import numpy as np
import matplotlib.pyplot as plt

x = np.linspace(-3, 3, 121)
y = np.sinc(x)

data_xlim = (float(x.min()), float(x.max()))
data_ylim = (float(y.min()), float(y.max()))

print(f"data_xlim=({data_xlim[0]:.1f}, {data_xlim[1]:.1f})")
print(f"data_ylim=({data_ylim[0]:.4f}, {data_ylim[1]:.4f})")