|
|
"""Read and write notebooks as regular .py files.
|
|
|
|
|
|
Authors:
|
|
|
|
|
|
* Brian Granger
|
|
|
"""
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Copyright (C) 2008-2011 The IPython Development Team
|
|
|
#
|
|
|
# Distributed under the terms of the BSD License. The full license is in
|
|
|
# the file COPYING, distributed as part of this software.
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Imports
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
import re
|
|
|
from .rwbase import NotebookReader, NotebookWriter
|
|
|
from .nbbase import new_code_cell, new_text_cell, new_worksheet, new_notebook
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Code
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
_encoding_declaration_re = re.compile(r"^#.*coding[:=]\s*([-\w.]+)")
|
|
|
|
|
|
class PyReaderError(Exception):
|
|
|
pass
|
|
|
|
|
|
|
|
|
class PyReader(NotebookReader):
|
|
|
|
|
|
def reads(self, s, **kwargs):
|
|
|
return self.to_notebook(s,**kwargs)
|
|
|
|
|
|
def to_notebook(self, s, **kwargs):
|
|
|
lines = s.splitlines()
|
|
|
cells = []
|
|
|
cell_lines = []
|
|
|
state = u'codecell'
|
|
|
for line in lines:
|
|
|
if line.startswith(u'# <nbformat>') or _encoding_declaration_re.match(line):
|
|
|
pass
|
|
|
elif line.startswith(u'# <codecell>'):
|
|
|
cell = self.new_cell(state, cell_lines)
|
|
|
if cell is not None:
|
|
|
cells.append(cell)
|
|
|
state = u'codecell'
|
|
|
cell_lines = []
|
|
|
elif line.startswith(u'# <htmlcell>'):
|
|
|
cell = self.new_cell(state, cell_lines)
|
|
|
if cell is not None:
|
|
|
cells.append(cell)
|
|
|
state = u'htmlcell'
|
|
|
cell_lines = []
|
|
|
elif line.startswith(u'# <markdowncell>'):
|
|
|
cell = self.new_cell(state, cell_lines)
|
|
|
if cell is not None:
|
|
|
cells.append(cell)
|
|
|
state = u'markdowncell'
|
|
|
cell_lines = []
|
|
|
else:
|
|
|
cell_lines.append(line)
|
|
|
if cell_lines and state == u'codecell':
|
|
|
cell = self.new_cell(state, cell_lines)
|
|
|
if cell is not None:
|
|
|
cells.append(cell)
|
|
|
ws = new_worksheet(cells=cells)
|
|
|
nb = new_notebook(worksheets=[ws])
|
|
|
return nb
|
|
|
|
|
|
def new_cell(self, state, lines):
|
|
|
if state == u'codecell':
|
|
|
input = u'\n'.join(lines)
|
|
|
input = input.strip(u'\n')
|
|
|
if input:
|
|
|
return new_code_cell(input=input)
|
|
|
elif state == u'htmlcell':
|
|
|
text = self._remove_comments(lines)
|
|
|
if text:
|
|
|
return new_text_cell(u'html',source=text)
|
|
|
elif state == u'markdowncell':
|
|
|
text = self._remove_comments(lines)
|
|
|
if text:
|
|
|
return new_text_cell(u'markdown',source=text)
|
|
|
|
|
|
def _remove_comments(self, lines):
|
|
|
new_lines = []
|
|
|
for line in lines:
|
|
|
if line.startswith(u'#'):
|
|
|
new_lines.append(line[2:])
|
|
|
else:
|
|
|
new_lines.append(line)
|
|
|
text = u'\n'.join(new_lines)
|
|
|
text = text.strip(u'\n')
|
|
|
return text
|
|
|
|
|
|
def split_lines_into_blocks(self, lines):
|
|
|
if len(lines) == 1:
|
|
|
yield lines[0]
|
|
|
raise StopIteration()
|
|
|
import ast
|
|
|
source = '\n'.join(lines)
|
|
|
code = ast.parse(source)
|
|
|
starts = [x.lineno-1 for x in code.body]
|
|
|
for i in range(len(starts)-1):
|
|
|
yield '\n'.join(lines[starts[i]:starts[i+1]]).strip('\n')
|
|
|
yield '\n'.join(lines[starts[-1]:]).strip('\n')
|
|
|
|
|
|
|
|
|
class PyWriter(NotebookWriter):
|
|
|
|
|
|
def writes(self, nb, **kwargs):
|
|
|
lines = [u'# -*- coding: utf-8 -*-']
|
|
|
lines.extend([u'# <nbformat>2</nbformat>',''])
|
|
|
for ws in nb.worksheets:
|
|
|
for cell in ws.cells:
|
|
|
if cell.cell_type == u'code':
|
|
|
input = cell.get(u'input')
|
|
|
if input is not None:
|
|
|
lines.extend([u'# <codecell>',u''])
|
|
|
lines.extend(input.splitlines())
|
|
|
lines.append(u'')
|
|
|
elif cell.cell_type == u'html':
|
|
|
input = cell.get(u'source')
|
|
|
if input is not None:
|
|
|
lines.extend([u'# <htmlcell>',u''])
|
|
|
lines.extend([u'# ' + line for line in input.splitlines()])
|
|
|
lines.append(u'')
|
|
|
elif cell.cell_type == u'markdown':
|
|
|
input = cell.get(u'source')
|
|
|
if input is not None:
|
|
|
lines.extend([u'# <markdowncell>',u''])
|
|
|
lines.extend([u'# ' + line for line in input.splitlines()])
|
|
|
lines.append(u'')
|
|
|
lines.append('')
|
|
|
return unicode('\n'.join(lines))
|
|
|
|
|
|
|
|
|
_reader = PyReader()
|
|
|
_writer = PyWriter()
|
|
|
|
|
|
reads = _reader.reads
|
|
|
read = _reader.read
|
|
|
to_notebook = _reader.to_notebook
|
|
|
write = _writer.write
|
|
|
writes = _writer.writes
|
|
|
|
|
|
|
