Python TTK TreeView排序号码
题
我正在尝试使用TTK.TreeView排序函数在此问题的答案中所示( tktreeview列排序),它适用于'abc','bcd','cde'等字符串,但是当我尝试对数字进行排序时,它最终显示如下:
1
10
11
2
3
...
.
我想要排序的数据,以使输出为:
1
2
3
...
10
11
.
我知道TreeView列中的值是字符串,并且我很可能需要在排序之前将它们转换为整数,但我无法弄清楚如何做到这一点。
解决方案
list.sort
方法, sorted
函数接受可选的key
参数。函数的返回值用作比较密钥。
指定将treeview项目转换为数字的key
函数将解决您的问题。
示例:
try:
from tkinter import *
from tkinter import ttk
except ImportError:
from Tkinter import *
import ttk
def treeview_sort_column(tv, col, reverse):
l = [(tv.set(k, col), k) for k in tv.get_children('')]
l.sort(key=lambda t: int(t[0]), reverse=reverse)
# ^^^^^^^^^^^^^^^^^^^^^^^
for index, (val, k) in enumerate(l):
tv.move(k, '', index)
tv.heading(col,
command=lambda: treeview_sort_column(tv, col, not reverse))
root = Tk()
columns = ('number',)
treeview = ttk.Treeview(root, columns=columns, show='headings')
for t in ('1', '10', '11', '2', '3'):
treeview.insert('', END, values=(t,))
treeview.pack()
for col in columns:
treeview.heading(col, text=col,
command=lambda c=col: treeview_sort_column(treeview, c, False))
mainloop()
.
其他提示
I figure I'd add this bit of code for anyone wanting to use the above solution for both regular string sorts and numeric sorts.
def treeview_sort_column(tv, col, reverse):
l = [(tv.set(k, col), k) for k in tv.get_children('')]
try:
l.sort(key=lambda t: int(t[0]), reverse=reverse)
# ^^^^^^^^^^^^^^^^^^^^^^^
except ValueError:
l.sort(reverse=reverse)
for index, (val, k) in enumerate(l):
tv.move(k, '', index)
tv.heading(col, command=lambda: treeview_sort_column(tv, col, not reverse))
It took me a while to find a variant of this answer, but I thought I would post an answer for those looking to sort dates as a string (i.e. 'DD/MM/YYYY')
import datetime
def treeview_sort_column(tv, col, reverse):
l = [(tv.set(k, col), k) for k in tv.get_children('')]
l.sort(key=lambda: x, datetime.datetime.strptime(x[0], '%d/%m/%y'), reverse=reverse)
for index, (val, k) in enumerate(l):
tv.move(k, '', index)
tv.heading(col, command=lambda: treeview_sort_column(tv, col, not reverse))
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