Question

How to find the Nth occurrence of substring in a string with Python

Answer 1

s = 'php python php java php c++ php'

sub_str = "php"
occurrence = 3
  
pos = -1
for i in range(0, occurrence): 
    pos = s.find(sub_str, pos + 1) 
       
print(pos) 
 
 
'''
run:
  
20
         
'''

 

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Answer 2

s = 'php python php java php c++ php'
 
sub_str = "php"
occurrence = 3
   
lst = [i for i in range(0, len(s)) if s[i:].startswith(sub_str)] 

print(lst)
        
if len(lst) >= 4: 
    print(lst[occurrence -1]) 
else: 
    print ("No occurrence found")
         
  
  
'''
run:
   
[0, 11, 20, 28]
20
          
'''

 

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