[已解决]string index out of range

lilu871006

def function1():
    str1 = '''ACFlCTLIQlAIVMTqHFkswqbDDHtpgcWaXSSglUYKE
lqNsYCyaQXBzrFUbkAUAWAKrDgDtAlGMBqWQhpEwquZqWZJpslUfMllCwWptqINjrOBTLuPzwvXNbLCx
oFRritKRpJgBOaGPZdkUzvYnvYmAlEsVmKRXqyQUOdCBqLYyboOYeAQNLnkuiDXCiNiksSSRpDMVQQgs
TmYThnppfKSmkpjjceGLaMOvYgsvNkGENKgGtUSzVPlLMeephDKrWGNpAxBqRiCnQIuKwDZurIRsznUp
xhstMWpHdZzqeEnttlAHiWbhbIJpwKBAGsFWthBiwBDKTFzIUamELZJFLbmqOmwBIYBJIofAUyxTLUEm
LcOXzjIHFcfUfEWccbWzhVuIZMdTVsOaNsLTpHjrvFaYTnJUrqaYnUmbobfOXXtkjKjFUEhVNlPWeaIY
uABNuEDKFWiUaqQiBHGsgEmDSKiJKLkkzFWlobXIyUlDzGcwDnEOwwWxgFpebsslmKItazIYctPROSJp
ImDHusQIkoFQSmuqwdcPNERvflfHtkGTrtbQXqZUsazoxmbVTPIuuxKvfALAaGnIuIZwczCcoIRMncBs
timFGHPJPaHMPTLjsBjIwbbzKyghaDTUStzJceaYAneywwpvdiUJifPHtXmAwZPChWsDmwonzeeQCEiB
xWsJLAtrdVEOBxEaYiSabHdUwlXlDOAKzZUwozJoBGvnFttDkXdYdjQSzzhTIPfYpWVFdiFIqSbyPZIi
VoXunBPbAJVMWluPcIfHmjPeHaTyClCvTOucEYEZXbVDiZMsfeuruDGMmQEsHutzvzVmWvCoPRguBiHh
taTeaguPmNuAxzYJLEcdoApfIFBaLUqettjTJNlHZYlJZRRoKXEvFnoUHdPjDuXuTAubGODkHAokpItw
SlEwhjrUSlfMawWlTMciWAzVcgPcqCHIaogokYAWGsvWZzBfJqzxIkCNvHDvBkOMCyeYXzVVuRJLQIOy
BMoVPgFLOagDxyPfWxTtZQNCLOrVVclPzMNYruNUyMOBKxBvinxuGMAAfndhPsROtkOJAAJQSxpmTzXm
CmEwZOhlItvETUneqvdKLghLyREjuJWRFjVVuNMiPuvvmRaEUmjCXDVuMRAvBuHUYGKPXthWISIbueRp
uvxpmqclmrXpAGFrxhJGxQwlrbkHEmcEUooCoPqGzbrCfIWmtUKmzzXvcqbhxKcAwXCNjbJDWDndKiLK
HwaFKyhXJQgHjIaTfIJrkhUpTHJZebRertDigQtDKxGerMRgHWFTrqqZlcBjAUfTZdFlZCAEZnhzgTIy
gJSsWJjFcCVoFonAfKPTOhTxjxTRtzSKLoIOScEwBCDvWFDVGpBOpijqdwvugoYsyuIOZJTcySDrzy
wBxediHOIYgasrUIDsNZcParqTGfTaBZHoSssXGtiCVvLReyoiitzMpsouqUeMHGWwDMgBaQTRkxPwNP
XsvyFVXfjgKuamMTsEsbeKDgAdVndyDleenPBcXWKGPcDsALDajkCEGufvbtyXUZnelqISbQnHphDoTH
RMIxMKclpWSvQHkzRhdAehBVaKYaXRPMpGaeRxvTRVFfewirvIDoGvYTAvKSoMFCLUNVFVKrYMeYtBrS
KgiBOjvliNOHLrmztypGhQjtpEQwzVfpVqsTUPvOCPzgqOuvLXJBQZHLmSwGTxEMgCAbogXombCiBDNX
BvGtXjrGWbWHtNCoRuqIZPhBQXZiNUhbmzOiyByAoMSBvusppiPVibIqmLXwXEVfcEAyNeUxaEZThULu
mkGmoLrpOEktwRluXvOmmfEWxZkxUNIqZKuzbaUmLKBYrXMmdOYLEzljzbSJnqRbSiAFyUNyyieKITkh
mvkKyosXKCaTsXQIKczJmxuqIEKeGGGwZyWTolQynlWngjDzFMlwhJFEmODeycbEfxgSRbIXySfwlhZZ
BUBhKyGBHRzWGRXAzarcmSDORvaOMOqYlcVIMwlHGtrLMhFWioqeKfvsJdTXmfQzavzSzCRrVzLFMaBT
DMOPFJcjzXcPvBkzacRmVKTQAvVobGRBypFHvoUdjvBhwWXVdDjvfJOocyIHbMqZGMaRaaFFnmtvTSkY
nIHbmPAtuEszMDFURBYxcOJXKMvJbfSbhiaacxhxiZBnoHTcFeqXQfjTqpcMKFpvvzkpSxlDxSlhikFZ
XSplcknpxiZfwUwGsrfpBUkevEiwndkKrVpWKufWpLTWXcyyXehOcDfnzgTAkhwOAcaiHqJWzsuAvMyD
pDJgeCdAJMwatRfcpKQGTkwxHracsYOlZeXoGthHIRfDBYzhuGEQRKFRnqSEbWDCJObWSAoSwFzVZEnI
rVBwXibUaTwnSTwRmIwkIgoGPRiOMLOTvnzEBBCfcugYZwGSsHRKCJoRsxxzRkKwnTRcRNfbMGssqmXV
IKYzyWHIsCjdzxiHEtvHaufVgcoqVkqIQertevTUTIVMYlNXCGEUzQowqsFpciURKoUwqCRogxeghOWs
cMnuAathgFvNIVqqXpmdJDJPhXQpZCyNbTYktMyTUtQEBeQBhEZzqHotmYREADhFodlcPmTMutBZyefW
sBmsnUbVnHUGAyaDirMoowBwXnzrmfHJgfpAquFoHTuvQvIJcjqiqVdntXbgwpVywbsKxqUMNxYVxBmQ
OAcxOAVPuJeOgABYEHhevhnUOgCUuTBAhJcUGsasbMInGCbHnHXWDdXijDRkUYFuOytTcMPtWklmTHTR
XFTfcFfSSqFUFbQVCKEjUOLveXtsHrIfkphXyDkRELnaTfuaZUClLqbdpWAREJHJpycYRDjElqlVeNya
kTCjDpvFrdnlXogrDZdQzAYaePDdfvHWdcaQGgrrHKBdMnMYbsikbkffVsITSUhEapmLGQYbHoiKGRcg
GPLeEvmCOAkGIuDBdnYPlzuUmLOfetGXpbTbPjjWCZiOJxlDazSbEPVpnNLDsLiwlgleiCdPezQwnNWT
ECLuRGpfJZlnZtcghLucmvlOZNwXaikbKGmoGZJIcsfNnmaHIcPXiEYDHjLKpVtNsqemAmaiTIzvLqlU
mlcvraikZozZwBoExUkELoiaAbTAkqDhrARHQyAvWvYUjthfWjZqbQNTnkgmySsORxGcxouYcyCSkjmC
fpTGOlFoXWLINurMZdQURRnZCiZqsEKeVVZdFMnaoUepdAdARtUuXTvkGzmpEVNZiYSWJAwkcSKgAWTD
mUNVxVebIiavuOAxWUBkuUkXCYtRoZhVNwCZGlaANNpBvXgSDeLURUdQnQteKAXbGlOLGYYYCzCGjzua
UmrdPYuRrUBvLFfwBGTiABTmpANdPCptqKwWXARMKrtmbggOBDgNkeHzNUCIXUIuOAavRbLTnzNNRgzL
boTJooLJIdVFbbjWNngnzPznJglCLEWqulqzSuAyvqYdivDqxEtYPKTwVheFmDidEOnLqjPHBcjoOVvt
MCDmQfwNxkOPuxiJqLQOPRAGJappmpikgmrvRAlKjFjTlaznQldBJmzSMDvCWghWOgfhfkHFZBNdbmMf
MsaQHrtJQvZuGFCrPVBNSNZBFZRdpmQNZYZXpkGjXRAXhELlxDfGhiXwgAUujQbqUCiKaRIYruNDRDlL
zInUkJBpySRZoqwQlqmoxADBjjtGjFPLTkcexYGwGYlANZQaXNgKkPXUUqlViVzxPxxtMQPqOxTcChCg
dvKNliVwzRfMmSsBFeuePnbmVqvyfdOXnZpUopEqfCMnnXpfZnNYwNKiZFPUWWmNCMibsyQEhiodVjTz
UxsicVsZNMXyvBLrdJxGGeCPEutNCzYBRamXwRlmVdqUTPnUoAWaVDshgTHZhvhVlLZsoqbyqOjJMPac
hHqiCKhgFkDUhUDSwsrEwaBrKhXINTjYmHvsTyFdRHliydbfQtRFZcsSTfcSfqyIgQuXLZnrdAwylBmW
BRbmVwdoNFcnoxMKHaYOhgihIsKitcrgEkfjIOKsDPOadFhMwVSKWeCfxxxfWjgNiGDaiYDtMhCgedOR
nTYoeVrpGsyDIsuKhffqaEqoqfWukaQlcUShYicuZAdoYVGvRchUgcmNwxQGogDvKhyAkIuqHCIXQfXp
CtkSSTXTugolUKfqSzugIOpyHhIlcTjDBTKPqcyaRhmgFdSBkYurnvnukNGVoxpZBFmwIEmehuaUcoeu
btkjJqKcAAqxgrKcoRGuqHVUHqKgEaqRCIXlaTqaUewJBEWnTnTJIDYdLeGUMDfndHPYTAGQbhxreADo
WZtdvbJVnNGRNvlAsqIPlpXSXEZGBdqVyNCCwylcXprVoGqnPXZioKnqbdrYlDhbsTVDJqRQKoPtQXzu
RnrGgCfYfeRRxiihjItxHurPwtYJoObDzlEABeIRxQocvWrJtyWchmZXJdYvTgicUircdiMKYAkNbdKu
gPpzXnTQIZxtIhvfBfjIHRaDXbYExxYBvrejpEaVHlinHlYRrhsbChnAwTKlQtHntqcqiXZwTUEdlsVy
WFdZNRfqzkhWzeKMGmkuKoSkuSZRkddsuBNFVMFLPeUkLwCCDKagNjMZwtHcVcEEKyjAYubHipuqNjaV
JukystpMZrhBgLqRVMpaIPsyAvYIsBDVqKNCMLqLwyhJhuWDdCPBgSzJTLkJvaGPirOFwfuMtkyXeKoZ
rGPRJqXyhdYNOXVSqGvbSPozAbjhpyfgGVuNUYaRQomzrTtzAMJnYnyvDnuBkbVvmYzhlhqmwgCZaGJG
GGRbaFdfnDlUfCfhpDWTkWfpUDuUksJvRFNxVYBKGoxBCdhmYZwyDPzWihcQXgByRbYxWZslVsbuTHTf
vaulICCTRkkiYuYoqFdzuxsqOBkzEJHbNXhSnHYxyeGoEklCeaUVEtjxmXyOEzcpsAhfKCTejxOxwGYh
eLtoPpPINviTCHUsgzSkycIxtvekMaoZkBIyLboyvMxxaqfviBxkSALNjiNYqGTypcZDvHonaVBZCSLp
SjRTsJmDuPwKnYwCdTprFvbXnrhARNToXpryIfEoIwSWIdfSKeOHDYwgyUvwXXpKUKQEiyZxCsTkAjME
hdxShAAUYJTkprXuFITxxJuKMiphRAyAeUFZgknMMLvUaSjiMlGmLARvTMpllxEQyfvEqkcONHVFcaTW
tqcbVrgeTLTGuJsrjZdYrrjtoLKcEfjkIhjzXgEkYhZggujFJuQlVtSqvuejtxAEqjgXrYjmwLkSRmXp
pkTfONxRyAxRYqJccLxuhabwMTWfwLTlzuVGJtVJOXxwKjFIZENpGHwRvTRitDBQBesRYATKhmWmmmbP
EXOzdBHNeghlqpjJFmzXyADNHQNEThWDyMsGsTmyFnywIPvDSIcxHbKQHgmJEcfsPzYvSYIbQjnTAgzF
UfZAbwfgCMRxtmZQQyayJFFhCSVeeUcQzSLWqhENNUpyLZaJsQsFQsPyFIjGtcmoJaFQGKTFtKUBdBBo
xECKHgYSMcBWnzRvPyihfjwyjhTTavfYqOrbrgZDSrwVYFjNsdxLJIigfMgythUoUIVSydOnfhAaesXZ
kfyDztQiBCMHjfEGLFllxfejLJjanZVRENsXhIxSWDgbvHHOAFtHzqdfquGbdQvOFlhDiWpxwEolxbep
fVfpKYGMNIQuOlmtTkNRDFTVMtVkEXYUDZKfEihbxXsSLGDcKSHSMXZxAturZVEQgismVAgMVVatqjBM
rXeHaGdccPJMlqhVAePDyEoIRTLCwJpkNTuOjEKEvXaAGhWmhWPHCBMVPkcPklbGIvzMzOFplRUsvZbE
vScmmoKktOUVOeKBcqVvoSsplqqssDvLiPqucbrxoNkodsbrZnvoDfyNGyUAURseEuJPUWsEiVCNcUNd
sxzoRVpEFuFloqWLumNVJITKXnWnOlGpCaQgTLJYizixXoxAHHbodRtPHBbnSzZRZOmlWKOQqvHWAhDh
cYBGRQsFwyesMILhiwjnvjeMIZnHYHYNrmOahjrVPuRgsxdfgUbKCZAVfcOizDeQLKiFQmQQUlDHnCQe
lMnlLSrtXhmGDqISCgElUrZXbXjGGkdWadBbxzVojGQwyhAbWMhSKFFwoIqJfIDdZjUdfCYFkpDdIuWe
aFIUFhnlsREthBRoaquSzBVVOPABfuAYZpoalZwNfZMPOptcoQYVUdRYlXuYChPAdRJgFgwPyTszSXIe
qHRtMxyNlPGoBfpjxHnNvwIADmJmquLgMQGtpJAyvflZjFwAgIymerCTnVkjvqPKFVRscOqAhqvCqCjw
BBojzXKIdphOVTFKhBpnIWYRfuqvQZgVMaqNBkYKzqGaEnBFKZukSLdPbXNmcZtMeykLwlLbZqaHayOb
IWZvbxEXXnaozCHeyiYMnWqIAwJxhMIPDsgySMKhdBYmdrGdbJOfJralshwvhWlmatTsylewdimJEzph
tuTzSGOkGDPPvltRVJPdHRPBTAsKWncfjjuHdlEVOeZIvVnUFHmyGTFDlMGVyAIdzLocbTXIHYTopIok
UHFAVjEXPlsMoKTriyGnfeTlVzvGhVZzUAWWPdZNdIxKioQylFMJZmSToyRGsDJKJXQxPkINvmoHCVUc
RIjImkWWxTnDLQiXdmHqQrWBuvguUUubGByTRnJfkNWxsSupcfIVgboDWzqYHEfAnIKCfdYUOslfXPax
YnaJfNLqJgcxRjBmRpOYgNpZOpzMOCVIRiiXdIqqFxPJhQqJadKiCesOsZoWGWbbQSVRZUlbNZdzeUTE
nhdMSCKCPbpWZguZHGkLiWCisjqnaLbJpbRFAHPjGbHOXKZQXoQQZohmVqjTcdWNhXEjPlLKnjpwbMPQ
ybzDvGgkybXtbDmjQuyOrMrcYGRGGfuuPXzieaetSBidnSRPsLaXKGcxDkXmHbqMWZJXsQkwtojlxOeU
KSIFdVvNEnOUmIZDdlnwtJcPBlcpRWNTazpzgItwJotSLWZruzrMlSGASMWDwOqTpeYYHaTHCCurPdwB
AWzUtwblZXNrBYdjUoDacvmRVURqOzUPlnFISsZMFPtthnDHSsFgkYfsMtXFuNPhLTleWVrmelyFaemo
bVIhEAxNwOUDQCOCDIBHsQlFxCbHErKiBsvQNjuIGnIzZiwoVTdUZnucSaKdHrxJeGQfTawFJefGJFFa
GHzELfnGBmkZyorbbDDwhvEVeIYIGLPMEuZduqFjbeWbVfzVIRZNXwPLgcYUsevuhEQXfYcJshYnJaWz
iqvlswEBRKNYEJidlzdWnQJpBtyjHYVpkQGzdYkeREqjhmmnUIbGZVnwwaMKqgXfURSICNxdteUSGhGZ
UEEFhWRoTKGRwFmPpZPOsalsrNOlkTdXqGKoWlWkqJvYYrtLiTfhdItMbbhdumSYgCcQVUARnYFWkCsC
jElZxrQHIlbTHFLOnrutlvyxzaSIdkJgeyMUnUmtXfnaIedbAInAuQssOQqBTLbvFRiqKqUSdUEmcRmN
LvAxlgliymfbjTwDSqNTLcAEIerzpUShNKkuehciEAYeGJOFFcOvurJFUyfZhQqzfaneiBcrPhaphSCB
StQiJvtoPhHcLUbriDUIfifVFnNtJfGlmcbQJSXsZfVjpbqnkMllUmHzLvEuSarSlNlNHsWvYlfhjMEA
epYTjoRGZeAAtURFeDfDxTYmOmONuQQBdcdncFGjhHmKlwqmUWoXuIXIxaaXnNThgPGtIlynrUIPLQTG
xXhattDrfBGbZRveKbgjzxJLdYREQlMeLtcIEUoyJocdAfUbymxuFLVjGkOQniiPParqoyQYfDYAQTkM
WLicLxpEFkBbwlKrTyYilKTtYkpVGxtOjYmcBDOrwFhFiGutmpTyTarUbVUeSevBTdaPDpjRkaEmLJMg
WsMhSGfIcBChcqrRKgKpjvGnFipjswgjetRtniMagakbCXAjpzWTtMlgZGCJwGyglpcLebrKWhgwJfWV
qGifWNEpCtjuejHoyVCdIxzMYGnfoslgTNAJdtVBWDVoGLzHSAVBTnhNIvAOExQNiJOIPPiHkdaRbfaP
ixDDoCDOOeAqvQJFxLWDICfGmufyxmaMshbvcrtjqqVtffZTnbtCOQfzRMGwOQEKaAmSWjnYdNgvdkmd
dQmaKZSdqKNrnvJlcyVMKuNWmuoOeyKecgjXbmSqnpjwJEaDYoehEklEgJyiksGxdEKgfYRXQecRZgfe
qKWGc'''
    length = len(str1)
    list1 = []
    for i in range(length):
        if str1[i].islower() and str1[i-1].isupper() and str1[i-2].isupper and str1[i-3].isupper and str1[i+1].isupper and str1[i+2].isupper() and str1[i+3].isupper():
            if str1[i] not in list1:
                list1.extend(str1[i])
    print(list1)
        
function1()

麻烦问问，为什么会出现string index out of range？
出现string index out of range的原因常有哪些，感觉这段时间经常碰到，在函数里面对于print（）语句往哪摆，感觉有点傻傻分不清楚。
我是小白，麻烦各位尽量能用质朴一点的语言描述，感激不尽！！！

最佳答案

月排行榜 / 总排行榜

_2_

2020-4-26 12:31:28

字符串越界
类似的还有 list index out of range 等

if str1[i].islower() and str1[i-1].isupper() and str1[i-2].isupper and str1[i-3].isupper and str1[i+1].isupper and str1[i+2].isupper() and str1[i+3].isupper():
#                                                                                                                                             ^这里越界

跳转到最佳答案楼层

_2_

字符串越界
类似的还有 list index out of range 等

if str1[i].islower() and str1[i-1].isupper() and str1[i-2].isupper and str1[i-3].isupper and str1[i+1].isupper and str1[i+2].isupper() and str1[i+3].isupper():
#                                                                                                                                             ^这里越界

zltzlt

把第 108 行改成这样试试：

for i in range(3, length - 3):