Documented csv import/export options from standard lib (#431)

docs/conf.py

@@ -22,7 +22,11 @@ from pkg_resources import get_distribution
 
 # Add any Sphinx extension module names here, as strings. They can be extensions
 # coming with Sphinx (named 'sphinx.ext.*') or your custom ones.
-extensions = ['sphinx.ext.autodoc', 'sphinx.ext.todo', 'sphinx.ext.coverage', 'sphinx.ext.viewcode']
+extensions = [
+    'sphinx.ext.autodoc', 'sphinx.ext.todo', 'sphinx.ext.coverage',
+    'sphinx.ext.viewcode', 'sphinx.ext.intersphinx'
+]
+intersphinx_mapping = {'python': ('https://docs.python.org/3', None)}
 
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ['_templates']

docs/formats.rst

@@ -21,6 +21,14 @@ When exporting with the ``csv`` format, the top row will contain headers, if
 they have been set. Otherwise, the top row will contain the first row of the
 dataset.
 
+When importing a CSV data source or exporting a dataset as CSV, you can pass any
+parameter supported by the :py:func:`csv.reader` and :py:func:`csv.writer`
+functions. For example::
+
+    tablib.import_set(your_data_stream, format='csv', dialect='unix')
+
+    dataset.export('csv', delimiter=' ', quotechar='|')
+
 .. admonition:: Line endings
 
      Exporting uses \\r\\n line endings by default so, make sure to include

tests/test_tablib.py

@@ -800,6 +800,12 @@ class CSVTests(BaseTestCase):
 
         self.assertEqual(csv, self.founders.csv)
 
+    def test_csv_export_options(self):
+        """Exporting support csv.writer() parameters."""
+        data.append(('1. a', '2. b', '3. c'))
+        result = data.export('csv', delimiter=' ', quotechar='|')
+        self.assertEqual(result, '|1. a| |2. b| |3. c|\r\n')
+
     def test_csv_stream_export(self):
         """Verify exporting dataset object as CSV from file object."""