第一版本：修改名字文件，不对序列处理
比如序列名字如下，仅仅需要物种名字

>MBZ0548397.1 glycosylating toxin TcdA [Clostridioides difficile]
>WP_238562585.1 YopT-type cysteine protease domain-containing protein, partial [Providencia rettgeri]
>HBG8546675.1 glycosylating toxin TcdA [Clostridioides difficile]HBG8645274.1 glycosylating toxin TcdA [Clostridioides difficile]
>WP_218726216.1 T3SS effector HopA1 family protein [Pseudomonas sp. D1HM]MBW0235923.1 hypothetical protein [Pseudomonas sp. D1HM]
>WP_021426113.1 glycosylating toxin TcdA [Clostridioides difficile]EQK09456.1 toxin B [Clostridioides difficile P59]
>WP_013184208.1 T3SS effector HopA1 family protein [Xenorhabdus nematophila]CBJ90088.1 Mcf2 [Xenorhabdus nematophila ATCC 19061]CEK22955.1 Mcf2 [Xenorhabdus nematophila AN6/1]
>MBH7539202.1 glycosylating toxin TcdB [Clostridioides difficile]MBZ1146783.1 glycosylating toxin TcdB [Clostridioides difficile]HBG0802012.1 glycosylating toxin TcdB [Clostridioides difficile]HBG1566612.1 glycosylating toxin TcdB [Clostridioides difficile]
>WP_107595625.1 glycosylating toxin TcdB [Clostridioides difficile]
>XP_046086339.1 TcdA/TcdB pore forming domain-containing protein [Lentinula edodes]KAH7875245.1 TcdA/TcdB pore forming domain-containing protein [Lentinula edodes]
>WP_038220508.1 T3SS effector HopA1 family protein [Xenorhabdus nematophila]CEF30096.1 Mcf2 [Xenorhabdus nematophila str. Websteri]AYA40386.1 hypothetical protein D3790_07925 [Xenorhabdus nematophila]KHD27510.1 hypothetical protein LH67_17565 [Xenorhabdus nematophila]MBA0019061.1 hypothetical protein [Xenorhabdus nematophila]MCB4424435.1 hypothetical protein [Xenorhabdus nematophila]
>WP_230086495.1 hypothetical protein [Providencia alcalifaciens]
>WP_095890640.1 glycosylating toxin TcdA [Clostridioides difficile]PBF18588.1 peptidase C80 [Clostridioides difficile]
>WP_095890783.1 glycosylating toxin TcdA, partial [Clostridioides difficile]PBF46244.1 peptidase C80, partial [Clostridioides difficile]
>WP_093403197.1 cytotoxin [Pseudomonas sp. NFPP19]SEP70755.1 TcdA/TcdB pore forming domain-containing protein [Pseudomonas sp. NFPP19]

利用python脚本加正则表达处理；
思路：正则匹配 “[” “]”这俩符号，然后为列表，读取列表的-1索引

import re
import sys
for line in open(sys.argv[1], 'r'):
        my = re.findall(r'\[([\s\S]+?)\]',line)
        print (my[-1])

使用：python 脚本.py 名字文件.txt > new_name.txt
结果

Clostridioides difficile
Providencia rettgeri
Clostridioides difficile
Pseudomonas sp. D1HM
Clostridioides difficile P59
Xenorhabdus nematophila AN6/1
Clostridioides difficile
Clostridioides difficile
Lentinula edodes
Xenorhabdus nematophila
Providencia alcalifaciens
Clostridioides difficile
Clostridioides difficile
Pseudomonas sp. NFPP19

第二版本待更新（更新实用的正则表达用法，外加序列，彻底解决序列名字问题）

作者：luanxins@163.con
欢迎指导！