FredGrit

2025年12月12日

Python, extract dataframe via column names and extract rows via iloc

摘要： import uuid import pandas as pd import numpy as np from datetime import datetime #show all rows when print pd.set_option('display.max_rows',None) book 阅读全文

posted @ 2025-12-12 21:06 FredGrit 阅读(14) 评论(0) 推荐(0)

WPF Datagrid, add new blank row via contextmenu command not perfect but can resolve the issue concisely

摘要： private void AddRowCommandExecuted(object? obj) { var dg = obj as DataGrid; if (dg != null) { if (dg.ItemsSource is IList list) { var itemType = list. 阅读全文

posted @ 2025-12-12 20:11 FredGrit 阅读(22) 评论(0) 推荐(0)

2025年12月10日

Python generate csv files and then convert csv files to excel files in batch

摘要： import pandas as pd from datetime import datetime import os import uuid import numpy as np csv_dir=r'D:\PY\CSV_1' excel_dir=r'D:\PY\EXCEL_1' def write 阅读全文

posted @ 2025-12-10 23:00 FredGrit 阅读(12) 评论(0) 推荐(0)

Python threading.Lock() thread lambda

摘要： import uuid from datetime import datetime import time import threading print(datetime.now().strftime('%Y%m%d%H%M%S%f')) idx=0 idx_lock=threading.Lock( 阅读全文

posted @ 2025-12-10 21:30 FredGrit 阅读(7) 评论(0) 推荐(0)

Python list all files in dir recursivelly

摘要： import os idx=0 def list_dir_files(dir_name): global idx if os.path.exists(dir_name): all_items=os.listdir(dir_name) for item in all_items: full_path= 阅读全文

posted @ 2025-12-10 21:12 FredGrit 阅读(18) 评论(0) 推荐(0)

Python Flask service provide data list and retrieve and display in chrome via html and javascript

摘要： //flask from flask import Flask,jsonify,send_from_directory from flask_cors import CORS import uuid import time import os import pandas as pd import c 阅读全文

posted @ 2025-12-10 00:00 FredGrit 阅读(10) 评论(0) 推荐(0)

2025年12月8日

Python service Flask generate list data and display in web view via html and javscript

摘要： python -m pip install flask python -m pip install flask-cors //Flask from flask import Flask,jsonify,send_from_directory from flask_cors import CORS i 阅读全文

posted @ 2025-12-08 21:14 FredGrit 阅读(11) 评论(0) 推荐(0)

2025年12月5日

C# WebAPI generate services,render in Chrome via html and javascript

摘要： //WebAPI namespace BooksServices { public class Program { public static void Main(string[] args) { Console.WriteLine(DateTime.Now); var builder = WebA 阅读全文

posted @ 2025-12-05 00:21 FredGrit 阅读(10) 评论(0) 推荐(0)

2025年12月4日

C# WebAPI generate web api and invoke via console

摘要： 1.New WebApi solution,add controller,BooksController namespace BooksServices.Models { public class Book { public int Id { get; set; } public string Na 阅读全文

posted @ 2025-12-04 23:48 FredGrit 阅读(8) 评论(0) 推荐(0)

Python serialize list directly without constructor function __init__(self)

摘要： import uuid from datetime import datetime import json def main(cnt=1000000): t1=datetime.now() print(f'start at {t1}') book_list=[] for i in range(1,c 阅读全文

posted @ 2025-12-04 22:47 FredGrit 阅读(14) 评论(0) 推荐(0)

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