream = CUnicodeIO()
     printer = RepresentationPrinter(stream, verbose, max_width, newline, max_seq_length=max_seq_length)
     printer.pretty(obj)