upstream/ipython Files · IPython/nbformat/v3/tests/formattest.py

Backport PR : Fix for incorrect default encoding on Windows....

Backport PR : 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.

Bradley M. Froehle - - Load All Authors

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      # -*- coding: utf8 -*-

      import io

      import os

      import shutil

      import tempfile

      pjoin = os.path.join

      from ..nbbase import (

          NotebookNode,

          new_code_cell, new_text_cell, new_worksheet, new_notebook

      )

      from ..nbpy import reads, writes, read, write

      from .nbexamples import nb0, nb0_py

      def open_utf8(fname, mode):

          return io.open(fname, mode=mode, encoding='utf-8')

      class NBFormatTest:

          """Mixin for writing notebook format tests"""

          # override with appropriate values in subclasses

          nb0_ref = None

          ext = None

          mod = None

          def setUp(self):

              self.wd = tempfile.mkdtemp()

          def tearDown(self):

              shutil.rmtree(self.wd)

          def assertNBEquals(self, nba, nbb):

              self.assertEqual(nba, nbb)

          def test_writes(self):

              s = self.mod.writes(nb0)

              if self.nb0_ref:

                  self.assertEqual(s, self.nb0_ref)

          def test_reads(self):

              s = self.mod.writes(nb0)

              nb = self.mod.reads(s)

          def test_roundtrip(self):

              s = self.mod.writes(nb0)

              self.assertNBEquals(self.mod.reads(s),nb0)

          def test_write_file(self):

              with open_utf8(pjoin(self.wd, "nb0.%s" % self.ext), 'w') as f:

                  self.mod.write(nb0, f)

          def test_read_file(self):

              with open_utf8(pjoin(self.wd, "nb0.%s" % self.ext), 'w') as f:

                  self.mod.write(nb0, f)

              with open_utf8(pjoin(self.wd, "nb0.%s" % self.ext), 'r') as f:

                  nb = self.mod.read(f)

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				# -- coding: utf8 --
				import io
				import os
				import shutil
				import tempfile

				pjoin = os.path.join

				from ..nbbase import (
				NotebookNode,
				new_code_cell, new_text_cell, new_worksheet, new_notebook
				)

				from ..nbpy import reads, writes, read, write
				from .nbexamples import nb0, nb0_py


				def open_utf8(fname, mode):
				return io.open(fname, mode=mode, encoding='utf-8')

				class NBFormatTest:
				"""Mixin for writing notebook format tests"""

				# override with appropriate values in subclasses
				nb0_ref = None
				ext = None
				mod = None

				def setUp(self):
				self.wd = tempfile.mkdtemp()

				def tearDown(self):
				shutil.rmtree(self.wd)

				def assertNBEquals(self, nba, nbb):
				self.assertEqual(nba, nbb)

				def test_writes(self):
				s = self.mod.writes(nb0)
				if self.nb0_ref:
				self.assertEqual(s, self.nb0_ref)

				def test_reads(self):
				s = self.mod.writes(nb0)
				nb = self.mod.reads(s)

				def test_roundtrip(self):
				s = self.mod.writes(nb0)
				self.assertNBEquals(self.mod.reads(s),nb0)

				def test_write_file(self):
				with open_utf8(pjoin(self.wd, "nb0.%s" % self.ext), 'w') as f:
				self.mod.write(nb0, f)

				def test_read_file(self):
				with open_utf8(pjoin(self.wd, "nb0.%s" % self.ext), 'w') as f:
				self.mod.write(nb0, f)

				with open_utf8(pjoin(self.wd, "nb0.%s" % self.ext), 'r') as f:
				nb = self.mod.read(f)