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Python | Word location in String

  • Difficulty Level : Basic
  • Last Updated : 22 Apr, 2020

Sometimes, while working with Python strings, we can have problem in which we need to find location of a particular word. This can have application in domains such as day-day programming. Lets discuss certain ways in which this task can be done.

Method #1 : Using re.findall() + index()
This is one of the way in which we can find the location where word exists. In this we look for substring pattern using findall() and its position using index().

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# Python3 code to demonstrate working of 
# Word location in String
# Using findall() + index()
import re
  
# initializing string
test_str = 'geeksforgeeks is best for geeks'
  
# printing original string
print("The original string is : " + test_str)
  
# initializing word 
wrd = 'best'
  
# Word location in String
# Using findall() + index()
test_str = test_str.split()
res = -1
for idx in test_str:
    if len(re.findall(wrd, idx)) > 0:
        res = test_str.index(idx) + 1
  
# printing result 
print("The location of word is : " + str(res)) 
Output :



The original string is : geeksforgeeks is best for geeks
The location of word is : 3

 

Method #2 : Using re.sub() + index()
This performs this task in similar way as above method. In this also regex is employed. We use different regex function in this method.




# Python3 code to demonstrate working of 
# Word location in String
# Using re.sub() + index()
import re
  
# initializing string
test_str = 'geeksforgeeks is best for geeks'
  
# printing original string
print("The original string is : " + test_str)
  
# initializing word 
wrd = 'best'
  
# Word location in String
# Using re.sub() + index()
res = re.sub("[^\w]", " ",  test_str).split()
res = res.index(wrd) + 1
  
# printing result 
print("The location of word is : " + str(res)) 
Output :
The original string is : geeksforgeeks is best for geeks
The location of word is : 3



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