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514 lines
22 KiB
514 lines
22 KiB
4 years ago
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# $Id: tables.py 8377 2019-08-27 19:49:45Z milde $
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# Authors: David Goodger <goodger@python.org>; David Priest
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# Copyright: This module has been placed in the public domain.
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"""
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Directives for table elements.
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"""
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__docformat__ = 'reStructuredText'
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import sys
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import os.path
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import csv
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from docutils import io, nodes, statemachine, utils
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from docutils.utils.error_reporting import SafeString
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from docutils.utils import SystemMessagePropagation
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from docutils.parsers.rst import Directive
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from docutils.parsers.rst import directives
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def align(argument):
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return directives.choice(argument, ('left', 'center', 'right'))
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class Table(Directive):
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"""
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Generic table base class.
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"""
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optional_arguments = 1
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final_argument_whitespace = True
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option_spec = {'class': directives.class_option,
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'name': directives.unchanged,
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'align': align,
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'width': directives.length_or_percentage_or_unitless,
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'widths': directives.value_or(('auto', 'grid'),
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directives.positive_int_list)}
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has_content = True
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def make_title(self):
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if self.arguments:
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title_text = self.arguments[0]
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text_nodes, messages = self.state.inline_text(title_text,
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self.lineno)
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title = nodes.title(title_text, '', *text_nodes)
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(title.source,
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title.line) = self.state_machine.get_source_and_line(self.lineno)
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else:
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title = None
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messages = []
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return title, messages
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def process_header_option(self):
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source = self.state_machine.get_source(self.lineno - 1)
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table_head = []
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max_header_cols = 0
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if 'header' in self.options: # separate table header in option
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rows, max_header_cols = self.parse_csv_data_into_rows(
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self.options['header'].split('\n'), self.HeaderDialect(),
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source)
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table_head.extend(rows)
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return table_head, max_header_cols
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def check_table_dimensions(self, rows, header_rows, stub_columns):
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if len(rows) < header_rows:
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error = self.state_machine.reporter.error(
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'%s header row(s) specified but only %s row(s) of data '
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'supplied ("%s" directive).'
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% (header_rows, len(rows), self.name), nodes.literal_block(
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self.block_text, self.block_text), line=self.lineno)
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raise SystemMessagePropagation(error)
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if len(rows) == header_rows > 0:
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error = self.state_machine.reporter.error(
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'Insufficient data supplied (%s row(s)); no data remaining '
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'for table body, required by "%s" directive.'
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% (len(rows), self.name), nodes.literal_block(
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self.block_text, self.block_text), line=self.lineno)
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raise SystemMessagePropagation(error)
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for row in rows:
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if len(row) < stub_columns:
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error = self.state_machine.reporter.error(
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'%s stub column(s) specified but only %s columns(s) of '
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'data supplied ("%s" directive).' %
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(stub_columns, len(row), self.name), nodes.literal_block(
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self.block_text, self.block_text), line=self.lineno)
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raise SystemMessagePropagation(error)
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if len(row) == stub_columns > 0:
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error = self.state_machine.reporter.error(
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'Insufficient data supplied (%s columns(s)); no data remaining '
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'for table body, required by "%s" directive.'
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% (len(row), self.name), nodes.literal_block(
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self.block_text, self.block_text), line=self.lineno)
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raise SystemMessagePropagation(error)
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def set_table_width(self, table_node):
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if 'width' in self.options:
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table_node['width'] = self.options.get('width')
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@property
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def widths(self):
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return self.options.get('widths', '')
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def get_column_widths(self, max_cols):
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if isinstance(self.widths, list):
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if len(self.widths) != max_cols:
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error = self.state_machine.reporter.error(
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'"%s" widths do not match the number of columns in table '
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'(%s).' % (self.name, max_cols), nodes.literal_block(
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self.block_text, self.block_text), line=self.lineno)
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raise SystemMessagePropagation(error)
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col_widths = self.widths
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elif max_cols:
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col_widths = [100 // max_cols] * max_cols
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else:
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error = self.state_machine.reporter.error(
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'No table data detected in CSV file.', nodes.literal_block(
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self.block_text, self.block_text), line=self.lineno)
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raise SystemMessagePropagation(error)
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return col_widths
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def extend_short_rows_with_empty_cells(self, columns, parts):
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for part in parts:
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for row in part:
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if len(row) < columns:
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row.extend([(0, 0, 0, [])] * (columns - len(row)))
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class RSTTable(Table):
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def run(self):
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if not self.content:
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warning = self.state_machine.reporter.warning(
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'Content block expected for the "%s" directive; none found.'
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% self.name, nodes.literal_block(
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self.block_text, self.block_text), line=self.lineno)
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return [warning]
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title, messages = self.make_title()
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node = nodes.Element() # anonymous container for parsing
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self.state.nested_parse(self.content, self.content_offset, node)
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if len(node) != 1 or not isinstance(node[0], nodes.table):
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error = self.state_machine.reporter.error(
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'Error parsing content block for the "%s" directive: exactly '
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'one table expected.' % self.name, nodes.literal_block(
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self.block_text, self.block_text), line=self.lineno)
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return [error]
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table_node = node[0]
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table_node['classes'] += self.options.get('class', [])
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self.set_table_width(table_node)
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if 'align' in self.options:
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table_node['align'] = self.options.get('align')
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tgroup = table_node[0]
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if isinstance(self.widths, list):
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colspecs = [child for child in tgroup.children
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if child.tagname == 'colspec']
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for colspec, col_width in zip(colspecs, self.widths):
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colspec['colwidth'] = col_width
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# @@@ the colwidths argument for <tgroup> is not part of the
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# XML Exchange Table spec (https://www.oasis-open.org/specs/tm9901.htm)
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# and hence violates the docutils.dtd.
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if self.widths == 'auto':
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table_node['classes'] += ['colwidths-auto']
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elif self.widths: # "grid" or list of integers
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table_node['classes'] += ['colwidths-given']
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self.add_name(table_node)
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if title:
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table_node.insert(0, title)
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return [table_node] + messages
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class CSVTable(Table):
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option_spec = {'header-rows': directives.nonnegative_int,
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'stub-columns': directives.nonnegative_int,
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'header': directives.unchanged,
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'width': directives.length_or_percentage_or_unitless,
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'widths': directives.value_or(('auto', ),
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directives.positive_int_list),
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'file': directives.path,
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'url': directives.uri,
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'encoding': directives.encoding,
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'class': directives.class_option,
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'name': directives.unchanged,
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'align': align,
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# field delimiter char
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'delim': directives.single_char_or_whitespace_or_unicode,
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# treat whitespace after delimiter as significant
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'keepspace': directives.flag,
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# text field quote/unquote char:
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'quote': directives.single_char_or_unicode,
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# char used to escape delim & quote as-needed:
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'escape': directives.single_char_or_unicode,}
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class DocutilsDialect(csv.Dialect):
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"""CSV dialect for `csv_table` directive."""
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delimiter = ','
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quotechar = '"'
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doublequote = True
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skipinitialspace = True
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strict = True
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lineterminator = '\n'
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quoting = csv.QUOTE_MINIMAL
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def __init__(self, options):
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if 'delim' in options:
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self.delimiter = CSVTable.encode_for_csv(options['delim'])
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if 'keepspace' in options:
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self.skipinitialspace = False
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if 'quote' in options:
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self.quotechar = CSVTable.encode_for_csv(options['quote'])
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if 'escape' in options:
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self.doublequote = False
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self.escapechar = CSVTable.encode_for_csv(options['escape'])
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csv.Dialect.__init__(self)
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class HeaderDialect(csv.Dialect):
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"""CSV dialect to use for the "header" option data."""
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delimiter = ','
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quotechar = '"'
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escapechar = '\\'
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doublequote = False
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skipinitialspace = True
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strict = True
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lineterminator = '\n'
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quoting = csv.QUOTE_MINIMAL
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def check_requirements(self):
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pass
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def run(self):
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try:
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if (not self.state.document.settings.file_insertion_enabled
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and ('file' in self.options
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or 'url' in self.options)):
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warning = self.state_machine.reporter.warning(
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'File and URL access deactivated; ignoring "%s" '
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'directive.' % self.name, nodes.literal_block(
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self.block_text, self.block_text), line=self.lineno)
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return [warning]
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self.check_requirements()
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title, messages = self.make_title()
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csv_data, source = self.get_csv_data()
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table_head, max_header_cols = self.process_header_option()
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rows, max_cols = self.parse_csv_data_into_rows(
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csv_data, self.DocutilsDialect(self.options), source)
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max_cols = max(max_cols, max_header_cols)
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header_rows = self.options.get('header-rows', 0)
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stub_columns = self.options.get('stub-columns', 0)
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self.check_table_dimensions(rows, header_rows, stub_columns)
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table_head.extend(rows[:header_rows])
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table_body = rows[header_rows:]
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col_widths = self.get_column_widths(max_cols)
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self.extend_short_rows_with_empty_cells(max_cols,
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(table_head, table_body))
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except SystemMessagePropagation as detail:
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return [detail.args[0]]
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except csv.Error as detail:
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message = str(detail)
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if sys.version_info < (3, 0) and '1-character string' in message:
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message += '\nwith Python 2.x this must be an ASCII character.'
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error = self.state_machine.reporter.error(
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'Error with CSV data in "%s" directive:\n%s'
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% (self.name, message), nodes.literal_block(
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self.block_text, self.block_text), line=self.lineno)
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return [error]
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table = (col_widths, table_head, table_body)
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table_node = self.state.build_table(table, self.content_offset,
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stub_columns, widths=self.widths)
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table_node['classes'] += self.options.get('class', [])
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if 'align' in self.options:
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table_node['align'] = self.options.get('align')
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self.set_table_width(table_node)
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self.add_name(table_node)
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if title:
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table_node.insert(0, title)
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return [table_node] + messages
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def get_csv_data(self):
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"""
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Get CSV data from the directive content, from an external
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file, or from a URL reference.
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"""
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encoding = self.options.get(
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'encoding', self.state.document.settings.input_encoding)
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error_handler = self.state.document.settings.input_encoding_error_handler
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if self.content:
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# CSV data is from directive content.
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if 'file' in self.options or 'url' in self.options:
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error = self.state_machine.reporter.error(
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'"%s" directive may not both specify an external file and'
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' have content.' % self.name, nodes.literal_block(
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self.block_text, self.block_text), line=self.lineno)
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raise SystemMessagePropagation(error)
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source = self.content.source(0)
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csv_data = self.content
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elif 'file' in self.options:
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# CSV data is from an external file.
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if 'url' in self.options:
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error = self.state_machine.reporter.error(
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'The "file" and "url" options may not be simultaneously'
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' specified for the "%s" directive.' % self.name,
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nodes.literal_block(self.block_text, self.block_text),
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line=self.lineno)
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raise SystemMessagePropagation(error)
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source_dir = os.path.dirname(
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os.path.abspath(self.state.document.current_source))
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source = os.path.normpath(os.path.join(source_dir,
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self.options['file']))
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source = utils.relative_path(None, source)
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try:
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self.state.document.settings.record_dependencies.add(source)
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csv_file = io.FileInput(source_path=source,
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encoding=encoding,
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error_handler=error_handler)
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csv_data = csv_file.read().splitlines()
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except IOError as error:
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severe = self.state_machine.reporter.severe(
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u'Problems with "%s" directive path:\n%s.'
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% (self.name, SafeString(error)),
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nodes.literal_block(self.block_text, self.block_text),
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line=self.lineno)
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raise SystemMessagePropagation(severe)
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elif 'url' in self.options:
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# CSV data is from a URL.
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# Do not import urllib2 at the top of the module because
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# it may fail due to broken SSL dependencies, and it takes
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# about 0.15 seconds to load.
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if sys.version_info >= (3, 0):
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from urllib.request import urlopen
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from urllib.error import URLError
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else:
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from urllib2 import urlopen, URLError
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source = self.options['url']
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try:
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csv_text = urlopen(source).read()
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except (URLError, IOError, OSError, ValueError) as error:
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||
|
|
severe = self.state_machine.reporter.severe(
|
||
|
|
'Problems with "%s" directive URL "%s":\n%s.'
|
||
|
|
% (self.name, self.options['url'], SafeString(error)),
|
||
|
|
nodes.literal_block(self.block_text, self.block_text),
|
||
|
|
line=self.lineno)
|
||
|
|
raise SystemMessagePropagation(severe)
|
||
|
|
csv_file = io.StringInput(
|
||
|
|
source=csv_text, source_path=source, encoding=encoding,
|
||
|
|
error_handler=(self.state.document.settings.\
|
||
|
|
input_encoding_error_handler))
|
||
|
|
csv_data = csv_file.read().splitlines()
|
||
|
|
else:
|
||
|
|
error = self.state_machine.reporter.warning(
|
||
|
|
'The "%s" directive requires content; none supplied.'
|
||
|
|
% self.name, nodes.literal_block(
|
||
|
|
self.block_text, self.block_text), line=self.lineno)
|
||
|
|
raise SystemMessagePropagation(error)
|
||
|
|
return csv_data, source
|
||
|
|
|
||
|
|
if sys.version_info < (3, 0):
|
||
|
|
# 2.x csv module doesn't do Unicode
|
||
|
|
def decode_from_csv(s):
|
||
|
|
return s.decode('utf-8')
|
||
|
|
def encode_for_csv(s):
|
||
|
|
return s.encode('utf-8')
|
||
|
|
else:
|
||
|
|
def decode_from_csv(s):
|
||
|
|
return s
|
||
|
|
def encode_for_csv(s):
|
||
|
|
return s
|
||
|
|
decode_from_csv = staticmethod(decode_from_csv)
|
||
|
|
encode_for_csv = staticmethod(encode_for_csv)
|
||
|
|
|
||
|
|
def parse_csv_data_into_rows(self, csv_data, dialect, source):
|
||
|
|
# csv.py doesn't do Unicode; encode temporarily as UTF-8
|
||
|
|
csv_reader = csv.reader([self.encode_for_csv(line + '\n')
|
||
|
|
for line in csv_data],
|
||
|
|
dialect=dialect)
|
||
|
|
rows = []
|
||
|
|
max_cols = 0
|
||
|
|
for row in csv_reader:
|
||
|
|
row_data = []
|
||
|
|
for cell in row:
|
||
|
|
# decode UTF-8 back to Unicode
|
||
|
|
cell_text = self.decode_from_csv(cell)
|
||
|
|
cell_data = (0, 0, 0, statemachine.StringList(
|
||
|
|
cell_text.splitlines(), source=source))
|
||
|
|
row_data.append(cell_data)
|
||
|
|
rows.append(row_data)
|
||
|
|
max_cols = max(max_cols, len(row))
|
||
|
|
return rows, max_cols
|
||
|
|
|
||
|
|
|
||
|
|
class ListTable(Table):
|
||
|
|
|
||
|
|
"""
|
||
|
|
Implement tables whose data is encoded as a uniform two-level bullet list.
|
||
|
|
For further ideas, see
|
||
|
|
http://docutils.sf.net/docs/dev/rst/alternatives.html#list-driven-tables
|
||
|
|
"""
|
||
|
|
|
||
|
|
option_spec = {'header-rows': directives.nonnegative_int,
|
||
|
|
'stub-columns': directives.nonnegative_int,
|
||
|
|
'width': directives.length_or_percentage_or_unitless,
|
||
|
|
'widths': directives.value_or(('auto', ),
|
||
|
|
directives.positive_int_list),
|
||
|
|
'class': directives.class_option,
|
||
|
|
'name': directives.unchanged,
|
||
|
|
'align': align}
|
||
|
|
|
||
|
|
def run(self):
|
||
|
|
if not self.content:
|
||
|
|
error = self.state_machine.reporter.error(
|
||
|
|
'The "%s" directive is empty; content required.' % self.name,
|
||
|
|
nodes.literal_block(self.block_text, self.block_text),
|
||
|
|
line=self.lineno)
|
||
|
|
return [error]
|
||
|
|
title, messages = self.make_title()
|
||
|
|
node = nodes.Element() # anonymous container for parsing
|
||
|
|
self.state.nested_parse(self.content, self.content_offset, node)
|
||
|
|
try:
|
||
|
|
num_cols, col_widths = self.check_list_content(node)
|
||
|
|
table_data = [[item.children for item in row_list[0]]
|
||
|
|
for row_list in node[0]]
|
||
|
|
header_rows = self.options.get('header-rows', 0)
|
||
|
|
stub_columns = self.options.get('stub-columns', 0)
|
||
|
|
self.check_table_dimensions(table_data, header_rows, stub_columns)
|
||
|
|
except SystemMessagePropagation as detail:
|
||
|
|
return [detail.args[0]]
|
||
|
|
table_node = self.build_table_from_list(table_data, col_widths,
|
||
|
|
header_rows, stub_columns)
|
||
|
|
if 'align' in self.options:
|
||
|
|
table_node['align'] = self.options.get('align')
|
||
|
|
table_node['classes'] += self.options.get('class', [])
|
||
|
|
self.set_table_width(table_node)
|
||
|
|
self.add_name(table_node)
|
||
|
|
if title:
|
||
|
|
table_node.insert(0, title)
|
||
|
|
return [table_node] + messages
|
||
|
|
|
||
|
|
def check_list_content(self, node):
|
||
|
|
if len(node) != 1 or not isinstance(node[0], nodes.bullet_list):
|
||
|
|
error = self.state_machine.reporter.error(
|
||
|
|
'Error parsing content block for the "%s" directive: '
|
||
|
|
'exactly one bullet list expected.' % self.name,
|
||
|
|
nodes.literal_block(self.block_text, self.block_text),
|
||
|
|
line=self.lineno)
|
||
|
|
raise SystemMessagePropagation(error)
|
||
|
|
list_node = node[0]
|
||
|
|
num_cols = 0
|
||
|
|
# Check for a uniform two-level bullet list:
|
||
|
|
for item_index in range(len(list_node)):
|
||
|
|
item = list_node[item_index]
|
||
|
|
if len(item) != 1 or not isinstance(item[0], nodes.bullet_list):
|
||
|
|
error = self.state_machine.reporter.error(
|
||
|
|
'Error parsing content block for the "%s" directive: '
|
||
|
|
'two-level bullet list expected, but row %s does not '
|
||
|
|
'contain a second-level bullet list.'
|
||
|
|
% (self.name, item_index + 1), nodes.literal_block(
|
||
|
|
self.block_text, self.block_text), line=self.lineno)
|
||
|
|
raise SystemMessagePropagation(error)
|
||
|
|
elif item_index:
|
||
|
|
if len(item[0]) != num_cols:
|
||
|
|
error = self.state_machine.reporter.error(
|
||
|
|
'Error parsing content block for the "%s" directive: '
|
||
|
|
'uniform two-level bullet list expected, but row %s '
|
||
|
|
'does not contain the same number of items as row 1 '
|
||
|
|
'(%s vs %s).'
|
||
|
|
% (self.name, item_index + 1, len(item[0]), num_cols),
|
||
|
|
nodes.literal_block(self.block_text, self.block_text),
|
||
|
|
line=self.lineno)
|
||
|
|
raise SystemMessagePropagation(error)
|
||
|
|
else:
|
||
|
|
num_cols = len(item[0])
|
||
|
|
col_widths = self.get_column_widths(num_cols)
|
||
|
|
return num_cols, col_widths
|
||
|
|
|
||
|
|
def build_table_from_list(self, table_data, col_widths, header_rows, stub_columns):
|
||
|
|
table = nodes.table()
|
||
|
|
if self.widths == 'auto':
|
||
|
|
table['classes'] += ['colwidths-auto']
|
||
|
|
elif self.widths: # "grid" or list of integers
|
||
|
|
table['classes'] += ['colwidths-given']
|
||
|
|
tgroup = nodes.tgroup(cols=len(col_widths))
|
||
|
|
table += tgroup
|
||
|
|
for col_width in col_widths:
|
||
|
|
colspec = nodes.colspec()
|
||
|
|
if col_width is not None:
|
||
|
|
colspec.attributes['colwidth'] = col_width
|
||
|
|
if stub_columns:
|
||
|
|
colspec.attributes['stub'] = 1
|
||
|
|
stub_columns -= 1
|
||
|
|
tgroup += colspec
|
||
|
|
rows = []
|
||
|
|
for row in table_data:
|
||
|
|
row_node = nodes.row()
|
||
|
|
for cell in row:
|
||
|
|
entry = nodes.entry()
|
||
|
|
entry += cell
|
||
|
|
row_node += entry
|
||
|
|
rows.append(row_node)
|
||
|
|
if header_rows:
|
||
|
|
thead = nodes.thead()
|
||
|
|
thead.extend(rows[:header_rows])
|
||
|
|
tgroup += thead
|
||
|
|
tbody = nodes.tbody()
|
||
|
|
tbody.extend(rows[header_rows:])
|
||
|
|
tgroup += tbody
|
||
|
|
return table
|