How to convert numeric string from a sublist in Python

I’m a freshie. I would like to convert a numeric string into int from a sublist in Python. But not getting accurate results. 😔

countitem = 0
list_samp = [['1','2','blue'],['1','66','green'],['1','88','purple']]

for list in list_samp:
  countitem =+1
  for element in list:
    convert_element = int(list_samp[countitem][0])
    list_samp[countitem][1] = convert_element

>Solution :

You can do it like this:

list_samp = [['1','2','blue'],['1','66','green'],['1','88','purple']]
me = [[int(u) if u.isdecimal() else u for u in v] for v in list_samp]
print(me)