Add an 'exclude' parameter to 'curvipy.Interval'

[dylannalex]

The idea is to exclude a list of values from the interval, so they won't be considered when plotting the curve.

curvipy.Interval:
    Parameters
    ----------
    start : int or float
        Real number in which the interval starts.
    end : int or float
        Real number in which the interval ends.
    samples: int
        Number of values within the interval. The more samples, the more precise the \
        curve plot is.
    exclude: list[int or float]
        List of values that will be excluded from the interval.

Example: imagine we want to plot the curve $f(x) = 1/x$ on the interval $x \in [-a, a]$. Since $f(0)$ is not defined, the current way of doing that is to create two intervals:

import curvipy


def f(x):
    return 1 / x


plotter = curvipy.Plotter()

a = 10
curve = curvipy.Function(f)
interval_one = curvipy.Interval(-a, -0.1, 100)
interval_two = curvipy.Interval(0.1, a, 100)

plotter.plot_curve(curve, interval_one)
plotter.plot_curve(curve, interval_two)
plotter.wait()

With an 'exclude' parameter on 'curvipy.Interval' class, we could accomplish the same goal with only one interval:

import curvipy


def f(x):
    return 1 / x


plotter = curvipy.Plotter()

a = 10
curve = curvipy.Function(f)
interval = curvipy.Interval(-a, a, 200, exclude=[0])

plotter.plot_curve(curve, interval)
plotter.wait()

If somebody wants to work on it, please make a comment. Implementing this is not as easy as it seems and might need modifications in other classes like curvipy.Plotter and/or curvipy.Curve.