%pylab inline
import matplotlib.pyplot as plt

import pandas as pd
df = pd.DataFrame.from_items([('A', [1, 2, 3]), ('B', [4, 5, 6])])

class side_by_side():
    def __init__(self, *frames):
        self.frames = frames

    def _repr_html_(self):
        width = 100. / len(self.frames)

        s = ""
        for f in self.frames:
            s += "<div style='float: left;'>%s</div>" % f._repr_html_()

        return s

side_by_side(df, df)