# importing RegEx module
import re
# take list
my_list = ['@know*', 'pr#ogra!m^', '(py_th@on_3}']
# using regular expression to remove special characters
out_list = [re.sub(r'[^a-zA-Z0-9]','',string) for string in my_list]
# print list without special characters
print('List after removal of special characters:', out_list)