在python中，如何根据每个字符出现的次数对以下字符串中的字符进行排序？我想要排序的示例文本是 -
uwlcnfcejefjudkmylhmmpjfkmhveozojepfvgboboxknkfdoghkvzxrkamhaghahpnnzh_figzhelkapd_dnxsiurbjgq_bcctqgigfksdrzgtxvihiqvfvinuqfzgohvilwyxpuqjolleuecpxcbisaptnoxbglpkhsvvwdgaminprfrha_uemwdepnngtxgkqx_flerkbnnzazcvnh_sealovrpuafumrmaizidjedvovhtbadjelfrbknpioqiindxqiozzpdrv_bwooblumjc_oqtcgrfmxkwkczhhqiwuqzoznqgfmbdxrxigvkebypbsybanuccpsezgv_dvteybbrbrbldbpiyhgzkptloxfktrzkjmdhppucsaohfnehdnlnhexwj_yhulslwpdreogjsffy_fkqcdkobywhqxpjvv_sqbscknxrew_ivgvpolmqfkyxoxzuyqctriyxcncwvvqhdupkagguee_zfbcrexbtkcsbnjcfzqoq_wrdktpsclzrmeybxpzrylfdydknd_zbjjqcnubpjbfaaecuxbeprjjjfcybvcghfbcvnjicpliwzkqvwo_hloynyjrmiqvubsyobetklnsgovesswqatrcrirsywdvbpwnhtjaug_nglxamsybkop_gnkdvgzp_cmyxclrtjtoohniuszzbnakknd_ahe_enbouxvpueotcjebex_vpqbwyjgczobcirmgfvwnlrxaryoltdlozwdgcp__iwu_vkod_kzkmeklloeixrxymlvyvtlfyydwtzxugrhxwqgmmsvtshrublypevlpglldlumsbscjuv_cbtfjpenrervyxtbrxaaqsqs__boiiubqmgwtvzxlnxxyskbwquztepk_uggukayehrifcrdpcnrfhmlucqzbsvoojsfexvbzsrccyqjuufbiae_siovpbhhqzkcemm_wtzio_d_emtkxpkpqftqjrhiiuvyijtwrmj_r_nlsaqemp_yph_murlmwwibzxnerld_fracudoxwqsmjkdvbfbnmkvktrkyyoct_woymzxswtd_dvs_joviugjjvswlltkforlv_xdokzbqkzrojvevuuzkpcvvaarca_oeryyuasilqpwrzkyrsbskjnywidkcefjdekawqutrihusqtq_bjaaysidwvpmhozxcsacpehceplbihgnuaucvatj_prb_fflzfyyrndrxq__ptxkcbhhslnuuwljwxbxzbujntztebr_knnffhl_cvxowdtpxldvsonhnfxxnmwopu_tgosofhhjhmxkdnvorwlsxy_cleasbnonadrgxf_bzipudfonthlclvnhumrbjkdryoawoz__ttftltixhdhd_qoteqmyehlulpffaqmughpxxsyeevncin_ymjsnndirfg_jjcltmgphlpudrjviaixlxnpwvr_bqygvuhoskhtv_pqnyzmjymrpnphebxqfpkfhzirotxayvclcr_zcrtsakfusyyujzdjgizngmonogwknjcndlpvktgntgajmzwcnkhggmhzijyrpbkpdcribyteyqchlldzeelebqjplphcdgpaaatdelz_khxpxqclexvlcjiyssgsgmsddclgmsae_eubvmscpjwascwegqdxvvh_zuteauydayapfamxilyugubce_kibquetsvlmguecrm_uojvkjammyevgxwfcfq_fjnauajadhsjvtsduzpmqecxfuqaaq__qhtvl_uurqaquuygypqxnhrnhhiwrufntlunfqwaydimaahiihvcaycinidodqzmrnxnnxdsquwc_u_zrrkscjv_jwsp_xfkupx_rcbzovpsbwyiumeaanyiaqromomqldfprejqnytjftdcklykzsdupl_makofxndacjbbftywdxmvmfv_wogpggfeivpfiqqlzcweelzclxkgqlvysuignftxqooofgvnopvtjy_udsf_wx_wloyznfixdeyxbvqljuncfmtvjhrrrpcxowggllwcmzlp_bgwpepdntxzjbqprgdtpdbtofhwknqdarbqvryfaiq_lneqwlwpjpfxbmttidphupuhwghgafybhtulwkgpoavwbtixuvqroknoas_pvufqfanwdvzraqpxudodpifa_s_xiaef_abeawgaamorlogpmmavrwbt_bzthsnzaxzitbyuohtqswnqekujrojerffenhkna_nyioesdgaeofpuoyoybuweuswzaraanyzkaxuncumlsnzoavkmjoejygohgtrqtdouiubigjhrutk
排序后，我必须删除下划线字符“_”之后（包括）的所有字符
这是我尝试过的 -
from collections import Counter
class Solution:
def frequencySort(self, s: str, text: str) -> str:
c = Counter(list(text))
# Create a list to store characters from 's' sorted by frequency in 'text'
sorted_chars = []
# Iterate over the unique characters in 's'
for char in set(s):
# Repeat each character by its count in 's'
sorted_chars.extend([char] * s.count(char))
# Sort 'sorted_chars' in place using a loop
for i in range(len(sorted_chars)):
for j in range(i + 1, len(sorted_chars)):
if c[sorted_chars[j]] > c[sorted_chars[i]] or \
(c[sorted_chars[j]] == c[sorted_chars[i]] and sorted_chars[j] < sorted_chars[i]):
sorted_chars[i], sorted_chars[j] = sorted_chars[j], sorted_chars[i]
# Join the sorted characters into a string
output = ''.join(sorted_chars)
return output
solution = Solution()
sorted_string = solution.frequencySort("abcdefghijklmnopqrstuvwxyza_", """
uwlcnfcejefjudkmylhmmpjfkmhveozojepfvgboboxknkfdoghkvzxrkamhaghahpnnzh_figzhelkapd_dnxsiurbjgq_bcctqgigfksdrzgtxvihiqvfvinuqfzgohvilwyxpuqjolleuecpxcbisaptnoxbglpkhsvvwdgaminprfrha_uemwdepnngtxgkqx_flerkbnnzazcvnh_sealovrpuafumrmaizidjedvovhtbadjelfrbknpioqiindxqiozzpdrv_bwooblumjc_oqtcgrfmxkwkczhhqiwuqzoznqgfmbdxrxigvkebypbsybanuccpsezgv_dvteybbrbrbldbpiyhgzkptloxfktrzkjmdhppucsaohfnehdnlnhexwj_yhulslwpdreogjsffy_fkqcdkobywhqxpjvv_sqbscknxrew_ivgvpolmqfkyxoxzuyqctriyxcncwvvqhdupkagguee_zfbcrexbtkcsbnjcfzqoq_wrdktpsclzrmeybxpzrylfdydknd_zbjjqcnubpjbfaaecuxbeprjjjfcybvcghfbcvnjicpliwzkqvwo_hloynyjrmiqvubsyobetklnsgovesswqatrcrirsywdvbpwnhtjaug_nglxamsybkop_gnkdvgzp_cmyxclrtjtoohniuszzbnakknd_ahe_enbouxvpueotcjebex_vpqbwyjgczobcirmgfvwnlrxaryoltdlozwdgcp__iwu_vkod_kzkmeklloeixrxymlvyvtlfyydwtzxugrhxwqgmmsvtshrublypevlpglldlumsbscjuv_cbtfjpenrervyxtbrxaaqsqs__boiiubqmgwtvzxlnxxyskbwquztepk_uggukayehrifcrdpcnrfhmlucqzbsvoojsfexvbzsrccyqjuufbiae_siovpbhhqzkcemm_wtzio_d_emtkxpkpqftqjrhiiuvyijtwrmj_r_nlsaqemp_yph_murlmwwibzxnerld_fracudoxwqsmjkdvbfbnmkvktrkyyoct_woymzxswtd_dvs_joviugjjvswlltkforlv_xdokzbqkzrojvevuuzkpcvvaarca_oeryyuasilqpwrzkyrsbskjnywidkcefjdekawqutrihusqtq_bjaaysidwvpmhozxcsacpehceplbihgnuaucvatj_prb_fflzfyyrndrxq__ptxkcbhhslnuuwljwxbxzbujntztebr_knnffhl_cvxowdtpxldvsonhnfxxnmwopu_tgosofhhjhmxkdnvorwlsxy_cleasbnonadrgxf_bzipudfonthlclvnhumrbjkdryoawoz__ttftltixhdhd_qoteqmyehlulpffaqmughpxxsyeevncin_ymjsnndirfg_jjcltmgphlpudrjviaixlxnpwvr_bqygvuhoskhtv_pqnyzmjymrpnphebxqfpkfhzirotxayvclcr_zcrtsakfusyyujzdjgizngmonogwknjcndlpvktgntgajmzwcnkhggmhzijyrpbkpdcribyteyqchlldzeelebqjplphcdgpaaatdelz_khxpxqclexvlcjiyssgsgmsddclgmsae_eubvmscpjwascwegqdxvvh_zuteauydayapfamxilyugubce_kibquetsvlmguecrm_uojvkjammyevgxwfcfq_fjnauajadhsjvtsduzpmqecxfuqaaq__qhtvl_uurqaquuygypqxnhrnhhiwrufntlunfqwaydimaahiihvcaycinidodqzmrnxnnxdsquwc_u_zrrkscjv_jwsp_xfkupx_rcbzovpsbwyiumeaanyiaqromomqldfprejqnytjftdcklykzsdupl_makofxndacjbbftywdxmvmfv_wogpggfeivpfiqqlzcweelzclxkgqlvysuignftxqooofgvnopvtjy_udsf_wx_wloyznfixdeyxbvqljuncfmtvjhrrrpcxowggllwcmzlp_bgwpepdntxzjbqprgdtpdbtofhwknqdarbqvryfaiq_lneqwlwpjpfxbmttidphupuhwghgafybhtulwkgpoavwbtixuvqroknoas_pvufqfanwdvzraqpxudodpifa_s_xiaef_abeawgaamorlogpmmavrwbt_bzthsnzaxzitbyuohtqswnqekujrojerffenhkna_nyioesdgaeofpuoyoybuweuswzaraanyzkaxuncumlsnzoavkmjoejygohgtrqtdouiubigjhrutk ...
""")
answer = sorted_string.split('_')[0]
print(answer)
这个问题可以通过3步解决：
all_chars = 'uwlcnfcejefjudkmylhmmpjfkmhveozojepfvgboboxknkfdoghkvzxrkamhaghahpnnzh_figzhelkapd_dnxsiurbjgq_bcctqgigfksdrzgtxvihiqvfvinuqfzgohvilwyxpuqjolleuecpxcbisaptnoxbglpkhsvvwdgaminprfrha_uemwdepnngtxgkqx_flerkbnnzazcvnh_sealovrpuafumrmaizidjedvovhtbadjelfrbknpioqiindxqiozzpdrv_bwooblumjc_oqtcgrfmxkwkczhhqiwuqzoznqgfmbdxrxigvkebypbsybanuccpsezgv_dvteybbrbrbldbpiyhgzkptloxfktrzkjmdhppucsaohfnehdnlnhexwj_yhulslwpdreogjsffy_fkqcdkobywhqxpjvv_sqbscknxrew_ivgvpolmqfkyxoxzuyqctriyxcncwvvqhdupkagguee_zfbcrexbtkcsbnjcfzqoq_wrdktpsclzrmeybxpzrylfdydknd_zbjjqcnubpjbfaaecuxbeprjjjfcybvcghfbcvnjicpliwzkqvwo_hloynyjrmiqvubsyobetklnsgovesswqatrcrirsywdvbpwnhtjaug_nglxamsybkop_gnkdvgzp_cmyxclrtjtoohniuszzbnakknd_ahe_enbouxvpueotcjebex_vpqbwyjgczobcirmgfvwnlrxaryoltdlozwdgcp__iwu_vkod_kzkmeklloeixrxymlvyvtlfyydwtzxugrhxwqgmmsvtshrublypevlpglldlumsbscjuv_cbtfjpenrervyxtbrxaaqsqs__boiiubqmgwtvzxlnxxyskbwquztepk_uggukayehrifcrdpcnrfhmlucqzbsvoojsfexvbzsrccyqjuufbiae_siovpbhhqzkcemm_wtzio_d_emtkxpkpqftqjrhiiuvyijtwrmj_r_nlsaqemp_yph_murlmwwibzxnerld_fracudoxwqsmjkdvbfbnmkvktrkyyoct_woymzxswtd_dvs_joviugjjvswlltkforlv_xdokzbqkzrojvevuuzkpcvvaarca_oeryyuasilqpwrzkyrsbskjnywidkcefjdekawqutrihusqtq_bjaaysidwvpmhozxcsacpehceplbihgnuaucvatj_prb_fflzfyyrndrxq__ptxkcbhhslnuuwljwxbxzbujntztebr_knnffhl_cvxowdtpxldvsonhnfxxnmwopu_tgosofhhjhmxkdnvorwlsxy_cleasbnonadrgxf_bzipudfonthlclvnhumrbjkdryoawoz__ttftltixhdhd_qoteqmyehlulpffaqmughpxxsyeevncin_ymjsnndirfg_jjcltmgphlpudrjviaixlxnpwvr_bqygvuhoskhtv_pqnyzmjymrpnphebxqfpkfhzirotxayvclcr_zcrtsakfusyyujzdjgizngmonogwknjcndlpvktgntgajmzwcnkhggmhzijyrpbkpdcribyteyqchlldzeelebqjplphcdgpaaatdelz_khxpxqclexvlcjiyssgsgmsddclgmsae_eubvmscpjwascwegqdxvvh_zuteauydayapfamxilyugubce_kibquetsvlmguecrm_uojvkjammyevgxwfcfq_fjnauajadhsjvtsduzpmqecxfuqaaq__qhtvl_uurqaquuygypqxnhrnhhiwrufntlunfqwaydimaahiihvcaycinidodqzmrnxnnxdsquwc_u_zrrkscjv_jwsp_xfkupx_rcbzovpsbwyiumeaanyiaqromomqldfprejqnytjftdcklykzsdupl_makofxndacjbbftywdxmvmfv_wogpggfeivpfiqqlzcweelzclxkgqlvysuignftxqooofgvnopvtjy_udsf_wx_wloyznfixdeyxbvqljuncfmtvjhrrrpcxowggllwcmzlp_bgwpepdntxzjbqprgdtpdbtofhwknqdarbqvryfaiq_lneqwlwpjpfxbmttidphupuhwghgafybhtulwkgpoavwbtixuvqroknoas_pvufqfanwdvzraqpxudodpifa_s_xiaef_abeawgaamorlogpmmavrwbt_bzthsnzaxzitbyuohtqswnqekujrojerffenhkna_nyioesdgaeofpuoyoybuweuswzaraanyzkaxuncumlsnzoavkmjoejygohgtrqtdouiubigjhrutk'
# store in a dict the characters with the number of ocurrences
count_chars = {}
for c in all_chars:
if c in count_chars:
count_chars[c] += 1
else:
count_chars[c] = 1
# sort the dict by the values reversed
count_chars = dict(
sorted(count_chars.items(), key=lambda item: item[1], reverse=True))
# get the chars until '_'
message = ''
for c in count_chars:
if c == '_':
break
message += c
print(message)
使用
Counter# your code goes here
from collections import Counter
string = "uwlcnfcejefjudkmylhmmpjfkmhveozojepfvgboboxknkfdoghkvzxrkamhaghahpnnzh_figzhelkapd_dnxsiurbjgq_bcctqgigfksdrzgtxvihiqvfvinuqfzgohvilwyxpuqjolleuecpxcbisaptnoxbglpkhsvvwdgaminprfrha_uemwdepnngtxgkqx_flerkbnnzazcvnh_sealovrpuafumrmaizidjedvovhtbadjelfrbknpioqiindxqiozzpdrv_bwooblumjc_oqtcgrfmxkwkczhhqiwuqzoznqgfmbdxrxigvkebypbsybanuccpsezgv_dvteybbrbrbldbpiyhgzkptloxfktrzkjmdhppucsaohfnehdnlnhexwj_yhulslwpdreogjsffy_fkqcdkobywhqxpjvv_sqbscknxrew_ivgvpolmqfkyxoxzuyqctriyxcncwvvqhdupkagguee_zfbcrexbtkcsbnjcfzqoq_wrdktpsclzrmeybxpzrylfdydknd_zbjjqcnubpjbfaaecuxbeprjjjfcybvcghfbcvnjicpliwzkqvwo_hloynyjrmiqvubsyobetklnsgovesswqatrcrirsywdvbpwnhtjaug_nglxamsybkop_gnkdvgzp_cmyxclrtjtoohniuszzbnakknd_ahe_enbouxvpueotcjebex_vpqbwyjgczobcirmgfvwnlrxaryoltdlozwdgcp__iwu_vkod_kzkmeklloeixrxymlvyvtlfyydwtzxugrhxwqgmmsvtshrublypevlpglldlumsbscjuv_cbtfjpenrervyxtbrxaaqsqs__boiiubqmgwtvzxlnxxyskbwquztepk_uggukayehrifcrdpcnrfhmlucqzbsvoojsfexvbzsrccyqjuufbiae_siovpbhhqzkcemm_wtzio_d_emtkxpkpqftqjrhiiuvyijtwrmj_r_nlsaqemp_yph_murlmwwibzxnerld_fracudoxwqsmjkdvbfbnmkvktrkyyoct_woymzxswtd_dvs_joviugjjvswlltkforlv_xdokzbqkzrojvevuuzkpcvvaarca_oeryyuasilqpwrzkyrsbskjnywidkcefjdekawqutrihusqtq_bjaaysidwvpmhozxcsacpehceplbihgnuaucvatj_prb_fflzfyyrndrxq__ptxkcbhhslnuuwljwxbxzbujntztebr_knnffhl_cvxowdtpxldvsonhnfxxnmwopu_tgosofhhjhmxkdnvorwlsxy_cleasbnonadrgxf_bzipudfonthlclvnhumrbjkdryoawoz__ttftltixhdhd_qoteqmyehlulpffaqmughpxxsyeevncin_ymjsnndirfg_jjcltmgphlpudrjviaixlxnpwvr_bqygvuhoskhtv_pqnyzmjymrpnphebxqfpkfhzirotxayvclcr_zcrtsakfusyyujzdjgizngmonogwknjcndlpvktgntgajmzwcnkhggmhzijyrpbkpdcribyteyqchlldzeelebqjplphcdgpaaatdelz_khxpxqclexvlcjiyssgsgmsddclgmsae_eubvmscpjwascwegqdxvvh_zuteauydayapfamxilyugubce_kibquetsvlmguecrm_uojvkjammyevgxwfcfq_fjnauajadhsjvtsduzpmqecxfuqaaq__qhtvl_uurqaquuygypqxnhrnhhiwrufntlunfqwaydimaahiihvcaycinidodqzmrnxnnxdsquwc_u_zrrkscjv_jwsp_xfkupx_rcbzovpsbwyiumeaanyiaqromomqldfprejqnytjftdcklykzsdupl_makofxndacjbbftywdxmvmfv_wogpggfeivpfiqqlzcweelzclxkgqlvysuignftxqooofgvnopvtjy_udsf_wx_wloyznfixdeyxbvqljuncfmtvjhrrrpcxowggllwcmzlp_bgwpepdntxzjbqprgdtpdbtofhwknqdarbqvryfaiq_lneqwlwpjpfxbmttidphupuhwghgafybhtulwkgpoavwbtixuvqroknoas_pvufqfanwdvzraqpxudodpifa_s_xiaef_abeawgaamorlogpmmavrwbt_bzthsnzaxzitbyuohtqswnqekujrojerffenhkna_nyioesdgaeofpuoyoybuweuswzaraanyzkaxuncumlsnzoavkmjoejygohgtrqtdouiubigjhrutk"
freq = Counter(string)
most_commons = freq.most_common(len(freq))
result = []
for a, b in most_commons:
if a == '_':
break
else:
result.append(a)
sol = ''.join(result)
print(sol) # unprovable
Countersortedfrom collections import Counter
# get frequencies from the text
counter = Counter(text)
# sort the string by text frequencies
sorted_string = ''.join(sorted(s, key=lambda ch: counter[ch], reverse=True))
# find the underscore and cut the string up to that position
result = sorted_string[0:sorted_string.find('_')]
result
# => 'unprovaable'
请注意，这会保留输入字符串中比下划线更频繁出现的所有字符：由于输入字符串有两个
aa