title: Migration Guide sidebar_position: 12 id: python_migration license: | Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the “License”); you may not use this file except in compliance with the License. You may obtain a copy of the License at

 http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an “AS IS” BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

This page covers migration from pickle and JSON to pyfory.

From Pickle

Replace pickle with Fory for better performance while keeping the same API:

# Before (pickle)
import pickle
data = pickle.dumps(obj)
result = pickle.loads(data)

# After (Fory - drop-in replacement with better performance)
import pyfory
f = pyfory.Fory(xlang=False, ref=True, strict=False)
data = f.dumps(obj)      # Faster and more compact
result = f.loads(data)   # Faster deserialization

# Benefits:
# - 2-10x faster serialization
# - 2-5x faster deserialization
# - Up to 3x smaller data size
# - Same API, better performance

From JSON

Unlike JSON, Fory supports arbitrary Python types including functions:

# Before (JSON - limited types)
import json
data = json.dumps({"name": "Alice", "age": 30})
result = json.loads(data)

# After (Fory - all Python types)
import pyfory
f = pyfory.Fory()
data = f.dumps({"name": "Alice", "age": 30, "func": lambda x: x})
result = f.loads(data)

Key Differences

FeaturepickleJSONpyfory
PerformanceModerateSlowFast
Data SizeLargeLargeCompact
Type SupportAll PythonLimitedAll Python
Cross-LanguageNoYesYes (xlang mode)
SecurityLowHighConfigurable

Migration Tips

  1. Start with strict=False to ensure compatibility
  2. Add type registration for performance and security
  3. Test thoroughly before deploying
  4. Monitor performance improvements

Related Topics