Python - matplotlib: plot graph of fincance stock qutoes

I need some utility which can work with any platform, reason in my last blog we discuss on Matlab and Gnuplot, both are good tools but i need very light-weight tool which can work windows as well linux with same code.
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I have most of data reading utility in python, so i needed tool in python. i have chosen the matplotlib module for this task.

we need to import following python modules in our program.

import matplotlib.pyplot as plt
import matplotlib.dates as mdates
from matplotlib.finance import plot_day_summary
import datetime

I have data in dictonary format, you can found my csv datareader code, so i had written following format of code. I like date in YYYYMMDD format because sorting of data based on date is easy.

def plotData(dictdata,numday):
        qut=[]
        if len(dictdata)>0:
            i=0
            for row in dictdata:
                ts=row['timestamp']
                op=row['open']
                hp=row['high']
                lp=row['low']
                cp=row['close']
                qut.append([datetime.datetime.strptime(ts,'%Y%m%d').date(), 
                            float(op),float(cp),float(hp),float(lp)])
                i=i+1
                if i>numday:
                    break
            plotquotes(qut)


def plotquotes(quotes):
    ax = plt.axes()
    ax.xaxis.set_major_formatter(mdates.DateFormatter('%Y%m%d'))
    ax.xaxis.set_major_locator(mdates.WeekdayLocator(mdates.MONDAY))
    ax.xaxis.set_minor_locator(mdates.DayLocator())
    plot_day_summary(ax,quotes)
    ax.xaxis_date()
    ax.autoscale_view()
    plt.setp( plt.gca().get_xticklabels(), rotation=45, horizontalalignment='right')
    plt.show()

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