<｜begin▁of▁sentence｜>### Instruction:
Assuming you have a `Histogram` class with an `add` method that takes a number and a repeat parameter, how can you record a single value or multiple occurrences of a value in this histogram data structure, and then visualize it?
### Response:
from matplotlib import pyplot as plt
import numpy as np

# Assuming Histogram is a custom class we have that contains a 'add' method

class Histogram:
    def __init__(self):
        self.data = []

    def add(self, num, repeat=1):
        self.data.extend([num] * repeat)

    def plot(self):
        plt.hist(self.data, bins=10)
        plt.show()

# Example usage:

# Create a histogram instance
hist = Histogram()

# Add a single number to the histogram
hist.add(5)

# Add a number, repeating it 3 times
hist.add(7, repeat=3)

# Plot the histogram
hist.plot()
<|EOT|>
