怎么用python修改fasta序列的ID名字

WP_018731760.1 NAD(P)-binding domain-containing protein [Salinispora pacifica]
MAADNREPVTVIGLGGMGSALARAFLARGHPTTVWNRTPNKADDLVSQGALRATTVADAMSAGKLIVVCV
LDYRAMREIINSTDDTAADRVIVNLTSGTPADARATAAWAGERGMSYLDGAIMAIPPMIGSEEALIFYGG
PQEVYETHAETLRSVAGSGTYLGPDAGLPSLYDVALLGLMWTTWTGFMQATALLASEEVPAANFLPYAQA
WFEHVISPEMPTLAGQVDTGAYPDHESTLGMQAVAIAHLVHASRTQGVDAALAEFLHARAEQAIRRGHAD
DGFGAVFEVLRNPTAQ
WP_018731760.1 NAD(P)-binding domain-containing protein [Salinispora pacifica]
MAADNREPVTVIGLGGMGSALARAFLARGHPTTVWNRTPNKADDLVSQGALRATTVADAMSAGKLIVVCV
LDYRAMREIINSTDDTAADRVIVNLTSGTPADARATAAWAGERGMSYLDGAIMAIPPMIGSEEALIFYGG
PQEVYETHAETLRSVAGSGTYLGPDAGLPSLYDVALLGLMWTTWTGFMQATALLASEEVPAANFLPYAQA
WFEHVISPEMPTLAGQVDTGAYPDHESTLGMQAVAIAHLVHASRTQGVDAALAEFLHARAEQAIRRGHAD
DGFGAVFEVLRNPTAQ

想请教怎么用python写一个脚本实现一次性修改上千条上面这个格式序列的名字，将其修改为WP+数字（1到最后一条序列的序号），比如第一条改为>WP1, 第二条为WP2. 感恩。

import re
def run():
    fasta_str = """WP_018731760.1 NAD(P)-binding domain-containing protein [Salinispora pacifica]
        MAADNREPVTVIGLGGMGSALARAFLARGHPTTVWNRTPNKADDLVSQGALRATTVADAMSAGKLIVVCV
        LDYRAMREIINSTDDTAADRVIVNLTSGTPADARATAAWAGERGMSYLDGAIMAIPPMIGSEEALIFYGG
        PQEVYETHAETLRSVAGSGTYLGPDAGLPSLYDVALLGLMWTTWTGFMQATALLASEEVPAANFLPYAQA
        WFEHVISPEMPTLAGQVDTGAYPDHESTLGMQAVAIAHLVHASRTQGVDAALAEFLHARAEQAIRRGHAD
        DGFGAVFEVLRNPTAQ
        WP_018731761.1 NAD(P)-binding domain-containing protein [Salinispora pacifica]
        MAADNREPVTVIGLGGMGSALARAFLARGHPTTVWNRTPNKADDLVSQGALRATTVADAMSAGKLIVVCV
        LDYRAMREIINSTDDTAADRVIVNLTSGTPADARATAAWAGERGMSYLDGAIMAIPPMIGSEEALIFYGG
        PQEVYETHAETLRSVAGSGTYLGPDAGLPSLYDVALLGLMWTTWTGFMQATALLASEEVPAANFLPYAQA
        WFEHVISPEMPTLAGQVDTGAYPDHESTLGMQAVAIAHLVHASRTQGVDAALAEFLHARAEQAIRRGHAD
        DGFGAVFEVLRNPTAQ
        """

    f_index = re.finditer('WP_[0-9]+', fasta_str)
    f_index.__next__()
    start_index = 0
    fasta_list = []
    number = 0
    replace = lambda x: re.sub("WP_", f"WP_{x[0] + 1}_", fasta_str[start_index: x[1]], count=1)
    for number, i in enumerate(f_index):
        fasta_index = i.span()[0]
        fasta_list.append(replace([number, fasta_index]))
        start_index = fasta_index
    fasta_list.append(replace([number + 1, len(fasta_str)]))
    for i in fasta_list:
        print(i)

# 结果
'''
WP_1_018731760.1 NAD(P)-binding domain-containing protein [Salinispora pacifica]
        MAADNREPVTVIGLGGMGSALARAFLARGHPTTVWNRTPNKADDLVSQGALRATTVADAMSAGKLIVVCV
        LDYRAMREIINSTDDTAADRVIVNLTSGTPADARATAAWAGERGMSYLDGAIMAIPPMIGSEEALIFYGG
        PQEVYETHAETLRSVAGSGTYLGPDAGLPSLYDVALLGLMWTTWTGFMQATALLASEEVPAANFLPYAQA
        WFEHVISPEMPTLAGQVDTGAYPDHESTLGMQAVAIAHLVHASRTQGVDAALAEFLHARAEQAIRRGHAD
        DGFGAVFEVLRNPTAQ
        
WP_2_018731761.1 NAD(P)-binding domain-containing protein [Salinispora pacifica]
        MAADNREPVTVIGLGGMGSALARAFLARGHPTTVWNRTPNKADDLVSQGALRATTVADAMSAGKLIVVCV
        LDYRAMREIINSTDDTAADRVIVNLTSGTPADARATAAWAGERGMSYLDGAIMAIPPMIGSEEALIFYGG
        PQEVYETHAETLRSVAGSGTYLGPDAGLPSLYDVALLGLMWTTWTGFMQATALLASEEVPAANFLPYAQA
        WFEHVISPEMPTLAGQVDTGAYPDHESTLGMQAVAIAHLVHASRTQGVDAALAEFLHARAEQAIRRGHAD
        DGFGAVFEVLRNPTAQ

'''