python - Add density curve on the histogram

Question

I am able to make histogram in python but I am unable to add density curve , I see many code which are using different ways to add density curve on histogram but I am not sure how to get on my code

I have added density = true but not able to get density curve on histogram

df = pd.DataFrame(np.random.randn(100, 4), columns=list('ABCD'))
X=df['A']

hist, bins = np.histogram(X, bins=10,density=True)
width = 0.7 * (bins[1] - bins[0])
center = (bins[:-1] + bins[1:]) / 2
plt.bar(center, hist, align='center', width=width)
plt.show()

Answer 1

Pandas also has kde plot:

hist, bins = np.histogram(X, bins=10,density=True)
width = 0.7 * (bins[1] - bins[0])
center = (bins[:-1] + bins[1:]) / 2
plt.bar(center, hist, align='center', width=width, zorder=1)

# density plot
df['A'].plot.kde(zorder=2, color='C1')
plt.show()

Output: