100 lines
2.3 KiB
Python
100 lines
2.3 KiB
Python
# -*- coding: utf-8 -*-
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""" Tablib - XLS Support.
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"""
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import sys
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from tablib.compat import BytesIO, xlwt, xlrd, XLRDError
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import tablib
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title = 'xls'
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extentions = ('xls',)
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# special styles
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wrap = xlwt.easyxf("alignment: wrap on")
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bold = xlwt.easyxf("font: bold on")
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def detect(stream):
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"""Returns True if given stream is a readable excel file."""
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try:
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xlrd.open_workbook(file_contents=stream)
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return True
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except (TypeError, XLRDError):
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pass
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try:
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xlrd.open_workbook(file_contents=stream.read())
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return True
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except (AttributeError, XLRDError):
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pass
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try:
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xlrd.open_workbook(filename=stream)
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return True
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except:
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return False
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def export_set(dataset):
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"""Returns XLS representation of Dataset."""
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wb = xlwt.Workbook(encoding='utf8')
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ws = wb.add_sheet(dataset.title if dataset.title else 'Tablib Dataset')
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dset_sheet(dataset, ws)
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stream = BytesIO()
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wb.save(stream)
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return stream.getvalue()
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def export_book(databook):
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"""Returns XLS representation of DataBook."""
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wb = xlwt.Workbook(encoding='utf8')
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for i, dset in enumerate(databook._datasets):
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ws = wb.add_sheet(dset.title if dset.title else 'Sheet%s' % (i))
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dset_sheet(dset, ws)
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stream = BytesIO()
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wb.save(stream)
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return stream.getvalue()
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def dset_sheet(dataset, ws):
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"""Completes given worksheet from given Dataset."""
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_package = dataset._package(dicts=False)
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for i, sep in enumerate(dataset._separators):
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_offset = i
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_package.insert((sep[0] + _offset), (sep[1],))
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for i, row in enumerate(_package):
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for j, col in enumerate(row):
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# bold headers
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if (i == 0) and dataset.headers:
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ws.write(i, j, col, bold)
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# frozen header row
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ws.panes_frozen = True
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ws.horz_split_pos = 1
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# bold separators
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elif len(row) < dataset.width:
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ws.write(i, j, col, bold)
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# wrap the rest
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else:
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try:
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if '\n' in col:
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ws.write(i, j, col, wrap)
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else:
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ws.write(i, j, col)
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except TypeError:
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ws.write(i, j, col)
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