<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def objectsFromPEM(pemdata):
 """ Load some objects from a PEM. """

    certificates = []
    keys = []
    blobs = [b""]
    for line in pemdata.split(b"\n"):
        if line.startswith(b'-----BEGIN'):
            if b'CERTIFICATE' in line:
                blobs = certificates
            else:
                blobs = keys
            blobs.append(b'')
        blobs[-1] += line
        blobs[-1] += b'\n'
    keys = [KeyPair.load(key, FILETYPE_PEM) for key in keys]
    certificates = [Certificate.loadPEM(certificate)
                    for certificate in certificates]
    return PEMObjects(keys=keys, certificates=certificates)