python - 匹配模式后如何根据另一个列表中的预定义顺序对文件名列表进行排序？

Question

我正在尝试对栅格列表(rasters)进行排序

 rasters = '["example\\\\alt_canal.tif", "example\\\\back_garden.tif", "example\\\\main_entrance.tif", "example\\\\my_ditch.tif", "example\\\\ne_lawn.tif"]'

基于模式匹配和预定义顺序 (ras_order)。

ras_order = '["ditch", "canal", "entrance", "garden", "lawn"]'

我关注了这个answer但它没有给我我想要的。任何帮助表示赞赏。谢谢!

预期输出:

[u'example\my_ditch.tif', u'example\alt_canal.tif', u'example\main_entrance.tif', u'example\back_garden.tif', u'example\ne_lawn.tif']

示例代码:

import os
import arcpy

arcpy.CheckOutExtension("Spatial")  

# set project directory
working_dir = os.path.expanduser('~/Documents/')
scenario = 'example'
env.workspace = os.path.join(working_dir, scenario)

# predefined order
ras_order = ['ditch', 'canal', 'entrance', 'garden', 'lawn']

# find rasters in the working_dir 
rasters = []  
walk = arcpy.da.Walk(os.path.join(working_dir, scenario), topdown=True, datatype="RasterDataset")  
for dirpath, dirnames, filenames in walk:  
    for filename in filenames:  
        rasters.append(os.path.join(dirpath, filename))  

print(rasters)

# [u'example\\alt_canal.tif', u'example\\back_garden.tif', u'example\\main_entrance.tif', u'example\\my_ditch.tif', u'example\\ne_lawn.tif']

# sort based on predefined order (not working)
new_order1 = [x for _, x in sorted(zip(ras_order, rasters))]
print(new_order1)

# [u'example\\back_garden.tif', u'example\\alt_canal.tif', u'example\\main_entrance.tif', u'example\\my_ditch.tif', u'example\\ne_lawn.tif']

除了@Lante的答案之外，还有另一种方法:

new_raster = []
for i in ras_order:
    for j in rasters:
        if i in j:
            new_raster.append(j)
new_raster

[u'example\\\\Max (dec).my_ditch.tif',
 u'example\\\\Max (dec).alt_canal.tif',
 u'example\\\\Max (dec).main_entrance.tif',
 u'example\\\\Max (dec).back_garden.tif',
 u'example\\\\Max (dec).ne_lawn.tif']

Answer 1

这是一个简单的解决方案，可以使用正则表达式进行改进以实现更精确的匹配:

rasters = ["example\\\\alt_canal.tif", "example\\\\back_garden.tif", "example\\\\main_entrance.tif", "example\\\\my_ditch.tif", "example\\\\ne_lawn.tif"]
ras_order = ["ditch", "canal", "entrance", "garden", "lawn"]

def ras_match(r, o):
    return next(i for i, x in enumerate(o) if x in r)

sorted(rasters, key=lambda x: ras_match(x, ras_order))

输出:

['example\\\\my_ditch.tif',
 'example\\\\alt_canal.tif',
 'example\\\\main_entrance.tif',
 'example\\\\back_garden.tif',
 'example\\\\ne_lawn.tif']