如何删除/替换字符串中第n个特殊字符之前和之后的字符串？

Question

如何使用Python Replace方法删除第三个_及其之前的所有字符串以及第四个_及其之后的所有字符串

st = "the_gis_osm_natural_a_free_1.shp"

Answer 1

You could split the string by _ and then join the result:

start, end = 3, 4
filename = "the_gis_osm_natural_a_free_1.shp"
print('_'.join(filename.split("_")[start:end]))

Output

natural