<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def loadtoc(self):
 """Load the table of contents into memory."""

        self.toc = self.TOCTMPLT()
        self.lib.seek(self.pkgstart+self.tocpos)
        tocstr = self.lib.read(self.toclen)
        self.toc.frombinary(tocstr)