Fix: make print_container utility work if the input is not a pty.

Author: jonathanslenders

prompt_toolkit/input/base.py

@@ -4,6 +4,7 @@
 from __future__ import unicode_literals
 
 from abc import ABCMeta, abstractmethod, abstractproperty
+from contextlib import contextmanager
 from six import with_metaclass
 
 __all__ = [
@@ -111,13 +112,18 @@ def closed(self):
  return True
 
  def raw_mode(self):
- raise NotImplementedError
+ return _dummy_context_manager()
 
  def cooked_mode(self):
- raise NotImplementedError
+ return _dummy_context_manager()
 
  def attach(self, input_ready_callback):
- raise NotImplementedError
+ return _dummy_context_manager()
 
  def detach(self):
- raise NotImplementedError
+ return _dummy_context_manager()
+
+
+@contextmanager
+def _dummy_context_manager():
+ yield

prompt_toolkit/shortcuts/utils.py

@@ -2,6 +2,7 @@
 from prompt_toolkit.application import Application
 from prompt_toolkit.eventloop import get_event_loop
 from prompt_toolkit.formatted_text import to_formatted_text, FormattedText
+from prompt_toolkit.input import DummyInput
 from prompt_toolkit.layout import Layout
 from prompt_toolkit.output import Output, ColorDepth
 from prompt_toolkit.output.defaults import create_output, get_default_output
@@ -150,7 +151,8 @@ def exit_immediately():
 
  app = Application(
  layout=Layout(container=container),
- output=output)
+ output=output,
+ input=DummyInput())
  app.run(pre_run=exit_immediately)