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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 dt2jd(dt):
 """Convert datetime to julian date """

    a = (14 - dt.month)//12
    y = dt.year + 4800 - a
    m = dt.month + 12*a - 3
    return dt.day + ((153*m + 2)//5) + 365*y + y//4 - y//100 + y//400 - 32045