def nullable_int(num):
"""
casts input to an int if not an accepted null value. See :func:tab.tab.cast_null
"""
try:
return cast_null(num)
except TypeError:
pass
return int(num)
def test_cast_null_error(self):
with self.assertRaises(TypeError):
cast_null('f')
def test_cast_null_ok(self):
self.assertEqual(None, cast_null('none'))
self.assertEqual(None, cast_null(None))
def nullable_int(row):
try:
row = int(row)
except ValueError:
row = tab.cast_null(row)
return row
def soft_cast_null(value):
try:
return tab.cast_null(value)
except TypeError:
return value