parameters: (self, address, callback)
docstring: SMTP 'expn' command -- expands a mailing list.
docstring_summary: SMTP 'expn' command -- expands a mailing list.
docstring_tokens: SMTP expn command -- expands a mailing list .
function: def expn(self, address, callback):
          """SMTP 'expn' command -- expands a mailing list."""
          self.putcmd("expn", quoteaddr(address), partial(self.getreply, callback=callback))
function_tokens: def expn ( self , address , callback ) : self . putcmd ( "expn" , quoteaddr ( address ) , partial ( self . getreply , callback = callback ) )