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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def progress(status_code):
 """Translate PROGRESS status codes from GnuPG to messages."""

    lookup = {
        'pk_dsa': 'DSA key generation',
        'pk_elg': 'Elgamal key generation',
        'primegen': 'Prime generation',
        'need_entropy': 'Waiting for new entropy in the RNG',
        'tick': 'Generic tick without any special meaning - still working.',
        'starting_agent': 'A gpg-agent was started.',
        'learncard': 'gpg-agent or gpgsm is learning the smartcard data.',
        'card_busy': 'A smartcard is still working.' }
    for key, value in lookup.items():
        if str(status_code) == key:
            return value