Add clipboard configuration option. Resolve #43.

Author: ryneeverett

examples/ptpython_config/config.py

@@ -5,6 +5,7 @@
 """
 from __future__ import unicode_literals
 from prompt_toolkit.keys import Keys
+from prompt_toolkit.clipboard.pyperclip import PyperclipClipboard
 from pygments.token import Token
 from ptpython.layout import CompletionVisualisation
 
@@ -138,6 +139,9 @@ def _(event):
         b.insert_text(' ')
     """
 
+    # Use system clipboard.
+    repl.clipboard = PyperclipClipboard()
+
 
 # Custom colorscheme for the UI. See `ptpython/layout.py` and
 # `ptpython/style.py` for all possible tokens.

ptpython/python_input.py

@@ -504,6 +504,7 @@ def create_application(self):
             buffers=buffers,
             key_bindings_registry=self.key_bindings_registry,
             paste_mode=Condition(lambda cli: self.paste_mode),
+            clipboard=getattr(self, 'clipboard', None),
             mouse_support=Condition(lambda cli: self.enable_mouse_support),
             on_abort=AbortAction.RETRY,
             on_exit=self._on_exit,