DagnyTagg2013

# 2D Matrix Ops
import sys
from functools import partial

# SLICING
"""
=> operates on SHALLOW REFERENCE PTR to COMPLEX types (like list, array); 
                    OR actual VALUES of PRIMITIVE types (like char, int)
- https://www.python-course.eu/deep_copy.php
a[start:end] # items start through end-1 (ie NOT inclusive of END)

DagnyTagg2013

# calculate 1D stats on data

data = [10, 2, 38, 23, 21, 5, 38, 23]

# sum
dataSum = sum (data)
print ('sum is:  {}'.format(dataSum))

# COUNT 
count = len (data)

DagnyTagg2013

"""

PROBLEM:

  4-digit number:  2284
  - assume have dictionary isWord(String word)
  - assume have phonenum pad digit to set of letters
  - print all possible words of ANY length up to 4-digits 
  
  eg 2->A,B,C   

DagnyTagg2013

# Build an N-Tree from 2D array of Parent-Child pairs

import logging
from collections import deque

"""
   TREE:
            3
          / | \
        4   5  6