from scipy.stats import chi2_contingency as chi2
import numpy as np

obs = np.array([[2887.0, 459.0], [61.0, 383.0]])
chi,p,dof,expected = chi2(obs)
print("%f, %e, %f" % (chi, p, dof))

'''
survive:
chi = 1189.53, p = 1.149752e-260

survive:
chi = 611.59, p = 5.031232e-135

'''