155 lines
4.5 KiB
Python
155 lines
4.5 KiB
Python
"""
|
|
Handlers for IPythonDirective's @doctest pseudo-decorator.
|
|
|
|
The Sphinx extension that provides support for embedded IPython code provides
|
|
a pseudo-decorator @doctest, which treats the input/output block as a
|
|
doctest, raising a RuntimeError during doc generation if the actual output
|
|
(after running the input) does not match the expected output.
|
|
|
|
An example usage is:
|
|
|
|
.. code-block:: rst
|
|
|
|
.. ipython::
|
|
|
|
In [1]: x = 1
|
|
|
|
@doctest
|
|
In [2]: x + 2
|
|
Out[3]: 3
|
|
|
|
One can also provide arguments to the decorator. The first argument should be
|
|
the name of a custom handler. The specification of any other arguments is
|
|
determined by the handler. For example,
|
|
|
|
.. code-block:: rst
|
|
|
|
.. ipython::
|
|
|
|
@doctest float
|
|
In [154]: 0.1 + 0.2
|
|
Out[154]: 0.3
|
|
|
|
allows the actual output ``0.30000000000000004`` to match the expected output
|
|
due to a comparison with `np.allclose`.
|
|
|
|
This module contains handlers for the @doctest pseudo-decorator. Handlers
|
|
should have the following function signature::
|
|
|
|
handler(sphinx_shell, args, input_lines, found, submitted)
|
|
|
|
where `sphinx_shell` is the embedded Sphinx shell, `args` contains the list
|
|
of arguments that follow: '@doctest handler_name', `input_lines` contains
|
|
a list of the lines relevant to the current doctest, `found` is a string
|
|
containing the output from the IPython shell, and `submitted` is a string
|
|
containing the expected output from the IPython shell.
|
|
|
|
Handlers must be registered in the `doctests` dict at the end of this module.
|
|
|
|
"""
|
|
|
|
def str_to_array(s):
|
|
"""
|
|
Simplistic converter of strings from repr to float NumPy arrays.
|
|
|
|
If the repr representation has ellipsis in it, then this will fail.
|
|
|
|
Parameters
|
|
----------
|
|
s : str
|
|
The repr version of a NumPy array.
|
|
|
|
Examples
|
|
--------
|
|
>>> s = "array([ 0.3, inf, nan])"
|
|
>>> a = str_to_array(s)
|
|
|
|
"""
|
|
import numpy as np
|
|
|
|
# Need to make sure eval() knows about inf and nan.
|
|
# This also assumes default printoptions for NumPy.
|
|
from numpy import inf, nan
|
|
|
|
if s.startswith(u'array'):
|
|
# Remove array( and )
|
|
s = s[6:-1]
|
|
|
|
if s.startswith(u'['):
|
|
a = np.array(eval(s), dtype=float)
|
|
else:
|
|
# Assume its a regular float. Force 1D so we can index into it.
|
|
a = np.atleast_1d(float(s))
|
|
return a
|
|
|
|
def float_doctest(sphinx_shell, args, input_lines, found, submitted):
|
|
"""
|
|
Doctest which allow the submitted output to vary slightly from the input.
|
|
|
|
Here is how it might appear in an rst file:
|
|
|
|
.. code-block:: rst
|
|
|
|
.. ipython::
|
|
|
|
@doctest float
|
|
In [1]: 0.1 + 0.2
|
|
Out[1]: 0.3
|
|
|
|
"""
|
|
import numpy as np
|
|
|
|
if len(args) == 2:
|
|
rtol = 1e-05
|
|
atol = 1e-08
|
|
else:
|
|
# Both must be specified if any are specified.
|
|
try:
|
|
rtol = float(args[2])
|
|
atol = float(args[3])
|
|
except IndexError:
|
|
e = ("Both `rtol` and `atol` must be specified "
|
|
"if either are specified: {0}".format(args))
|
|
raise IndexError(e)
|
|
|
|
try:
|
|
submitted = str_to_array(submitted)
|
|
found = str_to_array(found)
|
|
except:
|
|
# For example, if the array is huge and there are ellipsis in it.
|
|
error = True
|
|
else:
|
|
found_isnan = np.isnan(found)
|
|
submitted_isnan = np.isnan(submitted)
|
|
error = not np.allclose(found_isnan, submitted_isnan)
|
|
error |= not np.allclose(found[~found_isnan],
|
|
submitted[~submitted_isnan],
|
|
rtol=rtol, atol=atol)
|
|
|
|
TAB = ' ' * 4
|
|
directive = sphinx_shell.directive
|
|
if directive is None:
|
|
source = 'Unavailable'
|
|
content = 'Unavailable'
|
|
else:
|
|
source = directive.state.document.current_source
|
|
# Add tabs and make into a single string.
|
|
content = '\n'.join([TAB + line for line in directive.content])
|
|
|
|
if error:
|
|
|
|
e = ('doctest float comparison failure\n\n'
|
|
'Document source: {0}\n\n'
|
|
'Raw content: \n{1}\n\n'
|
|
'On input line(s):\n{TAB}{2}\n\n'
|
|
'we found output:\n{TAB}{3}\n\n'
|
|
'instead of the expected:\n{TAB}{4}\n\n')
|
|
e = e.format(source, content, '\n'.join(input_lines), repr(found),
|
|
repr(submitted), TAB=TAB)
|
|
raise RuntimeError(e)
|
|
|
|
# dict of allowable doctest handlers. The key represents the first argument
|
|
# that must be given to @doctest in order to activate the handler.
|
|
doctests = {
|
|
'float': float_doctest,
|
|
}
|