FredGrit

2026年3月3日

WPF custom VirtualizingGridPanel inherited from VirtualizingPanel and IScrollInfo,MeasureOverride and ArrangeOverride

摘要： public class VirtualizingGridPanel : VirtualizingPanel, IScrollInfo { public double ColumnWidth { get; set; } = 200; public double ItemHeight { get; s 阅读全文

posted @ 2026-03-03 22:13 FredGrit 阅读(22) 评论(0) 推荐(0)

Python json serialize write 100M items to json via batch

摘要： def append_data_list_to_json(json_file,start_idx,end_idx,is_first=False,is_last=False,data_list=[],batch_idx=""): json_str=json.dumps(data_list,indent 阅读全文

posted @ 2026-03-03 21:17 FredGrit 阅读(14) 评论(0) 推荐(0)

Python print full text via pprint

摘要： import uuid from datetime import datetime import os import psutil import threading import json import pprint def read_json_file_deserialize(json_file= 阅读全文

posted @ 2026-03-03 21:03 FredGrit 阅读(12) 评论(0) 推荐(0)

2026年2月25日

WPF implement DelCommand inherited from ICommand from scratch

摘要： public class DelCommand : ICommand { private Action<object?> execute; private Predicate<object?> canExecute; public DelCommand(Action<object?> execute 阅读全文

posted @ 2026-02-25 23:25 FredGrit 阅读(23) 评论(0) 推荐(0)

Python serialize list to json file and deserialize from json file to data list

摘要： import uuid from datetime import datetime import time import threading import json import psutil import os def get_mem(): pid=os.getpid() proc=psutil. 阅读全文

posted @ 2026-02-25 22:32 FredGrit 阅读(15) 评论(0) 推荐(0)

2026年2月23日

Python write 100M items data to csv file in batch

摘要： import uuid import time from datetime import datetime import threading from tkinter import messagebox import os import psutil import pandas as pd idx= 阅读全文

posted @ 2026-02-23 16:29 FredGrit 阅读(15) 评论(0) 推荐(0)

Python asyncio.run to implement asynchronous method

摘要： async def print_main(): while True: await asyncio.gather( print_time_uuid(), print_uuid_time() ) await asyncio.sleep(1) if __name__=="__main__": async 阅读全文

posted @ 2026-02-23 12:30 FredGrit 阅读(12) 评论(0) 推荐(0)

Python get incremented idx atomically via thread_locking and assign the value to the third variable withing thread lock to ensure thread safety

摘要： import time from datetime import datetime import threading import os import psutil import uuid from tkinter import messagebox import json idx=0 idx_lo 阅读全文

posted @ 2026-02-23 12:10 FredGrit 阅读(15) 评论(0) 推荐(0)

2026年2月22日

Python asyncio.gather returns a future aggregating results from the given coroutines/futures.

摘要： Return a future aggregating results from the given coroutines/futures. Coroutines will be wrapped in a future and scheduled in the event loop. They wi 阅读全文

posted @ 2026-02-22 21:53 FredGrit 阅读(20) 评论(0) 推荐(0)

Python threading.Thread(target=lambda:[])

摘要： import time from datetime import datetime import threading import uuid idx=0 idx_lock=threading.Lock() def get_idx(): global idx idx+=1 current_idx=id 阅读全文

posted @ 2026-02-22 21:40 FredGrit 阅读(15) 评论(0) 推荐(0)

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