'Sets the PEP number. For example, if the PEP is identified as PEP 0008,
it will be stored as 8. If the PEP is identified as PEP 0143 it will be
stored as 143.'

def set_pep_number(self):

    pep = re.findall('\\d+', self.url)[0]
    self.pep = pep.lstrip('0')
