get the name of a png image using glob and rsplit - string

Question

l have a set of images as follow :
1234_hello_BV56.png
1256_how_5t.png
l want to store in variable
labels only the names between '_'
to get hello , how
rest_left 1234 1256
rest right BV56 5t
to sum up.
for input like :
1234_hello_BV56.png
l want to get the following :
label=hello
rest_left=1234
rest_right=BV56
to do so l tried the following
import os
import glob
os.chdir(path)
images_name = glob.glob("*.png")
first try
set_img = set([x.rsplit('.', 1)[0] for x in images_name])
it only separte the whole world from png extenxion.
second try
label,sep,rest = img.partition('_')
It returns the first sequence before the firts '_'

Answer 1

UPDATE:
In [304]: left,labels,right = list(zip(*[os.path.splitext(x)[0].split('_')
for x in images_name]))
In [305]: left
Out[305]: ('1234', '1256')
In [306]: labels
Out[306]: ('hello', 'how')
In [307]: right
Out[307]: ('BV56', '5t')
Is that what you want?
In [266]: [os.path.splitext(x)[0].split('_') for x in images_name]
Out[266]: [['1234', 'hello', 'BV56'], ['1256', 'how', '5t']]