def convert_to_string(data, headers, **_):
"""Convert all *data* and *headers* to strings.
Binary data that cannot be decoded is converted to a hexadecimal
representation via :func:`binascii.hexlify`.
:param iterable data: An :term:`iterable` (e.g. list) of rows.
:param iterable headers: The column headers.
:return: The processed data and headers.
:rtype: tuple
"""
return (([utils.to_string(v) for v in row]
for row in data), [utils.to_string(h) for h in headers])
def test_to_string_non_bytes():
"""Test that to_string() converts non-bytes to a string."""
assert utils.to_string(1) == '1'
assert utils.to_string(2.29) == '2.29'
def test_to_string_bytes():
"""Test that to_string() converts bytes to a string."""
assert utils.to_string(b"foo") == 'foo'
