isLandLine.py

import re 

def isLandLine(sentence):
  landLinePattern = re.compile(r'((91)((\d){2,4}))-([1-9][0-9]{5,8})')
  present = landLinePattern.search(sentence)
  std = len(present.group(1))
  phone = len(present.group(5))
  if (std+phone)==12:
    return True
  else: 
    return False
  

sentence = 'My number is 914462-521129'
landline_present = isLandLine(sentence)
if(landline_present)
  print("Landline number is present in the sentence")
else: 
	print("Landline Number is not present in the sentence")