Class list viewer

Class_list_viewer.py

"""
show_student_pix: 

Uses a Western University class list file (typically named .rcl
but really .csv) and the accompanying set of jpg student ID 
pictures to display a few random pictures/names at a time.

Designed for use in IPython notebook.

2014-08-28, P. Barmby
License: CC-BY

Usage:
classlist = pandas.read_csv('ASTRONOM9099ALEC001.rcl',usecols=[8,9,10,12,13],names=['ID', 'Last','First','Prog','email'])
show_student_pix(classlist,3)

"""
import pandas
import numpy.random as npr
import os
from IPython.display import Image, display

def show_student_pix(classlist, nstd):
    class_size = len(classlist)
    for j in range(0,nstd):
        rands=npr.randint(0,class_size)    
        picfile = 'P%9d.jpg'% classlist.ix[rands]['ID']
        if os.path.isfile(picfile):
            i = Image(filename=picfile)
            display(i)
            print classlist.ix[rands]['First'],classlist.ix[rands]['Last']
    return