Newbie question about pkg_add

[Canhua]

On Wed, Oct 29, 2008 at 9:18 PM, Thiago R. Santos <thiago528 at gmail.com> wrote:
> On Wed, 2008-10-29 at 11:14 +0800, Canhua wrote:
>> Hi, good day all. I am new to FreeBSD.
>> I tried to pkg_add -r a package (py-networkx), which tell me that:
>> Error: FTP Unable to get ftp://ftp.freebsd.org/pub/
>> FreeBSD/ports/i386/packages-7.0-release/Latest/py-networkx.tbz:
>> File unavailable (e.g., file not found, no access)
>>
>> although I know that py-network does exist in /usr/ports.
>> Actually I could go to /usr/ports/math/py-networkx and make install
>> using ports means.
>>
>> Then I could learn from this that there are softwares that could be
>> install from ports while not able to be added from package system?
>> Am I right?
>
> The package name of this port is 'py25-networkx'. You can use the
> Freshports.org search to find the package names.

Wonderful place~ thank you

However I could not pkg_add py25-networkx still, being told that
      pkg_add: unable to fetch
'ftp://ftp.freebsd.org/pub/FreeBSD/ports/i386/packages-7.0-release/Latest/py25-networkx.tbz'
by URL