Python String handling tip, remove specific character forward and backward in string

So, this is example code for this processing

input string
__A b c_D___

output string
A b c_D

'_' character is removed in forward and backward.

Refer to code. 🤘
Thank you.

testStr = [' Abc ', ' ', ' ', 'A bc', 'A bc ', ' ', ' a 12 43', ' da ', ' ', 'a2 34', ' 1 2 ']

testStr2 = ['___Abc__', '_', '__', 'A_bc', 'A_bc_', '_____', '_a_12_43', '_da____', '__', 'a2_34', '_1_2_']

def removeTFoward(str, T):

if len(str) == 0:

return str

if str[0] == T:

return removeTFoward(str[1:],T)

else:

return str

def removeTBackword(str, T):

if len(str) == 0:

return str

if str[-1] == T:

return removeTBackword(str[:-1],T)

else:

return str

for n, v in enumerate(testStr2):

str = removeTFoward(v, '_')

str = removeTBackword(str, '_')

if len(str) == 0:

print('nothing')

else:

print(str)

output :
Abc
nothing
nothing
A_bc
A_bc
nothing
a_12_43
da
nothing
a2_34
1_2