def test_partial_serialization_on_error(self):
io = StringIO()
try:
jsonlib.dump([object()], io)
except UnknownSerializerError:
pass
self.assertEqual(io.getvalue(), '[')
def test_fixed_truncation_error(self):
data = [{"a": 3}] * 270
fp = io.StringIO()
jsonlib.dump(data, fp, encoding=None)
self.assertEqual(len(read(fp.getvalue())), len(data))
self.assertEqual(len(read(write(data))), len(data))
def test_no_encoding_full_unicode(self):
io = StringIO()
value = jsonlib.dump([u"\u24CA"], io, encoding=None, ascii_only=False)
self.assertEqual(io.getvalue(), u'["\u24ca"]')
self.assertEqual(type(io.getvalue()), unicode)
def test_no_encoding(self):
io = StringIO()
value = jsonlib.dump([u"\u24CA"], io, encoding=None)
self.assertEqual(io.getvalue(), u'["\\u24ca"]')
self.assertEqual(type(io.getvalue()), unicode)
def test_encode_utf16_specialcased(self):
# Test that special cases that return pure ASCII are still
# re-encoded if needed.
io = StringIO()
value = jsonlib.dump([], io, encoding='utf-16-le')
self.assertEqual(io.getvalue(), '[\x00]\x00')
def test_serialize_complex_to_stream(self):
io = StringIO()
jsonlib.dump(["a", "b", u"c \U0001D11E \u24Ca", {"a": "b"}], io)
self.assertEqual(io.getvalue(),
'["a","b","c \\ud834\\udd1e \\u24ca",{"a":"b"}]')
def test_serialize_to_stream(self):
io = StringIO()
jsonlib.dump([], io)
self.assertEqual(io.getvalue(), '[]')
"""
如果你要处理的是文件而不是字符串，你可以使用 json.dump()
和 json.load() 来编码和解码JSON数据。例如
"""
import jsonlib
# 写入文件
data = {
'no': 1,
'name': 'Runoob',
'url': 'http://runoob.txt.com'
}
with open('data.json', 'w') as f:
jsonlib.dump(data, f)
# 读取数据
with open('data.json', 'r') as f:
data = jsonlib.loads(f)