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up vote 5 down vote favorite
1

I've installed Enthought's EPD (64 bit for Windows 7).

I'm trying to plot historical stock quote data using Yahoo's API. All the code I'm trying to use is on this blog post: http://www.traineetrader.com/importing-stock-data-from-yahoo-using-python/

The ystockquote.py file works fine.

But the second script to plot Google's historical stock quote doesn't work for me. This is the code (from the website):

import ystockquote

# Get Quotes 01/01/2006 - 01/01/2009
GOOG = ystockquote.get_historical_prices('GOOG', '20060101', '20090101')

# Create empty lists, quick and dirty
GOOGOpen = [ ]
GOOGClose = [ ]
GOOGDate = [ ]
GOOGHigh = [ ]
GOOGLow = [ ]
GOOGAdj = [ ]
GOOGVolume = [ ]

# Populate lists from downloaded data
for i in range(1, 755):
    GOOGDate.append(GOOG[i][0])
    GOOGOpen.append(GOOG[i][1])
    GOOGHigh.append(GOOG[i][2])
    GOOGLow.append(GOOG[i][3])
    GOOGClose.append(GOOG[i][4])
    GOOGVolume.append(GOOG[i][5])
    GOOGAdj.append(GOOG[i][6])

plot(GOOGAdj)
title("Google Adjusted Close")
ylabel(r"GOOG Closing Price ($USD)", fontsize = 12)
xlabel(r"Date", fontsize = 12)
grid(True)

I get the following error:

NameError: name 'plot' is not defined

Any tips on what I'm doing wrong? Or how to get this to run? If I include "from pylab import *" at the top of the code, I don't get the error, but nothing happens.

share|improve this question
    
I should note that I'm running this script from the PyLab interpreter. –  Flux Capacitor Oct 17 '11 at 3:53
2  
N.B. If you start ipython --pylab, it loads the pylab stuff automatically, and also uses some tricks so the console doesn't block when plot windows are open. –  Thomas K Oct 18 '11 at 12:16

1 Answer 1

up vote 7 down vote accepted

In addition to adding from pylab import *, you need to add show() after the last line of the script (i.e., after grid(True)) in your question to actually display the plot.

Here is what I get after adding show():

Google Adjusted Close

share|improve this answer
    
The figure, of course, matches the figure in the blog post linked to in the question. –  David Alber Oct 17 '11 at 4:26
    
Ah! That works for me too. Thanks very much. –  Flux Capacitor Oct 17 '11 at 4:44

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