##// END OF EJS Templates
Backport PR #4163: Fix for incorrect default encoding on Windows....
Backport PR #4163: Fix for incorrect default encoding on Windows. Whilst trying out rendering notebooks in a flask app under Apache on Windows I got the below error when simply trying to import `SlidesExporter` ```python mod_wsgi (pid=6260): Exception occurred processing WSGI script 'flask_test.wsgi'. Traceback (most recent call last): File "flask_test.py", line 81, in render_notebook from IPython.nbconvert.exporters import SlidesExporter File "c:\\dev\\code\\ipython\\IPython\\__init__.py", line 47, in <module> from .terminal.embed import embed File "c:\\dev\\code\\ipython\\IPython\\terminal\\embed.py", line 32, in <module> from IPython.terminal.interactiveshell import TerminalInteractiveShell File "c:\\dev\\code\\ipython\\IPython\\terminal\\interactiveshell.py", line 25, in <module> from IPython.core.interactiveshell import InteractiveShell, InteractiveShellABC File "c:\\dev\\code\\ipython\\IPython\\core\\interactiveshell.py", line 59, in <module> from IPython.core.prompts import PromptManager File "c:\\dev\\code\\ipython\\IPython\\core\\prompts.py", line 138, in <module> HOME = py3compat.str_to_unicode(os.environ.get("HOME","//////:::::ZZZZZ,,,~~~")) File "c:\\dev\\code\\ipython\\IPython\\utils\\py3compat.py", line 18, in decode return s.decode(encoding, "replace") LookupError: unknown encoding: cp0 ``` A little bit of [googling](http://bugs.python.org/issue6501) suggests that Windows returns 'cp0' to indicate there is no code page. This fix simply looks for this invalid value and replaces it with something valid. With this change it works for me.

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test_json.py
33 lines | 844 B | text/x-python | PythonLexer
import pprint
from unittest import TestCase
from ..nbjson import reads, writes
from .. import nbjson
from .nbexamples import nb0
from . import formattest
from .nbexamples import nb0
class TestJSON(formattest.NBFormatTest, TestCase):
nb0_ref = None
ext = 'ipynb'
mod = nbjson
def test_roundtrip_nosplit(self):
"""Ensure that multiline blobs are still readable"""
# ensures that notebooks written prior to splitlines change
# are still readable.
s = writes(nb0, split_lines=False)
self.assertEqual(nbjson.reads(s),nb0)
def test_roundtrip_split(self):
"""Ensure that splitting multiline blocks is safe"""
# This won't differ from test_roundtrip unless the default changes
s = writes(nb0, split_lines=True)
self.assertEqual(nbjson.reads(s),nb0)