''' Purpose: practice getting data from a useful dataset
'''

# define the base folder for course csv datasets
CSV_WEB_FOLDER = "http://www.cs.virginia.edu/~cs1112/datasets/csv/"

import url

# get name of the dataset
reply = input( "Enter name of dataset: " )

print()

# clean up the reply to get file name
file_name = reply.strip()

# get url link for dataset
link = CSV_WEB_FOLDER + file_name

# get contents of web resource
text = url.get_contents( link )

# clean-up the text
text = text.strip() 

# turn the text into data; i.e., a list of lines
lines = text.split( "\n" )

# get csv rows into dataset form
dataset = []

for line in lines :
    # clean up the line
    line = line.strip()

    # split the line to cells
    cells = line.split(',')

    # add the cells to a new row
    row = []
    
    for cell in cells :
        # clean up the cell
        cell = cell.strip()

        # add the cell to the row
        row.append( cell )

    # add the row to dataset
    dataset.append( row )

# decompose dataset into header and data
header = dataset[ 0 ]
data   = dataset[ 1 : ]

# print the header
print( "header:" )
print( header )

print()

# print the dataset data
print( "data:" )

for row in dataset :
    print( row )