[PyQt] How to make sort working when click the column

[不坏阿峰]

Dear all

i have use Qtablewidget to display my data.  while in the tablewidget it is
store like string.
when click the column ,it sort by alphabetical order  not by numerically.

so how to make it work ?  it is useful for sort numerically than alphabetical
order.


hope some one can help me solve this.

thanks a lot
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