Failure Cause：
对问题理解能力不足：对问题理解出错，导致问题拆解出错，错误代码中使用 .rstrip() 删除尾部空格，这会导致误判。

会话log：
------
## 最终结论
To solve the problem of determining if the last character of a given string is an alphabetical character and is not part of a word, we can break down the solution into several steps. Here's the complete solution:

```python
```

### Explanation:

1. **Removing Trailing Spaces**: We use `rstrip()` to remove any trailing spaces from the string, ensuring that we accurately identify the last meaningful character.

2. **Empty String Check**: After trimming, if the string becomes empty, we immediately return `False` because there are no characters to evaluate.

3. **Last Character Evaluation**: We retrieve the last character of the trimmed string and check if it is an alphabetical character using `isalpha()`. If it's not an alphabetical character, we return `False`.

4. **Standalone Letter Check**: To determine if this last alphabetical character is standalone (not part of a word), we check:
   - If it is the only character (`len(txt) == 1`), it must be standalone.
   - If it is preceded by a space (`txt[-2] == ' '`), it indicates that this letter is not part of a word.

By following these steps, we ensure that our function correctly identifies whether the last character of a string meets all specified conditions.


问题描述:

def check_if_last_char_is_a_letter(txt):
    '''
    Create a function that returns True if the last character
    of a given string is an alphabetical character and is not
    a part of a word, and False otherwise.
    Note: "word" is a group of characters separated by space.

    Examples:
    check_if_last_char_is_a_letter("apple pie") ➞ False
    check_if_last_char_is_a_letter("apple pi e") ➞ True
    check_if_last_char_is_a_letter("apple pi e ") ➞ False
    check_if_last_char_is_a_letter("") ➞ False 
    '''


测试用例:


import numpy as np

def is_floats(x) -> bool:
    # check if it is float; List[float]; Tuple[float]
    if isinstance(x, float):
        return True
    if isinstance(x, (list, tuple)):
        return all(isinstance(i, float) for i in x)
    if isinstance(x, np.ndarray):
        return x.dtype == np.float64 or x.dtype == np.float32
    return False


def assertion(out, exp, atol):
    exact_match = out == exp

    if atol == 0 and is_floats(exp):
        atol = 1e-6
    if not exact_match and atol != 0:
        assert np.allclose(out, exp, rtol=1e-07, atol=atol)
    else:
        assert exact_match


def check(candidate):
    inputs = [['apple'], ['apple pi e'], ['eeeee'], ['A'], ['Pumpkin pie '], ['Pumpkin pie 1'], [''], ['eeeee e '], ['apple pie'], ['apple pi e '], ['Pumpkin pi e'], ['Pumpkin pie!'], ['pUMPKIN PIE'], ['!'], ['aaaaa A'], ['aaaaa 1'], ['12'], ['apple pie!'], ['blueberry muffin!'], ['cake?'], ['pUMPKPIE'], ['aaaaaa 1'], ['cake?blueberry muffin!'], ['pUMPKPIEPumpkin pi e'], ['?blueberry muffin!'], ['Pumpkin pie!cake?'], ['Pumpkin e!'], ['applel pUMPKPIEPumpkin pi epie!'], ['caake?'], ['c?blueberry muffin!ke?'], ['aaaaa aaaaa 1A'], ['aaaaaa A'], ['aaaaaa aaaaa 1A'], ['cake?blueberrymuffin!'], ['cake?blueberrymuffinc!'], ['ceberrymuffinc!'], ['pUMPK'], ['aaaaa aaaaaa 1A'], ['1Pumpkin pie!cake?2'], ['ceberrymu12ffinc!'], ['?blueberruy muffin!'], ['ceberrymuffinc!Pumpkin pie!cake?'], ['acake?'], ['aaaaa aaa'], ['1Pumpkin pie!cake?applel pUMPKPIEPumpkin pi epie!2'], ['aaaaa 1cake?'], ['cakel?blueberrymuffinc!'], ['aaaaaa aaaa 1A'], ['cblueberry muffin!'], ['cake?blueberrymuffina!'], ['caaaaaaaa aaaaa 1Ake?'], ['cake?blueberrymufufinc!'], ['aaaaaaaaaa Aa aaa'], ['bluebepUMPKIN PIErry muffin!'], ['ceberrymunc!Pumpekin pie!ecake?'], ['ccake?'], ['blueberry muf'], ['cakel?blueberarymuffinc!'], ['bluebepUMEPKIN PIErry muffin!'], ['i?blueberry muffin!'], ['Pblueberry mufumpkin e!'], ['cakel?blupUMPKPIEPumpkin pi eeberrymuffinc!'], ['aaaaaa aaaaa 1?blueberruy muffin!A'], ['Pumpkin piie!cake?'], ['ccakapple pie!e?'], ['aaaaa pUMPKPIEPumpkin pi eaaaaa 1A'], ['blueberry ceberrymuffinc!Pumpkin pie!cake?muf'], ['Peumpkine pie!cake?'], ['pUMPcake?blueberrymufufinc!KPIEPulmpkin pi e'], ['1Pumpkin pie!c ake?applel pUMPaaaaa aaaaa 1AKPIEPumpkin pi epie!2'], ['applel pUMPKPIEPumpkin pi epiie!'], ['aaaaaa aaaaaa 1A'], ['cbluebeerry muffin!'], ['bluebepn!'], ['pUcake?blueberry muffin!IE'], ['jpBTU'], ['apple p!ie!'], ['OPxQV'], ['ccakceberrymuffinc!Pumpkin pie!cake?apple pcakel?blueberrymuffinc!iie!e?'], ['acceberrymuffinc!Pumpkin pie!cake?ake?'], ['pPUMPK'], ['blueberry mceberrymuffinc!Pumpkin pie!cake?in!'], ['aaaaaaaaaaaaaa 1cake?a pUcake?blueberry muffin!IEAa aaa'], ['21'], ['cakel?bluebec?blueberry muffin!ke?rarymuffinc!'], ['cake?blueberry mu ffin!'], ['aaaaapUMPK aaaaaa 1A'], ['aaaaacake?aa aaaaa 1A'], ['Pumie!cake?'], ['OPxQVV'], ['cmbluebeerry muffin!'], ['pUcake?blueberry muffnin!IE'], ['acake?blueberrymuffin!aaaa 1'], ['blueberry aaaaaa aaaaa 1An pie!cake?muf'], ['apple piaaaaaa aaaa 1Ae!'], ['cebOPxQVerrymuffinc!'], ['bluebepbUMEPKIN PIErccakceberrymuffinc!Pumpkin pie!cake?bapple pcakel?blueberrymuffinc!iie!e?muffin!'], ['bluebepUMEapple piaaaaaa aaaa 1Ae!muffinM!'], ['cebcbluebeerry muffin!errymuffcinc!'], ['aaa1Pumpkin pie!c ake?applel pUMPaaaaa aaaaa 1AKPIEPumpkin pi epie!2aaa A'], ['21Peumpkine pie!cake?'], ['cebcbluebeerry muffinPblueberry mufumpkin e!!errymuffcinc!'], ['cake?blueberrymufficebOPxQVerirymuffinc!n!'], ['cebcbluebeerry muffin!errymuffcinaaaaapUMPK aaaaaa 1Ac!'], ['pUMblueberry ceberrymuffinc!Pumpkin pie!cake?mufPKPIEPumpkin pi e'], ['applel pUMPKPIEPumpkin pi eppie!'], ['acake?bluebferrymuffin!aaaa 1'], ['cberry muffin!'], ['21Peumpki?'], ['aa1aaceberrymunc!Pumpekin pie!ecake?aa 1'], ['Apple $%^pie'], ['Hello, wor1d!'], ['The quick brown fox jumps over the lazy dogs.'], ['apple pie... or is it?'], ['My favorite food is fish, even though it swims.'], ['apple pi\ne'], ['the quick brown fox jumps over the lazy dogs'], ['apple pie! '], ['appple pie 1 '], ['A$pple $%^pie'], ['Apple $%^$p$%^pieie'], ['$%^$p$%^pieie'], ['food'], ['My favorite food is fish, even thougeh it swims.'], ['The quick browthe quick brown fox jumps over the lazy dogsn fox jumps over the lazy dogs.'], ['The'], ['Apple'], ['pi'], ['A$ppleapple pie!'], ['$%^$p$ieie'], ['aapple pie!pple pie!'], ['Hello, wor1d!!'], ['Apple $$%^pie'], ['A$ppl'], ['swims.'], ['p'], ['brown'], ['brwor1d!!own'], ['KeBambuP'], ['thApple $%^$p$%^pieieps over the lazy dogs'], ['over'], ['a'], ['apple piee! '], ['My favorite food is fish, even though it swims'], ['ffish,'], ['My favorite food is fish, even thougeh it s$%^piewims.'], ['dogs'], ['woquickr1d!'], ['A$ppleapple piapple pie! e!'], ['ap'], ['My favorite food is fish, even tho,ugh it swims'], ['foofd'], ['s$%^piewims.swims.'], ['$%^$p$%^pieeie'], ['A$ppleappl!e pie!'], ['thApple'], ['aapplfavoritee pie!pple pie!'], ['ApA$pplple'], ['apple pi\neapple piee! '], ['$%^$p$%^pieeie$%^$p$%^pieeie'], ['apple pie..A$ppleappl!e pie!. or is it?'], ['applpi\ne'], ['$%^$p$%^pieieps'], ['the quick brA$pplapple pie! eappl!es'], ['My favorite food is fish, even tho,ugh itjumps swims'], ['fooffd'], ['appl pie! '], ['fofooffdod'], ['Apple $%^$p$%^p'], ['My favoriitte food is fiwims.'], ['ovoer'], ['wor!!'], ['broA$ppleappl!e pie!wn'], ['ofoofd'], ['apppl pie! '], ['apple pie..A$ppleappl!e piei!. or is it?'], ['Apple $$%^ps$%^piewims.swims.ie'], ['Hello, wor1d!My favorite food is fish, even though it swims.'], ['apple pie..A$ppleappl!e pieipiapplet?'], ['ff'], ['appple pie 1brwor1d!!own'], ['apThe quick brown fox jumps over the lazy dogs.lpple pie 1 '], ['fox'], ['A$ippleapple pie!'], ['My favorite food is fisheven tho,ugh it swims'], ['or'], ['A$ppleapplee pie!'], ['apple pie..A$ppleappl!e piei!. or is it?fopie!wnofd'], ['pieipiapplet?'], ['1brwor1d!!own'], ['woquickr1d!ap'], ['wor1appl pie! d!Mry'], ['A$ppleappl!e pie!ApA$pplple'], ['pie!ApA$pplple'], ['A$pple'], ['foxx'], ['Hello, woor1d!'], ['ee'], ['fooapppl pie! d'], ['Hello,'], ['quick'], ['foA$ippleappleoapppl pie! d'], ['foA$ippleoapppl pie! id'], ['lazy'], ['Helleo,'], ['ApA$ppl$%^$p$%^pe'], ['foA$ippleoapppl'], ['My favorite fod is fisheven tho,ugoh it swimse'], ['apple '], ['jl'], ['My favorite food is fish, even though it swimis'], ['A$ppleappl!pie...e pie!ApA$pplple'], ['My favorite food is fish,My even tho,ugh it swims'], ['A$pp$le'], ['appiei!. or is itf?fopie!wnofd'], ['favorite'], ['jumps'], ['brA$pplapple'], ['Tehe'], ['!wor!!'], ['owoquickr1d!ap'], ['id'], ['wor1d!Mya'], ['fiwims.'], ['sdogs.'], ['bnnrown'], ['1brwor1wd!!own'], ['eHello, woor1d!'], ['MMy'], ['$$%^ps$%^piewims.swims.ie'], ['$%^e$p$%^p%ieeie$%^$p$%^pieeie'], ['bbroA$ppleappl!e'], ['$%^$p$%^pieeie$%^$p$%^pie'], ['My favorite food is fish, eveni tho,ugh it swims'], ['A$ppleappl!e fish,pie!ApA$pplple'], ['AA$ippleapple pie!'], ['appl apie! '], ['broA$ppleae pie!wn'], ['My favorite food is fish, even though it swimisHello, wor1d!!'], ['it'], ['My favorite food is fems.'], ['pie!.'], ['swims.apppl pie! '], ['t?'], ['brwor1d!1!own'], ['ppi'], ['1brwor1!d!!own'], ['Hello, 1woor1d!'], ['appe! '], ['fofx'], ['n'], ['HelA$ippleapplelo,'], ['applpi'], ['appl'], ['fooffoxxd'], ['pp'], ['eveni'], ['bnnrobwn'], ['$%^$p$%^pieiepsfood'], ['piei!.'], ['ApplAe $aapple pie!pple pie!$%^ps$%^piewims.swims.i'], ['thHello, 1woor1d!Apple $%^$p$%^pieieps over the lazy dogs'], ['A$ppleapple'], ['appfisl'], ['t??'], ['The quick browthe quick brown fox jumps over the lazy dogsn fox jumps over the lazy dohgs.'], ['pieipipie!wnapplet?woquickr1d!'], ['Appl$e $$%^ps$%^piewims.swims.ie'], ['A$ippleapple pi'], ['!!wor!!'], ['appl pie ! '], ['fooffoA$ip$pleoapppld'], ['A$ppKeBambuP'], ['A$$pple $%^pie'], ['KeBambuPA$ippleapple pi'], ['hWwY'], ['!w!r!!'], ['A$ppleappl!e fish,pie!Hello, wor1d!My favorite food is fish, even though it swims.A$pplple'], ['1woor1d!Apple'], ['oovoer'], ['the quick brA$pplapplappple pie 1brwor1d!!owne pie! eappl!es'], ['foA$ippl1eopapppl'], ['$%^pie'], ['Heo,'], ['A$ppKeBamb'], ['AApsp^My favorite food is fish, even tho,ugh itjumps swimspie'], ['dogsn'], ['Hello, wor1d!!i!.'], ['ppfish,pie!Hello,'], ['pie!pple'], ['ppfish,p,ie!Hello,'], ['d'], ['Hello, wor1,d!'], ['AA$ippleapple pThe quick browthe quick brown fox jumps over the lazy dogsn fox jumps over the lazy dohgs.ie!'], ['ffof'], ['evewor1appli'], ['A$$pple'], ['nTehe'], ['$%^^pie'], ['applpieappl!es'], ['My favorite food is fish, even though imt swims.'], ['thApple $%^$p$%^pieieps over the laozy dogs'], ['ffofwor!!'], ['KeBambuPA$ippleapple'], ['pieswimisHello,!pple'], ['Hel wor1d!!'], ['zLkykywysmc'], ['swims'], ['zLkykwysmc'], ['foooffd'], ['appe!'], ['$%^$p$%^pieei$eo,'], ['broA$ppleappl!!wn'], ['thee quick brA$pplapplaA$ippleappleppple pie 1brwor1d!!owne pie! eappl!es'], ['apie!'], ['woaapple!!i!.'], ['The quick browthe quick zbrown fox jumps orver the lazy dogsn fox jumps over the lazy dohgs.'], ['My favorite food, even thougeh it swims.'], ['A$ppleappl!e fish,pie!Hello, wor1d!My favorite food is fish, even though it swfoxims.A$pplple'], ['ppfish,piie!Hello,'], ['Apple $%The quick browthe quick brown fox jumps over the lazy dogsn fox jumps over the lazy dogs.^p'], ['A$$pe'], ['OqmEHnVTg'], ['pie!$%^ps$%^piewims.swims.i'], ['the quick brA$pplapplappple pie 1Applerwor1d!!owne pie! eappl!es'], ['A$$applpieappl!es'], ['AA$ippleapie!'], ['fooapppl'], ['Hello,1 wor1d!!i!.'], ['d!Mry'], ['brA$pp$lapple'], ['My favoriote food is fish,My even tho,ugh i t swims'], ['KeBambuPA$ippleapplei'], ['MM'], ['thApple $%^$p$%^pieieps over the lazyit?fopie!wnofd dogs'], ['t'], ['gxThe quick browthe quick zbrown fox jumps orver the lazy dogsn fox jumps over the lazy dohgs.'], ['aapplfavoritee pie!ppapple piee! le pie!'], ['A$ppleappl!e fish,pie!Hello, wor1d!My favorite fven though it swfoxims.A$pplple'], ['A$ppleappl!e fish,pie!Hello, wor1d!My favorite food is firsh, even though it swims.A$pplple'], ['My favorite food is fish, even thougeh it s$%^ewims.'], ['A$A$ppleapplepp$le'], ['thApple $%^$p$%^pieieps over the lapie!nofd dogs'], ['appli apie! '], ['brwor1d!woquickr1d!ap1!own'], ['Hel'], ['ffff'], ['pieipiappllet?'], ['HelloMy favorite food is fish, even thougeh it s$%^piewims.,'], ['Apple $%The qA$pp$leuick browthe quick brown fox jumps over the lazy dogsn fox jumps over the lazy dogs.^p'], ['upquicA$pple'], ['s$%^pieappiei!.wims.swims.'], ['szLkykywysmc'], ['thAppl'], ['sdogs.t??'], ['fven'], ['brA$pplapplaA$ippleappleppple'], ['oo'], ['quickbrwor1d!1!owfoA$ippleoapppl pie! idn'], ['$%^^pipe'], ['A$A$laozypp$le'], ['ii'], ['A$ppleapple piapple pie!e!'], ['aepplpieappl!es'], ['$%$^$p$%^pieie'], ['i'], ['apThe'], ['HelloMy favorite food is fish, even thougeh it s$%^piewims.,over'], ['A$ipHello, wor1d!My favorite food is fish, even though it swims.ple pi'], ['ofwor!!'], ['ppfish,p,ie!Hello,zLmc'], ['Appl$e $$%^ps$%^pi$%^$p$%^pieiepswims.ie'], ['A$ppleappl!e fish,pie!Hello, wori1d!My favorite food is fish, even though it swfoxims.A$pplple'], ['the quick brA$pplapplappplee pie 1Applerwor1d!!owne pie! eappl!es'], ['A$ppleappl!e fish,pie!Hello, wor1d!My favorite fven though it swfolxims.A$pplple'], ['My fa vorite food is fish, even tho,ugh itjumps swims'], ['appple'], ['Apple $%The quick browthe quick brown fox jumps over the lazy dogsn fox jumps over the lazy dfiwims.ogs.^p'], ['iE'], ['The quick brown foxk jumps over the lazy dogs.'], ['A$eplple'], ['doogsn'], ['applMy favorite food is fish, even thougeh it s$%^ewim s.'], ['$aapple'], ['broA$ppleappl!e'], ['$%%^e$p$%^p%ieeie$%^$p$%^pieeie'], ['My favoriote food is fish,Mtho,ugh i t swims'], ['A$ppApple $%^pie pie!ApA$pplple'], ['apppe!'], ['My favoriote fMood is fish,Mtho,ugh i t swims'], ['orver'], ['is'], ['pie..A$ppleappl!e'], ['My favorite food is fish, eveni tho,ugh it swwor1d!Myhifms'], ['My favorite food is fish, even aapplfavoritee pie!pple pie!though imt swims.'], ['Apple $%The quick browthe quick brown fox jumps over the lazy dogsn fox jumps over the lazy dfiwims.oppfish,p,ie!Hello,zLmcgs.^p'], ['HelloMy favorite food is fish, even thougeh it s$%^piewims.,overi'], ['Apple $%The qA$pp$leuick browthe quick brown fox jumps over the lazy dogsn fox jumps over the lazy dogs.Apple $%^pie^p'], ['brpiei!.'], ['foxk'], ['lA$ppleapple piapple pie!e!'], ['apThe quick brown fox jumps over the fooapppllazy dogs.lpple pie 1 '], ['Hllo,1'], ['fems.'], ['pie!'], ['zbrown'], ['My favorite ftood is fish, even though imt swims.'], ['apppapple pie!e!'], ['appee!  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brown fox jumps oapple piie!gs.ps'], ['pitie!^quickoHello, wor1d!verfish,jThepiepi'], ['$%apppleThe quickthough brown fox jumps over apple pie!zy app1lgs.'], ['aThe'], ['apple pie...p s it?'], ['jThe quick brown fox jumps over zy app1le pitie!dogs.umThe quickapple pitie! brown fox jumpsp oapple piie!gs.ps'], ['favoripitie!dogs!.te'], ['aT'], ['jumspappfavoritejquickappleHHello,s'], ['bappthe quick brown foox jumpls over the lazy dogs '], ['applefavoritte'], ['jThe quick brown fox jumps ovepitie!^fish,jThepiepiapplxr zy app1le pitiegs.umThe quickapple pitie! brown fox jumps oapple piie!gs.ps'], ['pifoeleox'], ['apeepleApple $%appple ppquickthoughiltie!^piejump pie.. or is it?'], ['vXshDwOJiX'], ['jThe quick brown fox jumps over zy app1le pitie!dogs.umThmpsp oape!gs.ps'], ['favoritee'], ['ox$%^piwor1d!e'], ['$%^pi$e'], ['pitie!dogTs.'], ['HHelljumplso, d!'], ['pie...p'], ['pitie!^pieefavoritequickapple'], ['The quick brown fox juppiltie!^piejumpmp app1le pitie!dogso.'], ['pitie!^fish,Hello, d!jThepiepi'], ['$%apppleThe quick brown f$%apppleTheox jumps over apple pie!zy app1le pitie!dogs.'], ['aThe quick brown fox juppiltie!^piejumpmp app1ele pitie!dogso.pplx\ne'], ['The qupdogs!.'], ['pitie!^pieefavoritapple'], ['foxver'], ['Apple $l%^pipe'], ['appplapitie!^fish,jThepiepippple'], ['ppiltie!^piejump'], ['pitie!dogHHello,d dMy favori$%apppletse food is fish,jThe even though it swims.!s.'], ['appe'], ['pitipitie!dogs.umThmpsp'], ['appee pitie!'], ['The quickapple pitie! birown fox jumps oapple piie!gs.brown'], ['pitie!dogso.'], ['My favori$%apppletse food is fish,jThe evenApple $%appple ppapplApple $%appple ppitie!^pieefavoritequickapple pifoox\neitie!^pe though it swims.'], ['The quickapple pitie! birown fThe quickapple pitie! bTrown fox jumps oapple piie!gs.ox jumps oapple piie!gs.brown'], ['HHello,applAp^pipeefavoritequickapple pifoox\ne d!'], ['TThe'], ['feover'], ['ps'], ['ipitie!'], ['ppitie!^pieefavoritequickapple'], ['favoripitie!dogsbrown!.te'], ['The quick brown fox evenApplejumps over zy app1le pitie!dogTs.'], ['ppiptie!^pie'], ['pietie!dogso.'], ['qkuickkypifoox'], ['favoripritie!dogsbrown!.te'], ['My favori$%apppletse food is fish,jThe evenApple $%appple ppapplApple $%appple ppitie!^pieefavoritequickapple pifoox\neitie!^pe thoufavoripitie!dogsbrown!.tegh it swims.'], ['appfavoritequickapple'], ['iee'], ['My favori$%apppletse food is fish,jThe evepapplApple $%appple ppitie!^pieefavoritequickapple pifoox\neitie!^pe though it swims.'], ['The quick brown fox jHHello,d d!apple pie!zy app1le pitie!dogs.'], ['Meleyy'], ['qkuickoHello, wor1d!ver'], ['hh'], ['MeapeepleAppleleyy'], ['d!pifoox'], ['qupick'], ['The quck brown fox jump app1lfye piptie!dogs.'], ['pitie!!dogs!.'], ['thhough'], ['eee'], ['piiee!'], ['d!!'], ['$%apppleThe quick brown fox jumps over apple pqupickapp1lgs.'], ['pitie!s'], ['nGwwMappple pie! UkIwSw'], ['The qthe quick brown fox jumps over the lazy dogsuick brown fox jumps over apple pie!zy app1le pitie!dogs.'], ['appplapp ple piep! e 1 '], ['piep!'], ['faveoritee'], ['pitie!dogso.pplx'], ['qupApple $%appple ppapplApple $%appple ppitie!^pieefavoritequickapple pifoox\neitie!^peick'], ['pitdogsuickie!dogTs.'], ['quickthough'], ['pitile!^quickoHello, wor1d!verfish,jThepiepi'], ['d!jThepiepi'], ['eitie!^peick'], ['pitie!^pieefav$%^piwor1d!eoritapple'], ['foood'], ['pitie!dogHHello,d'], ['appapplApple $%appple pitie!^pieefavoritequicMyykapple pifoox\nele pitie!'], ['My favorite food is fish,jThe evHHello,applAp^pipeefavoritequickappleen though it swims.'], ['pietie!dogjumpso.'], ['pitiepitie!^fish,Hello,!dogs.umpsor'], ['The app1leqjuck brown fox jump app1lfye piptie!dogs.'], ['eThe qupappe pitie!ick bropwn fox jump app1le pitie!dogs.pitie!dogs!.'], ['The quickapple pitie!qupick brown fox jumps oapple piie!gs.'], ['Apple $%e^piswims.!s.e'], ['qkuickoHello,'], ['piapp1leqjucktise!ogs.umps'], ['applAp^pipeefavoritequickaplple pifoox\ne'], ['quickapple'], ['appappapplApplepplAppl$%^piwor1d!ee $%appple pitie!^pieefavoritequickapple pifoox\nele pitie!'], ['piapp1leqjucktise!dogsuickofavoritegs.umps'], ['ovepitie!^fish,jThepiepiapplxr'], ['11'], ['bTrown'], ['appapplApple $%appple pitie!^pieefavoritequickapple pifoox\nele pitie!piiee!'], ['foxMypiptie!dogs.'], ['ppitifavoriteee!^pie'], ['pitie!ogs.dogs.ps'], ['qkuickkypiappapplApple $%appple pitie!^pieefavoritequickapple pifoox\nele pitie!piiee!foox'], ['HHello,applAp^pipeefavoritapplAp^pipeefavoritequickaplpleequickapple pifoox\ne d!'], ['qpitdogsuickie!dogTs.uck'], ['appplapp'], ['applAp^pipeefavoritequickaplaple pifoox\ne'], ['$%apppleThe quick brown fox jumps over af$%apppleTheoxpple pie!zy app1lgs.'], ['The qupickapple pitie!qupick brown fox jumps oapple piie!gs'], ['fd'], ['evHHello,applAp^pipeefavoritequickappleen'], ['pitie!doigTs.'], ['pitie!^pieefavoriteqckapple'], ['appappapplApplepplAppl$%^piwor1d!eepie'], ['My fadogs.vorite food is fish, even though it swims.'], ['jjThe quick brown fox jumps ovepitie!^fish,jThepiepiapplxr zy app1le pitie!dogs.umThe quickapple pitie! brown fox jumps oapple piie!gs.psumpus'], ['pifoThe quick brown fox evenApplejumps over zy app1le pitie!dogTs.ox'], ['appplejump pie... or is it?'], ['Hellod, d!'], ['appappapplApplepplAppl$%^piwor1d!ee'], ['jumppitie!^pies'], ['Apple pie'], ['pitie!dog.pplx'], ['ppitie!^pieeHello, wor1djump !favoritequickapple'], ['apd!applepe pitie!'], ['The quick brown fox jump app1 le pitie!dogso.'], ['even!wd!'], ['YIjGPAGiyb'], ['appllAp^pipeefavoritequickapple pifoox\ne'], ['Hello, wor1djuomp !'], ['aaT'], ['rbro'], ['My favori$%apppletse food isle ppitie!^pieefavoritequickapple pifoox\neitie!^pe though it swims.'], ['jjThe quick brown fox jumps ovepitie!^fish,jThepiepiiapplxr zy app1le pitie!dogs.umThe quickapple pitie! brown fox jumps oapple piie!gs.psumpus'], ['awor1djuomp! '], ['the quick brownpie.. foox jumps over the lazy dogspitie!dogs.'], ['applApple $%appple pitie!dogs.ppitie!^pieefavoritequickapple pifoox\ne'], ['$%apppleThe quick brown fox jumps over appple pie!zy app1lgs.'], ['pitiee!^pieefavoritapple'], ['piie!gs'], ['Apppiltie!^piejumpe pitie!^pie'], ['aaTeThe qupappe pitie!ick bropwn fox jump! app1le ppitie!sitie!dogs.pitie!dogs!.'], ['swims.!s.'], ['appplappple pie! e HHello,applAp^pipeefavoritapplAp^pipeefavoritequickaplpleequickapple pifoox\ne d!1 '], ['apple pie... or .is it?'], ['appplepitie!qupick pie! '], ['The quick brown fox jHHelo,d d!apple pie!zy app1le pitie!dogs.'], ['jumspappfavoritejquickapplpitie!dogs.pitie!dogs!.eHHello,s'], ['1le'], ['pie.pitie!s..'], ['applAp^pipeefavoox\ne'], ['pitie!dogs.pitie!dogs!.'], ['d!d1'], ['eApple $%^pie'], ['ppapplApple'], ['eitie!^p^eick'], ['ewd!favoriteqfavoripritie!dogsbrown!.teuickapple!'], ['aqkuickyThe'], ['TMy fadogs.vorite food is fish, even though it swims.'], ['MyjThe'], ['jThe quick brown fox jump,jThepiepiapplxr zy app1le pitiegs.umThe quickapple pitie! brown fox jumps oapple piie!gs.ps'], ['ppquickthoughiltie!^piejump'], ['doguick'], ['pitie!dogs.umThmpsp'], ['pitie!dogs.ppitie!^pieefavoritequickapple'], ['lapplx\ne'], ['favoriprqkuickkypiappapplApple $%appple pitie!^pieefavoritequickapple pifoox\nele pitie!piiee!fooxitie!dogsbrown!.te'], ['Applie pie'], ['The quickpiifoox$%^piwor1d!e brown fox jHHelo,d d!apple pie!zy app1le pitie!dogs.'], ['$%apppleThTThee quick brown fox jumps over af$%apppleTheoxpple pie!zy iapp1lgs.'], ['RcRJCoSsej'], ['appplappple pie! e HHello,applAp^pbTrownipeefavoritapplAp^pipeefavoritequickaplpleequickapple pifoox\ne d!1 '], ['pietijjThe quick brown fox jumps ovepitie!^fish,jThepiepiapplxr zy app1le pitie!dogs.umThe quickapple pitie! brown fox jumps oapple piie!gs.psumpuse!dogso.'], ['qupickapple'], ['Applet  $%appdgsppitie!dogs.pitie!ddogs!.le ppitie!^pie'], ['favoripitie!dpie...pogs!.te'], ['pitie!dogs.ppkitie!^pieefavoritequic$%apppleThe quick brown f$%apppleTheox jumps over apple pie!zy app1le pitie!dogs.ple'], ['ox$%^piwor1d!eapplx\ne'], ['jThe quick brown fox jumps ovepitie!^fish,jThepiepiapplxr zy app1le pitiegs.umThe quickapple pitie! brown fox jumps oapple piie!s'], ['ppip^tie!^pie'], ['the quick brownpie.. foox jumps over the lazy dogspitie!dogs.piie!gs.brown'], ['$%apppleTheck brown fox jumps over apple pie!zy app1le pitie!dogs.'], ['rbo'], ['pitile!^quTMyickoHello, wor1d!verfish,jThepiepi'], ['$%apppleThecak'], ['pit$^%^piwor1d!eie!^piieefavoritapple'], ['the quick brownpie.. qupApple $%appple ppapplApple $%appple ppitie!^pieefavoritequickapple pifoox\neitie!^peickfoox jumps over the lazy dogspitie!dogs.'], ['Apple $%appple ppii$%ae!^pie'], ['pitie!dogs.fppitie!^pieefavoritequickapple'], ['Apple pieappplepitie!qupiick pie! '], ['pitie!^piepefavoritapple'], ['MeapeepleAppleleyey'], ['brownpie..'], ['apeepleApple $%appple ppquiappple pie!  it?'], ['hquickthough'], ['dapplApple $%appple pitie!dogs.ppitie!^pieefavoritequickapple pifoox\neick'], ['appplejump'], ['REVTbqcIZ'], ['ipit!ie!'], ['jTh e quick brown fox jumps ovepitie!^fish,jThepiepir zy app1le pitie!dogs.umThe quickapple pitie! brown fox jumps oapple piie!gs.ps'], ['the'], ['aThe quick brown fox juppiltie!^piejumpmp app1equswims.!ickkle pitie!dogso.pplx\ne'], ['pitie!dogHHello,d dMy favori$%apppletse f$%apppleThTTheeood is fish,jThe even though it swims.!s.'], ['apple pie... pitie!dogTs.oxr .is it?'], ['qupicekapple'], ['pitie!^pieefav$%^poiwor1d!ieoritapple'], ['eThe qupappe pitie!ick bropwn fox jump app1le pitie!dogs.pitieppiltie!^pie!dogs!.'], ['piitie!dogs.ple'], ['ox$MeapeepleAppleleyy%dgse^piwor1d!e'], ['piieewor1d!!'], ['appljThe quick brown fox jumps ovepitie!^fish,jThepiepiapplxr zy app1le pitiegs.umThe quickapple pitie! brown fox jumps oapple piie!s pitie!'], ['ApEuple $%a ppple ppiltie!^pie'], ['swims.!.'], ['pitie!dogHHello,d dMy favori$%apppletse food i$%apppleThecaks fish,jThe even though it swims.!s.'], ['Hello,  d!'], ['pitie!dogs.ppitie!^pieeifavoritequickapple'], ['The quick brown fox jumps over apppp1le pitie!dogs.'], ['qucqqk'], ['pitie!^pieefavoritequicMyykapple'], ['Apple $%e^pieThe quick brown fox jumps over zy app1le pis.'], ['applApple $le pitiepppie...ple pifoox\ne'], ['appppple1le pitie!'], ['pitie!dogs.pepitie!^pieefavoritequickapple'], ['hhox$%^piwor1d!eapplx'], ['le'], ['Hello, wor1!djuomp !'], ['pitiegs.umThe'], ['appleApplepie... $%appple ppiltie!^piejump pie.. or is it?'], ['Apple $%appple ppipitie!^pie'], ['jusmps'], ['ppitie!sitie!dogs.pitie!dogs!.']]
    results = [False, True, False, True, False, False, False, False, False, False, True, False, False, False, True, False, False, False, False, False, False, False, False, True, False, False, False, False, False, False, False, True, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, True, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, True, False, False, False, False, True, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, True, False, False, False, False, False, True, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, True, False, False, True, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, True, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, True, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, True, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, True, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, True, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, True, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, True, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False]
    for i, (inp, exp) in enumerate(zip(inputs, results)):
        assertion(candidate(*inp), exp, 0)


生成的代码:
def check_if_last_char_is_a_letter(txt):
    if not txt:
        return False
    txt = txt.strip()
    if txt and txt[-1].isalpha():
        words = txt.split()
        if len(words) > 0 and len(words[-1]) == 1:
            return True
    return False

错误信息:
NoneType: None
