The mirror hosting the pyasn1 package has been unavailable in the last couple days. Can someone look into this:
Searching for pyasn1
Best match: pyasn1 0.0.9a
error: Can't download http://dfn.dl.sourceforge.net/sourceforge/pyasn1/pyasn1-0.0.9a.tar.gz: 504 Gateway Timeout
NOTE: Tried from several networks.