/usr/share/pyshared/openpyxl/reader/excel.py is in python-openpyxl 1.7.0+ds1-1.
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# Copyright (c) 2010-2011 openpyxl
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
# @license: http://www.opensource.org/licenses/mit-license.php
# @author: see AUTHORS file
"""Read an xlsx file into Python"""
# Python stdlib imports
from zipfile import ZipFile, ZIP_DEFLATED, BadZipfile
from sys import exc_info
import warnings
# compatibility imports
from openpyxl.shared.compat import file
# package imports
from openpyxl.shared.exc import OpenModeError, InvalidFileException
from openpyxl.shared.ooxml import (ARC_SHARED_STRINGS, ARC_CORE, ARC_WORKBOOK,
PACKAGE_WORKSHEETS, ARC_STYLE, ARC_THEME,
ARC_CONTENT_TYPES)
from openpyxl.shared.compat import unicode, file, BytesIO, StringIO
from openpyxl.workbook import Workbook, DocumentProperties
from openpyxl.reader.strings import read_string_table
from openpyxl.reader.style import read_style_table
from openpyxl.reader.workbook import (read_sheets_titles, read_named_ranges,
read_properties_core, read_excel_base_date, get_sheet_ids,
read_content_types)
from openpyxl.reader.worksheet import read_worksheet
from openpyxl.reader.iter_worksheet import unpack_worksheet
# Use exc_info for Python 2 compatibility with "except Exception[,/ as] e"
VALID_WORKSHEET = "application/vnd.openxmlformats-officedocument.spreadsheetml.worksheet+xml"
VALID_CHARTSHEET = "application/vnd.openxmlformats-officedocument.spreadsheetml.chartsheet+xml"
WORK_OR_CHART_TYPE = [VALID_WORKSHEET, VALID_CHARTSHEET]
CENTRAL_DIRECTORY_SIGNATURE = '\x50\x4b\x05\x06'
def repair_central_directory(zipFile, is_file_instance):
''' trims trailing data from the central directory
code taken from http://stackoverflow.com/a/7457686/570216, courtesy of Uri Cohen
'''
f = zipFile if is_file_instance else open(zipFile, 'r+b')
data = f.read()
if hasattr(data, "decode"):
data = data.decode("utf-8")
pos = data.find(CENTRAL_DIRECTORY_SIGNATURE) # End of central directory signature
if (pos > 0):
sio = StringIO(data)
sio.seek(pos + 22) # size of 'ZIP end of central directory record'
sio.truncate()
sio.seek(0)
return sio
f.seek(0)
return f
def load_workbook(filename, use_iterators=False, keep_vba=False, guess_types=True):
"""Open the given filename and return the workbook
:param filename: the path to open or a file-like object
:type filename: string or a file-like object open in binary mode c.f., :class:`zipfile.ZipFile`
:param use_iterators: use lazy load for cells
:type use_iterators: bool
:param keep_vba: preseve vba content (this does NOT mean you can use it)
:type keep_vba: bool
:param guess_types: guess cell content type and do not read it from the file
:type guess_types: bool
:rtype: :class:`openpyxl.workbook.Workbook`
.. note::
When using lazy load, all worksheets will be :class:`openpyxl.reader.iter_worksheet.IterableWorksheet`
and the returned workbook will be read-only.
"""
is_file_instance = isinstance(filename, file)
if is_file_instance:
# fileobject must have been opened with 'rb' flag
# it is required by zipfile
if 'b' not in filename.mode:
raise OpenModeError("File-object must be opened in binary mode")
try:
archive = ZipFile(filename, 'r', ZIP_DEFLATED)
except BadZipfile:
try:
f = repair_central_directory(filename, is_file_instance)
archive = ZipFile(f, 'r', ZIP_DEFLATED)
except BadZipfile:
e = exc_info()[1]
raise InvalidFileException(unicode(e))
except (BadZipfile, RuntimeError, IOError, ValueError):
e = exc_info()[1]
raise InvalidFileException(unicode(e))
wb = Workbook(guess_types=guess_types)
if use_iterators:
wb._set_optimized_read()
if not guess_types:
warnings.warn('please note that data types are not guessed '
'when using iterator reader, so you do not need '
'to use guess_types=False')
try:
_load_workbook(wb, archive, filename, use_iterators, keep_vba)
except KeyError:
e = exc_info()[1]
raise InvalidFileException(unicode(e))
if not keep_vba:
archive.close()
return wb
def _load_workbook(wb, archive, filename, use_iterators, keep_vba):
valid_files = archive.namelist()
# If are going to preserve the vba then attach the archive to the
# workbook so that is available for the save.
if keep_vba:
wb.vba_archive = archive
# get workbook-level information
try:
wb.properties = read_properties_core(archive.read(ARC_CORE))
wb.read_workbook_settings(archive.read(ARC_WORKBOOK))
except KeyError:
wb.properties = DocumentProperties()
try:
string_table = read_string_table(archive.read(ARC_SHARED_STRINGS))
except KeyError:
string_table = {}
try:
wb.loaded_theme = archive.read(ARC_THEME) # some writers don't output a theme, live with it (fixes #160)
except KeyError:
assert wb.loaded_theme == None, "even though the theme information is missing there is a theme object ?"
style_table = read_style_table(archive.read(ARC_STYLE))
wb.properties.excel_base_date = read_excel_base_date(xml_source=archive.read(ARC_WORKBOOK))
# get worksheets
wb.worksheets = [] # remove preset worksheet
content_types = read_content_types(archive.read(ARC_CONTENT_TYPES))
sheet_types = [(sheet, contyp) for sheet, contyp in content_types if contyp in WORK_OR_CHART_TYPE]
sheet_names = read_sheets_titles(archive.read(ARC_WORKBOOK))
worksheet_names = [worksheet for worksheet, sheet_type in zip(sheet_names, sheet_types) if sheet_type[1] == VALID_WORKSHEET]
for i, sheet_name in enumerate(worksheet_names):
sheet_codename = 'sheet%d.xml' % (i + 1)
worksheet_path = '%s/%s' % (PACKAGE_WORKSHEETS, sheet_codename)
if not worksheet_path in valid_files:
continue
if not use_iterators:
new_ws = read_worksheet(archive.read(worksheet_path), wb, sheet_name, string_table, style_table, keep_vba=keep_vba)
else:
xml_source = unpack_worksheet(archive, worksheet_path)
new_ws = read_worksheet(xml_source, wb, sheet_name, string_table, style_table, filename, sheet_codename)
wb.add_sheet(new_ws, index=i)
wb._named_ranges = read_named_ranges(archive.read(ARC_WORKBOOK), wb)
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