- 实现功能:输入为图像路径列表,根据图像名称中的数字大小实现图像路径的排序
from functools import cmp_to_key
def get_suffix(filename):
"""a.jpg -> jpg"""
pos = filename.rfind('.')
if pos == -1:
return ''
return filename[pos:]
'''
求两个字符串的最长公共子串
思想:建立一个二维数组,保存连续位相同与否的状态
'''
def get_num_of_common_substr(str1, str2):
lstr1 = len(str1)
lstr2 = len(str2)
record = [[0 for i in range(lstr2+1)] for j in range(lstr1+1)] # 多一位
maxNum = 0 # 最长匹配长度
p = 0 # 匹配的起始位
for i in range(lstr1):
for j in range(lstr2):
if str1[i] == str2[j] and not str1[i].isdigit():
# 相同则累加
record[i+1][j+1] = record[i][j] + 1
if record[i+1][j+1] > maxNum:
# 获取最大匹配长度
maxNum = record[i+1][j+1]
# 记录最大匹配长度的终止位置
p = i + 1
return str1[p-maxNum:p]
#给出一个绝对路径格式 .../.../color1.png .../.../color20.png 找到图像名中数字的位置,比较数字大小
def sort_by_index(str1,str2):
suffix = get_suffix(str1)
str_1 = str1.split("/")[-1].replace(f'{suffix}',"")
str_2 = str2.split("/")[-1].replace(f'{suffix}',"")
sub_str = get_num_of_common_substr(str_1,str_2)
int_str1 = int(str_1.replace(f'{sub_str}',"")) if len(str_1.replace(f'{sub_str}',"")) else 0
int_str2 = int(str_2.replace(f'{sub_str}',"")) if len(str_2.replace(f'{sub_str}',"")) else 0
return int_str1-int_str2
if __name__ == '__main__':
str_list = ["a/b/c/color15.png","a/b/c/color2.png","a/b/c/color13.png","a/b/c/color1.png"]
str_list.sort(key=cmp_to_key(sort_by_index))
print(str_list)