python lambda 实现switch

switch.py

# 根据IP和PORT的csv文件，生成URL

def targetUrl(filename):
    urllist = list()
    with open(filename,"rU") as f:
        reader = csv.DictReader(f)
        for row in reader:
            geturl = {
                '443': lambda :"https://{}".format(row['IP']),
                '8080': lambda :"http://{}:{}".format(row['IP'],row["PORT"]),
                '80': lambda :"http://{}".format(row['IP'])
                }[row["PORT"]]
            urllist.append(geturl())
        return urllist