Итак, вот код, который я написал, чтобы найти палиндромы в слове (чтобы проверить, есть ли палиндромы в слове, включая само слово) Условие: пробелы между знаками учитываются и не игнорируются. Пример: А, но туба - палиндром, но технически в пространствах, участвующих в настоящее время это нет. чтобы'С критериями.

Исходя из вышеизложенного, следующий код обычно должен работать. Вы можете попробовать самостоятельно с различными тестами, чтобы проверить, если этот код дает какую-либо ошибку.

def pal(text):
    """

    param text: given string or test
    return: returns index of longest palindrome and a list of detected palindromes stored in temp
    """
    lst = {}
    index = (0, 0)
    length = len(text)
    if length  0:
                dec -= 1
            if inc < text.index(text[-1]):
                inc += 1
    if len(lst) != 0:
        val = lst.keys()
        longest = max(val, key = len)
        return lst[longest], longest, val
    else:
        return index

findlet () fun:

def findlet(alpha, string):
    f = [i for i,j in enumerate(string) if j == alpha]
    return f

Иногда это работает:

pal('madem')
dec -1, inc 1,
text[dec:inc+1] 
 s m 
dec 1, inc 3,
text[dec:inc+1] ade
 break 1st elif
 s m 
dec 2, inc 4,
text[dec:inc+1] dem
 break 1st elif
 s m 
dec 3, inc 5,
text[dec:inc+1] em
 break 1st elif
 s m 
Out[6]: ((0, 1), 'm', ['m'])

pal('Avid diva.')
dec -1, inc 1,
text[dec:inc+1] 
 break 2nd if
 s avid div 
dec 1, inc 3,
text[dec:inc+1] vid
 break else
 s avid  
dec 2, inc 4,
text[dec:inc+1] id 
 break else
 s vid d 
dec 3, inc 5,
text[dec:inc+1] d d
 s d d 
dec 2, inc 6,
text[dec:inc+1] id di
 s id di 
dec 1, inc 7,
text[dec:inc+1] vid div
 s vid div 
dec 4, inc 6,
text[dec:inc+1]  di
 break 1st elif
 s id di 
dec 1, inc 7,
text[dec:inc+1] vid div
 s vid div 
dec 5, inc 7,
text[dec:inc+1] div
 break 1st elif
 s vid div 
dec 6, inc 8,
text[dec:inc+1] iva
 break 1st elif
 s avid diva 
dec 8, inc 10,
text[dec:inc+1] a.
 break else
 s va. 
dec 6, inc 10,
text[dec:inc+1] iva.
 break else
 s diva. 
dec 4, inc 10,
text[dec:inc+1]  diva.
 break else
 s d diva. 
dec 2, inc 10,
text[dec:inc+1] id diva.
 break else
 s vid diva. 
Out[9]: ((0, 9), 'avid diva', ['avid diva', 'd d', 'id di', 'vid div'])

И на основании критериев / условий я поставил:

pal('A car, a man, a maraca.')
dec -1, inc 1,
text[dec:inc+1] 
 break else
 s  
dec -1, inc 3,
text[dec:inc+1] 
 s a ca 
dec 1, inc 3,
text[dec:inc+1]  ca
 break if
 s a ca 
dec 2, inc 4,
text[dec:inc+1] car
 break else
 s  car, 
dec 3, inc 5,
text[dec:inc+1] ar,
 break else
 s car,  
dec 1, inc 7,
text[dec:inc+1]  car, a
 break 1st elif
 s a car, a 
dec 4, inc 6,
text[dec:inc+1] r, 
 break 1st elif
 s  car,  
dec 5, inc 7,
text[dec:inc+1] , a
 break 1st elif
 s ar, a 
dec 2, inc 8,
text[dec:inc+1] car, a 
 break 1st elif
 s  car, a  
dec 6, inc 8,
text[dec:inc+1]  a 
 s  a  
dec 5, inc 9,
text[dec:inc+1] , a m
 break else
 s r, a ma 
dec 3, inc 11,
text[dec:inc+1] ar, a man
 break else
 s car, a man, 
dec 1, inc 13,
text[dec:inc+1]  car, a man, 
 s  car, a man,  
dec 7, inc 9,
text[dec:inc+1] a m
 break else
 s  a ma 
dec 5, inc 11,
text[dec:inc+1] , a man
 break else
 s r, a man, 
dec 3, inc 13,
text[dec:inc+1] ar, a man, 
 break if
 s   
dec 8, inc 10,
text[dec:inc+1]  ma
 break if
 s  
dec 6, inc 4,
text[dec:inc+1] 
 break 1st elif
 s r 
dec 3, inc 5,
text[dec:inc+1] ar,
 break else
 s car,  
dec 1, inc 7,
text[dec:inc+1]  car, a
 break 1st elif
 s a car, a 
dec 9, inc 11,
text[dec:inc+1] man
 break else
 s  man, 
dec 7, inc 13,
text[dec:inc+1] a man, 
 break if
 s  
dec 5, inc 2,
text[dec:inc+1] 
 break 1st elif
 s c 
dec 1, inc 3,
text[dec:inc+1]  ca
 break if
 s a ca 
dec 10, inc 12,
text[dec:inc+1] an,
 break 1st elif
 s , a man, 
dec 4, inc 13,
text[dec:inc+1] r, a man, 
 break 1st elif
 s  car, a man,  
dec 11, inc 13,
text[dec:inc+1] n, 
 break 1st elif
 s  man,  
dec 7, inc 14,
text[dec:inc+1] a man, a
 s a man, a 
dec 6, inc 15,
text[dec:inc+1]  a man, a 
 s  a man, a  
dec 5, inc 16,
text[dec:inc+1] , a man, a m
 break else
 s r, a man, a ma 
dec 3, inc 18,
text[dec:inc+1] ar, a man, a mar
 break else
 s car, a man, a mara 
dec 1, inc 20,
text[dec:inc+1]  car, a man, a marac
 break else
 s a car, a man, a maraca 
dec 12, inc 14,
text[dec:inc+1] , a
 break 1st elif
 s an, a 
dec 9, inc 15,
text[dec:inc+1] man, a 
 break if
 s  
dec 7, inc 2,
text[dec:inc+1] 
 break 1st elif
 s c 
dec 1, inc 3,
text[dec:inc+1]  ca
 break if
 s a ca 
dec 13, inc 15,
text[dec:inc+1]  a 
 s  a  
dec 12, inc 16,
text[dec:inc+1] , a m
 break 1st elif
 s man, a m 
dec 8, inc 17,
text[dec:inc+1]  man, a ma
 break 1st elif
 s a man, a ma 
dec 6, inc 18,
text[dec:inc+1]  a man, a mar
 break 1st elif
 s r, a man, a mar 
dec 3, inc 19,
text[dec:inc+1] ar, a man, a mara
 s ar, a man, a mara 
dec 2, inc 20,
text[dec:inc+1] car, a man, a marac
 s car, a man, a marac 
dec 1, inc 21,
text[dec:inc+1]  car, a man, a maraca
 break 1st elif
 s a car, a man, a maraca 
dec 14, inc 16,
text[dec:inc+1] a m
 break 1st elif
 s man, a m 
dec 8, inc 17,
text[dec:inc+1]  man, a ma
 break 1st elif
 s a man, a ma 
dec 6, inc 18,
text[dec:inc+1]  a man, a mar
 break 1st elif
 s r, a man, a mar 
dec 3, inc 19,
text[dec:inc+1] ar, a man, a mara
 s ar, a man, a mara 
dec 2, inc 20,
text[dec:inc+1] car, a man, a marac
 s car, a man, a marac 
dec 1, inc 21,
text[dec:inc+1]  car, a man, a maraca
 break 1st elif
 s a car, a man, a maraca 
dec 15, inc 17,
text[dec:inc+1]  ma
 break 1st elif
 s a ma 
dec 13, inc 18,
text[dec:inc+1]  a mar
 break 1st elif
 s r, a man, a mar 
dec 3, inc 19,
text[dec:inc+1] ar, a man, a mara
 s ar, a man, a mara 
dec 2, inc 20,
text[dec:inc+1] car, a man, a marac
 s car, a man, a marac 
dec 1, inc 21,
text[dec:inc+1]  car, a man, a maraca
 break 1st elif
 s a car, a man, a maraca 
dec 16, inc 18,
text[dec:inc+1] mar
 break 1st elif
 s r, a man, a mar 
dec 3, inc 19,
text[dec:inc+1] ar, a man, a mara
 s ar, a man, a mara 
dec 2, inc 20,
text[dec:inc+1] car, a man, a marac
 s car, a man, a marac 
dec 1, inc 21,
text[dec:inc+1]  car, a man, a maraca
 break 1st elif
 s a car, a man, a maraca 
dec 17, inc 19,
text[dec:inc+1] ara
 s ara 
dec 16, inc 20,
text[dec:inc+1] marac
 break 1st elif
 s car, a man, a marac 
dec 1, inc 21,
text[dec:inc+1]  car, a man, a maraca
 break 1st elif
 s a car, a man, a maraca 
dec 18, inc 20,
text[dec:inc+1] rac
 break 1st elif
 s car, a man, a marac 
dec 1, inc 21,
text[dec:inc+1]  car, a man, a maraca
 break 1st elif
 s a car, a man, a maraca 
dec 19, inc 21,
text[dec:inc+1] aca
 s aca 
dec 21, inc 23,
text[dec:inc+1] a.
 break else
 s ca. 
dec 19, inc 23,
text[dec:inc+1] aca.
 break else
 s raca. 
dec 17, inc 23,
text[dec:inc+1] araca.
 break else
 s maraca. 
dec 15, inc 23,
text[dec:inc+1]  maraca.
 break else
 s a maraca. 
dec 13, inc 23,
text[dec:inc+1]  a maraca.
 break else
 s , a maraca. 
dec 11, inc 23,
text[dec:inc+1] n, a maraca.
 break else
 s an, a maraca. 
dec 9, inc 23,
text[dec:inc+1] man, a maraca.
 break else
 s  man, a maraca. 
dec 7, inc 23,
text[dec:inc+1] a man, a maraca.
 break else
 s  a man, a maraca. 
dec 5, inc 23,
text[dec:inc+1] , a man, a maraca.
 break else
 s r, a man, a maraca. 
dec 3, inc 23,
text[dec:inc+1] ar, a man, a maraca.
 break else
 s car, a man, a maraca. 
dec 1, inc 23,
text[dec:inc+1]  car, a man, a maraca.
 break else
 s a car, a man, a maraca. 
Out[8]: ((13, 16), ' a ', ['', ' a ', 'c', ' ', 'aca', 'ara', 'r'])

Иногда это нене работает вообще:

    pal('madam')
    dec -1, inc 1,
    text[dec:inc+1] 
     s m 
    dec 1, inc 3,
    text[dec:inc+1] ada
     break 1st elif
     s m 
    dec 2, inc 4,
    text[dec:inc+1] dam
     break 1st elif
     s m 
    dec 3, inc 5,
    text[dec:inc+1] am
     break 1st elif
     s m 
    Out[5]: ((0, 1), 'm', ['m'])

Теперь, учитывая, что мадам - это очень хороший палиндром, он должен работать, и есть много случаев, которых у меня нет.Я проверил себя, чтобы выяснить, какие другие законные палиндромы это не делаетт обнаружить.

Q1: почему это иногда не обнаруживает?

Q2: Я хотел бы оптимизировать свой второй код в этом отношении. Любые входы?

Вопрос 3. Какой лучший подход существует для гораздо более эффективного кода, чем мой код First, который повторяется много раз?