ch.2 python语法错误:valueerror:无效的int()文本,基10:'21,'

我正在努力通过“暴力巨蟒”。我在第2章中,尝试运行以下代码时收到此语法错误:

python2 portscanner.py -H perl6.org -p 21, 22, 80

[21,][+]扫描结果:www.p6c.org扫描端口21,回溯 (最近一次呼叫最后一次):文件 “/home/wolf/python/viole python examples/chapter-2/portscan.py”, 第53行,英寸 main()文件“/home/wolf/python/暴力python示例/chapter-2/portscan.py”, 第49行,主 portscan(tgthost,tgtports)file“/home/wolf/python/viole python examples/chapter-2/portscan.py”, 行32,在端口扫描中 connscan(tgthost,int(tgtport))valueerror:以10为基的int()的无效文本:“21,”

我主要是直接从代码中复制它,但是我做了一些事情使它成为python3而不是python2,例如为 print() 功能。但是,我对python还不熟悉,我不明白这里的问题是什么。我想是因为 split() 方法?

import optparse
import socket
from socket import *


def connScan(tgtHost, tgtPort):
    try:
        connSkt = socket(AF_INET, SOCK_STREAM)
        connSkt.connect((tgtHost, tgtPort))
        connSkt.send('ViolentPython\r\n')
        results = connSkt.recv(100)
        print('[+]%d/tcp open' % tgtPort)
        connSkt.close()
    except:
        print('[-]%d/tcp closed' % tgtPort)


def portScan(tgtHost, tgtPorts):
    try:
        tgtIP = gethostbyname(tgtHost)
    except:
        print("[-] Cannot resolve '%s': Unknown host" % tgtHost)
        return
    try:
        tgtName = gethostbyaddr(tgtIP)
        print('\n[+] Scan results for: ' + tgtName[0])
    except:
        print('\n[+] Scan results for: ' + tgtIP)
    setdefaulttimeout(1)
    for tgtPort in tgtPorts:
        print('Scanning port ' + tgtPort)
        connScan(tgtHost, int(tgtPort))


def main():
    parser = optparse.OptionParser("usage%prog -H <target host> +\
                                    -p <target port>")
    parser.add_option('-H', dest='tgtHost', type='string',
                      help='specify target host')
    parser.add_option('-p', dest='tgtPort', type='string',
                      help='specify target port')
    (options, args) = parser.parse_args()
    tgtHost = options.tgtHost
    tgtPorts = str(options.tgtPort).split(', ')
    print(tgtPorts)
    if (tgtHost is None) | (tgtPorts[0] is None):
        print('[-] You must specify a target host and port[s].')
        exit(0)
    portScan(tgtHost, tgtPorts)


if __name__ == '__main__':
    main()