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# -*- coding: utf-8 -*-
from __future__ import absolute_import
import sys
from code import InteractiveConsole
class Cache(object):
"""Replace stdout and stderr behavior in order to collect outputs."""
def __init__(self):
self.reset()
def reset(self):
"""Clean the cache."""
self.out = []
def write(self, line):
"""Collect the output into cache to be accesed later."""
self.out.append(line)
def flush(self):
"""Join together all the outputs and return it to be displayed."""
if len(self.out) > 1:
output = ''.join(self.out)[:-1]
self.reset()
return output
class Console(InteractiveConsole):
"""Work as a Python Console."""
def __init__(self, locals):
InteractiveConsole.__init__(self, locals)
self.stdout = sys.stdout
self.stderr = sys.stderr
self._cache = Cache()
self.output = ''
def get_output(self):
"""Replace out and error channels with cache."""
sys.stdout = self._cache
sys.stderr = self._cache
def return_output(self):
"""Reassign the proper values to output and error channel."""
sys.stdout = self.stdout
sys.stderr = self.stderr
def push(self, line):
"""Insert a command into the console."""
if line in ('exit()', 'help()'):
return
self.get_output()
val = InteractiveConsole.push(self, line)
self.return_output()
self.output = self._cache.flush()
return val
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