inputProcessor

 1#!/usr/bin/env python3
 2"""Input processing functions for triangle program."""
 3
 4import math
 5from decimal import Decimal
 6
 7
 8def sideLength(point1, point2):
 9    """Side lenght.
10
11    Distance between point1 and point2 with
12    coordinates x (index 0) and y (index 1).
13
14    :return: Lenght of side.
15    """
16    return round(Decimal(math.dist(point1, point2)), 10)
17#    vector = (point2[0] - point1[0], point2[1] - point1[1])
18#    return (vector[0] ** 2 + vector[1] ** 2) ** 0.5
19
20
21def inputPoint(point, coordNames=["x", "y"], debug=False):
22    """Input coordinates.
23
24    Ask user to input coordinates of one point.
25    Function support multi-dimension space based on cordNames provided.
26    User is asked to import point coordinates one by one and checks,
27    if inputed coordinate is valid number. If not, it lets user to input
28    coordinate again up to 3 times. Then, if input is not coorect, program
29    is exited with exit code 1.
30
31    :return: List of coordinates entered to console.
32    """
33    coords = []
34    for coordName in coordNames:
35        nok = True
36        retries = 0
37        while nok:
38            try:
39                print(f"Please input point {point}, "
40                      f"coordinate {coordName}: ", end="")
41                coords.append(float(input()))
42                nok = False
43            except Exception as e:
44                print(e) if debug else None
45                if retries < 2:
46                    print("Wrong input! Try again...")
47                    retries += 1
48                else:
49                    print("Retry limit exceeded, exiting...")
50                    exit(1)
51    return coords
52
53
54def getPoints(args, debug=False):
55    """List of points.
56
57    Coordinates are parsed from provided command line arguments
58    list (args) or interactively inputed to console by user.
59
60    :return: List of 3 points with 2 coordinates each.
61    """
62    try:
63        points = [
64            [float(args[1]), float(args[2])],
65            [float(args[3]), float(args[4])],
66            [float(args[5]), float(args[6])],
67        ]
68    except (ValueError, IndexError) as e:
69        print("Failed to process provided arguments or no arguments given.")
70        print(f"Reason: {e}") if debug else None
71        print("Please enter points now.")
72        points = [
73            inputPoint("A", debug=debug),
74            inputPoint("B", debug=debug),
75            inputPoint("C", debug=debug),
76        ]
77    return points
78
79
80def getSides(args, debug=False):
81    """:return: List of lengths of the 3 sides of a triangle."""
82    points = getPoints(args, debug)
83
84    # Points
85    print(f"\nDebug: Points are {points[0]} {points[1]}"
86          f"{points[2]}\n") if debug else None
87
88    # Side length
89    sides = []
90    sides.append(sideLength(points[0], points[1]))
91    sides.append(sideLength(points[1], points[2]))
92    sides.append(sideLength(points[2], points[0]))
93
94    return sides