mirrorlib.py 文件源码

def _mirror_list(first):
    '''Generator producing all mirror names'''
    ord_a = ord('a')
    last = socket.gethostbyname_ex('last.pypi.python.org')
    cur_index = ord(first)-ord_a
    cur = first+'.pypi.python.org'
    while True:
        for family, _, _, _, sockaddr in socket.getaddrinfo(cur, 0, 0, socket.SOCK_STREAM):
            yield cur, family, sockaddr
        if last[0] == cur:
            break
        cur_index += 1
        if cur_index < 26:
            # a..z
            cur = chr(ord_a+cur_index)
        elif cur_index > 701:
            raise ValueError, 'too many mirrors'
        else:
            # aa, ab, ... zz
            cur = divmod(cur_index, 26)
            cur = chr(ord_a-1+cur[0])+chr(ord_a+cur[1])
        cur += '.pypi.python.org'