def find_delimiter(lst): """Find common delimiter for all strings in the list. Arguments: list -- list of strings to search for delimiters Returns: List of possible delimiters if there is one. Otherwise empty list. """ delimiters = [] for letter in lst[0]: is_possible_dilimiter = True for item in lst[1:]: if letter not in item: # If the letter doesn't apper in each item -- not a delimiter is_possible_dilimiter = False if is_possible_dilimiter and letter not in delimiters: # If the letter appears in every string and doesn't in the list yet delimiters.append(letter) return delimiters lst = ['john#doe', 'foo#bar', 'a#cat'] print(find_delimiter(lst))
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