我正在尝试对列表进行排序:
[
'[fc] EDW Ratio (10 degrees)',
' [fc] EDW Ratio (45 degrees)',
' [fc] EDW Ratio (60 degrees)',
' [fc] EDW Ratio (25 degrees)',
' [fc] EDW Ratio (20 degrees)',
' [fc] EDW Ratio (30 degrees)',
' [fc] EDW Ratio (15 degrees)',
' [fc] EDW output factor (60 degrees)',
' [fc] Quality index'
]
使用接受的答案here的第一部分:
但是列表最终是这样的:
[
' [fc] EDW Ratio (15 degrees)',
' [fc] EDW Ratio (20 degrees)',
' [fc] EDW Ratio (25 degrees)',
' [fc] EDW Ratio (30 degrees)',
' [fc] EDW Ratio (45 degrees)',
' [fc] EDW Ratio (60 degrees)',
' [fc] EDW output factor (60 degrees)',
' [fc] Quality index',
'[fc] EDW Ratio (10 degrees)'
]
我希望 EDW比率(10度) 在排序后结束于列表的开头(索引位置0)。
这怎么办?
我的代码包括以下内容:
#
# Method to define natural sorting used to sort lists
#
def atoi(text):
return int(text) if text.isdigit() else text
def natural_keys(text):
'''
alist.sort(key=natural_keys) sorts in human order
http://nedbatchelder.com/blog/200712/human_sorting.html
(See Toothy's implementation in the comments)
'''
return [ atoi(c) for c in re.split(r'(\d+)', text) ]
.
.
.
tname_list = test_names.split(",") # this outputs the exact first (unsorted) list shown above
tname_list.sort(key=natural_keys) # use human sorting defined above. This outputs the second list shown above.
答案 0 :(得分:3)
您的代码是正确的,但是您的数据看起来不正确:所有条目都有一个前导空格,这意味着它们在您至少确定的那个条目“之前”,实际上没有前导空格。
如果数据正常,我建议您修改代码以忽略前导空格(请检查:How do I remove leading whitespace in Python?)。
答案 1 :(得分:0)
您需要修改natural_keys
以仅将字符串的数字部分作为int
返回。您应该使用int()
进行转换,而不要使用atoi()
来返回字符的ascii代码。
答案 2 :(得分:0)
如果任何字符串包含多个数字,或者将数字放在字符串的开头或结尾,您将遇到麻烦。这是因为Python无法将int
和str
相互比较。您的键函数应该以元组或列表的形式返回。
def atoi(text):
return (int(text), '') if text.isdigit() else (math.nan, text)
math.nan
很特殊,因为它的比较绝不会小于实际数字。
答案 3 :(得分:0)
我建议使用natsort
(完整披露,我是作者)。您的数据也有些混乱,您需要删除前导空格以标准化所有条目。
from natsort import natsorted
data = [
'[fc] EDW Ratio (10 degrees)',
' [fc] EDW Ratio (45 degrees)',
' [fc] EDW Ratio (60 degrees)',
' [fc] EDW Ratio (25 degrees)',
' [fc] EDW Ratio (20 degrees)',
' [fc] EDW Ratio (30 degrees)',
' [fc] EDW Ratio (15 degrees)',
' [fc] EDW output factor (60 degrees)',
' [fc] Quality index'
]
data_sorted = natsorted(data, key=lambda x: x.lstrip())
输出
[
'[fc] EDW Ratio (10 degrees)',
' [fc] EDW Ratio (15 degrees)',
' [fc] EDW Ratio (20 degrees)',
' [fc] EDW Ratio (25 degrees)',
' [fc] EDW Ratio (30 degrees)',
' [fc] EDW Ratio (45 degrees)',
' [fc] EDW Ratio (60 degrees)',
' [fc] EDW output factor (60 degrees)',
' [fc] Quality index',
]
答案 4 :(得分:0)
import re
def get_numbers(texto):
return int(re.findall(r'[0-9]+', texto)[0])
def sort_list(l):
dicto = {}
for i in l:
dicto[get_numbers(i)] = i
lista = []
for i in sorted(list(dicto.keys())):
lista.append(dicto[i])
return lista
sort_list(frames)
请注意,它仅适用于第一组数字......“peter123jjj111”将只考虑 123