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  1. Prepare
  2. Python
  3. Regex and Parsing
  4. Re.start() & Re.end()
  5. Discussions

Re.start() & Re.end()

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recency

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338 Discussions

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  • loucifsk
     + 0 comments

    Different approach : 

    import re, sys

S = input()
k = input()

def occurences_indexer(text, target):
    occurences_indexs = []
    initial_text_len = len(text)

    while True:
        occurence = re.search(f'{target}', text)  

        if occurence != None:
            delta_target_len = (initial_text_len-len(text))
            occurences_indexs.append((occurence.start()+delta_target_len, occurence.end()+delta_target_len-1))

            if re.search(f'{target[0]}', target[1:]) != None: #Searchs for occurence stacking
                text = re.sub(f'{target}', f'{target[1:]}', text, count=1)
                
            else:
                text = re.sub(f'{target}', '', text, count=1)

            continue
        
        else:
            break

        first_search = False
    
    if occurences_indexs == []:
        occurences_indexs.append((-1, -1))
    
    return occurences_indexs
    
for index_tuple in occurences_indexer(S, k):
    print(index_tuple)

  • ericstricker73
     + 0 comments
    import re

full_string = input().strip()
search_string = input().strip()
l = []
i = 0
while i <= len(full_string):
    string = re.search(search_string , full_string[i:] )
    if(string):
        l.append(tuple([string.start() + i, string.end() - 1 + i]))
        i += int(string.span()[0]) + 1
    else:
        break;
[print(x) for x in l] if len(l)!=0 else print("(-1, -1)")

  • muhammadkorkor94
     + 0 comments

    import re

    s = input() k = input() pattern = rf"(?=({re.escape(k)}))" if matches := list(re.finditer(pattern, s)):

    for match in matches:
    print((match.start(1),int(match.end(1) - 1)))

    else: print((-1, -1))

  • imam_alfaridzi
     + 0 comments

    Here's my code:

    from re import finditer
s, k = input().strip(), input().strip()
print(*[(m.start(1), m.end(1) - 1) for m in finditer(f'(?=({k}))', s)] or [(-1, -1)], sep='\n')

  • saifmhwh
     + 0 comments

    without using regex

    string_S = input()
string_k = input()

len_S = len(string_S)
len_k = len(string_k)

listed_script = []

for idS in range(len_S):
    if(idS+(len_k-1)<len_S):
        if ''.join([string_S[idS+idk] for idk in range(len_k)]) == string_k:
            listed_script.append((idS,idS+(len_k-1)))

if(len(listed_script)==0):
    listed_script.append((-1,-1))

for lsc in listed_script:
    print(lsc)