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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 morrison_and_stephenson_2004_table():
 """Table of smoothed Delta T values from Morrison and Stephenson, 2004."""

    import pandas as pd
    f = load.open('http://eclipse.gsfc.nasa.gov/SEcat5/deltat.html')
    tables = pd.read_html(f.read())
    df = tables[0]
    return pd.DataFrame({'year': df[0], 'delta_t': df[1]})