What is the opposite of GROUP_CONCAT in MySQL?

You could use a query like this: SELECT id, SUBSTRING_INDEX(SUBSTRING_INDEX(colors, ‘,’, n.digit+1), ‘,’, -1) color FROM colors INNER JOIN (SELECT 0 digit UNION ALL SELECT 1 UNION ALL SELECT 2 UNION ALL SELECT 3) n ON LENGTH(REPLACE(colors, ‘,’ , ”)) <= LENGTH(colors)-n.digit ORDER BY id, n.digit Please see fiddle here. Please notice that this query … Read more

Why does Python have a format function as well as a format method

tldr; format just calls obj.__format__ and is used by the str.format method which does even more higher level stuff. For the lower level it makes sense to teach an object how to format itself. It is just syntactic sugar The fact that this function shares the name and format specification with str.format can be misleading. … Read more

pandas xlsxwriter, format table header – not sheet header

I think you need first reset default header style, then you can change it: pd.core.format.header_style = None All together: import pandas as pd data = pd.DataFrame({‘test_data’: [1,2,3,4,5]}) writer = pd.ExcelWriter(‘test.xlsx’, engine=”xlsxwriter”) pd.core.format.header_style = None data.to_excel(writer, sheet_name=”test”, index=False) workbook = writer.book worksheet = writer.sheets[‘test’] font_fmt = workbook.add_format({‘font_name’: ‘Arial’, ‘font_size’: 10}) header_fmt = workbook.add_format({‘font_name’: ‘Arial’, ‘font_size’: 10, … Read more

Set Default DateTime Format c#

The “default format” of a datetime is: ShortDatePattern + ‘ ‘ + LongTimePattern at least in the current mono implementation. This is particularly painful in case you want to display something like 2001-02-03T04:05:06Z i.e. the date and time combined as specified in ISO 8606, but not a big problem in your case: using System; using … Read more

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