import re # Regular Expression *** regex *** is powerful library for string operation ..

def alphanumeric(x):

  return re.sub('[^A-Za-z0-9]+',' ',(str(x)))# here the sting operation for x in the alphanumeric(x) ** i guessed **

data_1['Model'] = data_1.Model.apply(lambda x: alphanumeric(x))# Here x: for assigning the x value of alphanumeric(x) ** i guessed **

# Each value from 'Model' column gets passed through the alphanumeric function