bridge-test.py

from bridges.bridges import *
from bridges.sl_element import *
import sys
from BRIDGES_API import BRIDGES_API
from BRIDGES_API import USERNAME


#
# This tutorial creates a set of singly linked list elements, links them 
# and displays them
#
# Reference: SLelement, Bridges classes
#

def main():

    # create the Bridges object, set credentials
    bridges = Bridges(3, USERNAME, BRIDGES_API)

    # set title, description
    bridges.set_title("A Singly Linked List Example")
    bridges.set_description("A singly linked list of 4 nodes with names; the nodes in this example use string as the generic type")

	# create the list elements
    st0 = SLelement(e="Gretel Chaney")
    st1 = SLelement(e="Lamont Kyler")
    st2 = SLelement(e="Gladys Serino")
    st3 = SLelement(e="Karol Soderman")
    st4 = SLelement(e="Starr McGinn")
    st5 = SLelement(e="Xavier Rogers")

    # link the elements
    st0.next = st1
    st1.next = st2
    st2.next = st3
    st3.next = st4
    st4.next = st5

    # we want to see these names in the visualization so we will 
    #set them as the nodes' labels. We will retrieve the nodes' 
    #generic data for the label
    st0.label = st0.value
    st1.label = st1.value
    st2.label = st2.value
    st3.label = st3.value
    st4.label = st4.value
    st5.label = st5.value
    
    
    #* Using a regular for loop on BRIDGES elements 
    print('\nUsing a regular while loop.\n')
    el = st0
    while el != None:
        print(el.value)
        el = el.next
    
    print('\nUsing a list iterator. \n')
    list_iter = SLelementIterator(st0)
    i = 0
    st = st0
    while list_iter.has_next():
        print(st.value)
        st = list_iter.next()
        i+=1
        
        

    # tell Bridges the head of the list
    bridges.set_data_structure(st0)

    # visualize 
    bridges.visualize()


if __name__ == "__main__":
    main()