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Backport PR #2223: Custom tracebacks...
Backport PR #2223: Custom tracebacks Rather than special casing IPython.parallel errors (which led to issue #2221), this adds a simple API where exception classes can offer a custom traceback, by defining a `_render_traceback_(self)` method. It also adds some documentation on how third parties can integrate packages with IPython. 'Configuration & customisation' seemed the most natural home for this. We should remember to close #2221 when we merge this - I forgot to put it in a commit message.

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test_openpy.py
23 lines | 803 B | text/x-python | PythonLexer
import io
import os.path
import nose.tools as nt
from IPython.utils import openpy
mydir = os.path.dirname(__file__)
nonascii_path = os.path.join(mydir, '../../core/tests/nonascii.py')
def test_detect_encoding():
f = open(nonascii_path, 'rb')
enc, lines = openpy.detect_encoding(f.readline)
nt.assert_equal(enc, 'iso-8859-5')
def test_read_file():
read_specified_enc = io.open(nonascii_path, encoding='iso-8859-5').read()
read_detected_enc = openpy.read_py_file(nonascii_path, skip_encoding_cookie=False)
nt.assert_equal(read_detected_enc, read_specified_enc)
assert u'coding: iso-8859-5' in read_detected_enc
read_strip_enc_cookie = openpy.read_py_file(nonascii_path, skip_encoding_cookie=True)
assert u'coding: iso-8859-5' not in read_strip_enc_cookie