parser_1.py

def PARSER(filename):
    print(filename)
    with open(str(filename), "r") as f:

        # READ_FILE
        content  = f.read().splitlines()

        #REMOVE EMPTY ARRAY
        content = [i for i in content if i] 
        #IN 2-D ARRAY
        for i in range (len(content)):
            content[i]=content[i].split()
        content.pop(0)

        #NODE_COUNT
        no_of_nodes = int(content[0][0])

        #NODE _ X _ Y in one ARRAY 
        node_x_y = [None]*(no_of_nodes)
        for i in range (1,no_of_nodes+1):
            node_x_y[i-1] = content[i]
        from_to_cost = []
        for i in range (no_of_nodes+1,len(content)-1):
            j=1
            while j < len(content[i]):
                temp = [None]*3
                temp[0] = i - no_of_nodes - 1
                temp[1] = int(content[i][j])
                j=j+2
                temp[2] = int(float(content[i][j]))/10000000
                j=j+2
                from_to_cost.append(temp)
        source = int(content[len(content)-1][0])

    # print(no_of_nodes)
    # print(node_x_y)
    # print(from_to_cost)
    # print(source)
    # print(matrix)
    return node_x_y , from_to_cost , no_of_nodes , source
# PARSER()