python：文本中按行取变量给命令行

如下，分别取第一列，第二列各值作为命令行参数。

1 文本

AF34-13 AF34-13 0
AF67-21pH9TA AF34-13 0
AF81-08TA AF34-13 0
AM27-31LB AF34-13 0
AM49-4BH AF34-13 0
AM53-13BH AF34-13 0
AM59-24XD AF34-13 0
OM05-6BH AF34-13 0
OM05-9BH AF34-13 0
OM07-10AC AF34-13 0

2 一行行读取，取值，给命令行

#!/usr/bin/env python3
import os, sys, re

num = 1
with open("melt.txt", 'r') as f:
    for line in f:
        line = line.strip()
        g_1 = re.split(r' ', line)[0]
        g_2 = re.split(r' ', line)[1]
        #print(g_1,g_2)
        command = "fastANI -t 16 -q genome/{}.fna -r genome/{}.fna -o result/{}.txt".format(g_1, g_2, num)
        os.system(command)
        #os.system("cat out.txt >> result.txt")
        print("\033[32m{}\t{}\t{} done...\033[0m".format(num,g_1,g_2))
        num = num + 1