import matplotlib.pyplot as plt


def pie_chart():
    numbers = [40, 35, 15, 10]
    labels = ["Python", "Ruby", "C++", "PHP"]
    # Explode the first slice (Python)
    explode = (0.1, 0, 0, 0)
    fig1, ax1 = plt.subplots()
    ax1.pie(
        numbers,
        explode=explode,
        labels=labels,
        shadow=True,
        startangle=90,
        autopct="%1.1f%%",
    )
    ax1.axis("equal")
    plt.show()


if __name__ == "__main__":
    pie_chart()