processors

Some processors for NBProcessor

On this page we’ll be using this private helper to process a notebook and return the results, to simplify testing:

def _run_procs(procs=None, return_nb=False, path=_test_file):
    nbp = NBProcessor(path, procs)
    nbp.process()
    if return_nb: return nbp.nb
    return '\n'.join([str(cell) for cell in nbp.nb.cells])

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populate_language

 populate_language (nb)

Set cell language based on NB metadata and magics

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insert_warning

 insert_warning (nb)

Insert Autogenerated Warning Into Notebook after the first cell.

This preprocessor inserts a warning in the markdown destination that the file is autogenerated. This warning is inserted in the second cell so we do not interfere with front matter.

res = _run_procs(insert_warning)
assert "<!-- WARNING: THIS FILE WAS AUTOGENERATED!" in res
L('foo', None, 'a').filter(lambda x:x == 1)
_tstre = re.compile('a')

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add_show_docs

 add_show_docs (nb)

Add show_doc cells after exported cells, unless they are already documented

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cell_lang

 cell_lang (cell)
res = _run_procs([populate_language, add_show_docs])
assert "show_doc(some_func)'" in res
assert "show_doc(and_another)'" in res
assert "show_doc(another_func)'" not in res

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strip_ansi

 strip_ansi (cell)

Strip Ansi Characters.

res = _run_procs(strip_ansi)
assert not _re_ansi_escape.findall(res)

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strip_hidden_metadata

 strip_hidden_metadata (cell)

Strips “hidden” metadata property from code cells so it doesn’t interfere with docs rendering

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hide_

 hide_ (cell)

Hide cell from output

res = _run_procs(hide_)
assert 'you will not be able to see this cell at all either' not in res

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hide_line

 hide_line (cell)

Hide lines of code in code cells with the directive hide_line at the end of a line of code

res = _run_procs(hide_line)
assert r"def show():\n    a = 2\n    b = 3" not in res
assert r"def show():\n    a = 2"                in res

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filter_stream_

 filter_stream_ (cell, *words)

Remove output lines containing any of words in cell stream output

res = _run_procs(filter_stream_)
exp=r"'A line\n', 'Another line.\n'"
assert exp in res

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clean_magics

 clean_magics (cell)

A preprocessor to remove cell magic commands

res = _run_procs(clean_magics)
assert "%%" not in res

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rm_header_dash

 rm_header_dash (cell)

Remove headings that end with a dash -

res = _run_procs(rm_header_dash)
assert 'some words' in res
assert 'A heading to Hide' not in res
assert 'Yet another heading to hide' not in res

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rm_export

 rm_export (cell)

Remove cells that are exported or hidden

res = _run_procs(rm_export)
assert 'dontshow' not in res

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clean_show_doc

 clean_show_doc (cell)

Remove ShowDoc input cells

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exec_show_docs

 exec_show_docs (nb)

Execute cells needed for show_docs output, including exported cells and imports

res = _run_procs([add_show_docs, exec_show_docs])
assert res

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FilterDefaults

 FilterDefaults ()

Override FilterDefaults to change which notebook processors are used