Bar chart in pylab from a dictionary

Question

I have been reading up about this. And I have been unable to find how the data for a histogram is mapped. The way I understand it:

A bar chart has a name and a value for each bin.

This seems to be a pretty simple and intuitive way to look at it. I searched around and found this question: python: creating histogram out of dictionary

Which seemed to be a long way from what I am asking.

I have the following dictionary:

d = {'CLOVER':4,'SPADE':6,'DIAMOND':7,'HEART':2}

And I want to create a bar chart with this dictionary. The numbers will get bigger. But the number of bins will remain four.

I am doing this as a project. We are doing this kinda thing with different implementations and then checking how random(pseudo-random technically) each implementation is. And then we need to submit a report. Which we will construct together.

please help me with the code. And also some examples.

specs

Python 2.7
Tkinter 8.5
Pylab

Answer 1

I have tried this and get a similiar histogram:

import pylab as pl
import numpy as np

d = {'CLOVER':4,'SPADE':6,'DIAMOND':7,'HEART':2}
X = np.arange(len(d))
pl.bar(X, d.values(), align='center', width=0.5)
pl.xticks(X, d.keys())
ymax = max(d.values()) + 1
pl.ylim(0, ymax)
pl.show()

It is not the same but similiar. If you want to modify the color, the width or etc, just refer to http://matplotlib.org/api/pyplot_api.html.