74 lines
2.1 KiB
Python
74 lines
2.1 KiB
Python
"""
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pyexcel_io.fileformat.csvz
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~~~~~~~~~~~~~~~~~~~~~~~~~~~
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The lower level csvz file format handler.
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:copyright: (c) 2014-2017 by Onni Software Ltd.
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:license: New BSD License, see LICENSE for more details
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"""
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import zipfile
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from pyexcel_io._compact import StringIO, PY2
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from pyexcel_io.book import BookWriter
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from pyexcel_io.constants import DEFAULT_SHEET_NAME, FILE_FORMAT_CSVZ
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from .csvw import CSVSheetWriter, UnicodeWriter
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class CSVZipSheetWriter(CSVSheetWriter):
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""" handle the zipfile interface """
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def __init__(self, zipfile, sheetname, file_extension, **keywords):
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self.file_extension = file_extension
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keywords["single_sheet_in_book"] = False
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CSVSheetWriter.__init__(self, zipfile, sheetname, **keywords)
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def set_sheet_name(self, name):
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self.content = StringIO()
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if PY2:
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self.writer = UnicodeWriter(
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self.content, encoding=self._encoding, **self._keywords
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)
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else:
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import csv
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self.writer = csv.writer(self.content, **self._keywords)
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def close(self):
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file_name = "%s.%s" % (self._native_sheet, self.file_extension)
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self.content.seek(0)
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self._native_book.writestr(file_name, self.content.read())
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self.content.close()
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class CSVZipBookWriter(BookWriter):
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"""
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csvz writer
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It is better to store csv files as a csvz as it saves your disk space.
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Pyexcel-io had the facility to unzip it for you or you could use
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any other unzip software.
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"""
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def __init__(self):
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BookWriter.__init__(self)
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self._file_type = FILE_FORMAT_CSVZ
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self.zipfile = None
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def open(self, file_name, **keywords):
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BookWriter.open(self, file_name, **keywords)
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self.zipfile = zipfile.ZipFile(file_name, "w", zipfile.ZIP_DEFLATED)
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def create_sheet(self, name):
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given_name = name
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if given_name is None:
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given_name = DEFAULT_SHEET_NAME
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writer = CSVZipSheetWriter(
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self.zipfile, given_name, self._file_type[:3], **self._keywords
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)
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return writer
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def close(self):
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self.zipfile.close()
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