python - generate scatter chart and save it to png file using matplotlib pyplot

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import matplotlib.pyplot as plt

# === Chart data preparation ===
x = [
    [-4.        ],
    [-3.11111111],
    [-2.22222222],
    [-1.33333333],
    [-0.44444444],
    [ 0.44444444],
    [ 1.33333333],
    [ 2.22222222],
    [ 3.11111111],
    [ 4.        ]
]
y = [
    [16.        ],
    [ 9.67901235],
    [ 4.9382716 ],
    [ 1.77777778],
    [ 0.19753086],
    [ 0.19753086],
    [ 1.77777778],
    [ 4.9382716 ],
    [ 9.67901235],
    [16.        ]
]

# === Scatter chart generating ===
plt.figure(figsize=(8, 6))
plt.scatter(x, y, c='blue', alpha=0.5)
plt.title("Scatter chart", fontsize=16)
plt.xlabel("x", fontsize=14)
plt.ylabel("y", fontsize=14)
plt.grid(True)
plt.savefig("scatter_chart.png")
plt.close()



# Notes:
#     1) to install Matplotlib Pyplot globally use `pip install --upgrade matplotlib` command.
#     2) to install Matplotlib Pyplot locally use `./.venv/bin/pip install --upgrade matplotlib` command.


# References:
#     1) https://matplotlib.org/stable/install/index.html