49 lines
1.3 KiB
Python
49 lines
1.3 KiB
Python
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# -*- coding: utf-8 -*-
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"""A delimited data output adapter (e.g. CSV, TSV)."""
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from __future__ import unicode_literals
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import contextlib
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from cli_helpers.compat import csv, StringIO
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from cli_helpers.utils import filter_dict_by_key
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from .preprocessors import bytes_to_string, override_missing_value
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supported_formats = ('csv', 'csv-tab')
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preprocessors = (override_missing_value, bytes_to_string)
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class linewriter(object):
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def __init__(self):
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self.reset()
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def reset(self):
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self.line = None
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def write(self, d):
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self.line = d
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def adapter(data, headers, table_format='csv', **kwargs):
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"""Wrap the formatting inside a function for TabularOutputFormatter."""
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keys = ('dialect', 'delimiter', 'doublequote', 'escapechar',
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'quotechar', 'quoting', 'skipinitialspace', 'strict')
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if table_format == 'csv':
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delimiter = ','
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elif table_format == 'csv-tab':
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delimiter = '\t'
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else:
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raise ValueError('Invalid table_format specified.')
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ckwargs = {'delimiter': delimiter, 'lineterminator': ''}
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ckwargs.update(filter_dict_by_key(kwargs, keys))
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l = linewriter()
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writer = csv.writer(l, **ckwargs)
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writer.writerow(headers)
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yield l.line
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for row in data:
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l.reset()
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writer.writerow(row)
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yield l.line
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