helpers.py

## Helper functions for Implementation Assignment 1
import math
import decimal

def main():
    pointOne = "45678 709\n"
    pointTwo = "78 56911\n"
    print("distance = ")
    # computes distance between any 2 points in the given .txt format
    print(point_dist(pointOne, pointTwo))
    print()
    print("x1 = ")
    print(get_x(pointOne))
    print()
    print("y1 = ")
    print(get_y(pointOne))
    print()
    print("x diff = ")
    print(x_diff(pointOne, pointTwo))
    print()
    print("y diff = ")
    print(y_diff(pointOne, pointTwo))

decimal.getcontext()

def point_dist(pt1, pt2):
    p1 = pt1
    p2 = pt2
    try:
        x1 = int(p1[0])
        y1 = int(p1[1])
        x2 = int(p2[0])
        y2 = int(p2[1])
    except ValueError:
        print("Type mismatch")
        return(0)
    # print math.sqrt((x1 - x2) ** 2 + (y1 - y2) ** 2)

    # print decimal.getcontext()
    # print decimal.getcontext()

    dist = decimal.Decimal(math.sqrt((x1 - x2) ** 2 + (y1 - y2) ** 2))
    # dist = math.sqrt((x1 - x2) ** 2 + (y1 - y2) ** 2)
    output = round(dist, 4)
    # dist.prec = 3
    # decimal.getcontext().prec = 2
    # print "Dist: ", output
    return output


# return the x coordinate of a string point
def get_x(pt):
    return int(pt.split(' ')[0])


# return the y coordinate of a string point
def get_y(pt):
    return int(pt.split(' ')[1])


# find the absolute x difference between 2 string points
def x_diff(pt1, pt2):
    p1_x = int(pt1.split(' ')[0])
    p2_x = int(pt2.split(' ')[0])
    return abs(p1_x - p2_x)


# find the absolute y difference between 2 string points
def y_diff(pt1, pt2):
    p1_y = int(pt1.split(' ')[1])
    p2_y = int(pt2.split(' ')[1])
    return abs(p1_y - p2_y)