你不需要正则表达式。基于分隔符拆分字符串并提取要分配给所需变量的项:
s = "GET /phpmyadmin HTTP/1.1"
method, [localhost, protocol], version = [(x.strip(), y.split(), z) for x, y, z in [s.split('/')]][0]
更具可读性的方式:
for x, y, z in [s.split('/')]:
method = x.strip()
localhost, protocol = y.split()
version = z