Adding upstream version 2.1.0.

Signed-off-by: Daniel Baumann <daniel@debian.org>

cli_helpers/tabular_output/delimited_output_adapter.py

@@ -0,0 +1,48 @@
+# -*- coding: utf-8 -*-
+"""A delimited data output adapter (e.g. CSV, TSV)."""
+
+from __future__ import unicode_literals
+import contextlib
+
+from cli_helpers.compat import csv, StringIO
+from cli_helpers.utils import filter_dict_by_key
+from .preprocessors import bytes_to_string, override_missing_value
+
+supported_formats = ('csv', 'csv-tab')
+preprocessors = (override_missing_value, bytes_to_string)
+
+
+class linewriter(object):
+    def __init__(self):
+        self.reset()
+
+    def reset(self):
+        self.line = None
+
+    def write(self, d):
+        self.line = d
+
+
+def adapter(data, headers, table_format='csv', **kwargs):
+    """Wrap the formatting inside a function for TabularOutputFormatter."""
+    keys = ('dialect', 'delimiter', 'doublequote', 'escapechar',
+            'quotechar', 'quoting', 'skipinitialspace', 'strict')
+    if table_format == 'csv':
+        delimiter = ','
+    elif table_format == 'csv-tab':
+        delimiter = '\t'
+    else:
+        raise ValueError('Invalid table_format specified.')
+
+    ckwargs = {'delimiter': delimiter, 'lineterminator': ''}
+    ckwargs.update(filter_dict_by_key(kwargs, keys))
+
+    l = linewriter()
+    writer = csv.writer(l, **ckwargs)
+    writer.writerow(headers)
+    yield l.line
+
+    for row in data:
+        l.reset()
+        writer.writerow(row)
+        yield l.line