pickle – SyntaxBug

Solving ForkingPickler(file, protocol).dump(obj) TypeError: cant pickle Environment objects

Table of Contents Solving ForkingPickler(file, protocol).dump(obj) TypeError: cant pickle Environment objects Error background Solution Summarize Solve ForkingPickler(file, protocol).dump(obj) TypeError: cant pickle Environment objects In Python parallel programming, if you need to transfer objects between multiple processes, you often use the pickle module to serialize and deserialize objects. However, sometimes when using pickle for serialization, you […]

Python+Pickle/Parquet/HDF5…Comparison of quantization factor calculation performance under different file format storage modes

In quantitative trading, high-frequency factor calculation based on financial market L1/L2 quotations and transaction high-frequency data is a common investment research requirement. As the amount of financial market data continues to increase, traditional relational databases have been unable to meet the storage and query needs of large-scale data. In order to cope with this challenge, […]

_pickle.UnpicklingError: STACK_GLOBAL requires str

Problem details Scaled weight_decay = 0.0005 Optimizer groups: 95 .bias, 95 conv.weight, 98 other Traceback (most recent call last): File “E:\yolov7-main\train.py”, line 616, in <module> train(hyp, opt, device, tb_writer) File “E:\yolov7-main\train.py”, line 245, in train dataloader, dataset = create_dataloader(train_path, imgsz, batch_size, gs, opt, File “E:\yolov7-main\utils\datasets.py”, line 69, in create_dataloader dataset = LoadImagesAndLabels(path, imgsz, batch_size, File […]

Serialization module, pickle module, hashlib module in Python

1. Serialization module What is serialization? What is sequence? A sequence is a string Serialization is the process of converting other data types into json strings What is deserialization? The process of converting json strings to other data types is deserialization json string json object To convert other data types to json in Python, you […]

Serialization, pickle, hashlib modules

Serialization module What is serialization? The process of converting the original dictionary, list, etc. into a string is called serialization. Why do we need a serialization module For example, a piece of data we calculated in the python code needs to be used by another program, so how do we give it to it? The […]

Python pickle module and hashlib module

1. Serialization module 1. What is sequence and what is serialization A sequence is a string Serialization is the process of converting other data types into json strings 2. What is deserialization The process of converting json strings to other data types is deserialization 3. Not all data types in Python can be serialized into […]

python-time module, random, os, sys, shutil, json and pickle modules

1. Time and datetime modules time module: Timestamp: represents the offset calculated in seconds from 00:00:00 on January 1, 1970, and the return type is float. Format time string (Format String) Structured time (struct_time): The struct_time tuple has a total of 9 elements (year, month, day, hour, minute, second, week of the year, day of […]

Resolved TypeError: cant pickle _thread.lock objects

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pickle deserialization RCE analysis

pickle deserialization 1. pickle module 1.1 What is the pickle module? 1.2 Common functions 1.3 Magic methods 2. Example questions [[BUUOJ]HFCTF 2021 Final] 2.1 Question analysis 2.2 payload 3. Opcode writing 3.1 Why use opcode 3.2 What is opcode 3.3 Common commands 3.4 opcode execution principle 3.5 R command is prohibited and bypassed 3.6 Construction […]