plotting, debug

Question

import numpy as np
import numpy_financial as npf
import matplotlib.pyplot as plt
#price for 2018-2021
year=[2018,2019,2020,2021]
bitcoin = [3869.47,7188.46,22203.31,29391.78]
pv=1000
coin= bitcoin[0]/pv
newvalue= coin*bitcoin
plt.plot(year,newvalue)
plt.savefig("plot.png")

Answer 1

Change line 9
From
newvalue = coin*bitcoin
To
newvalue= np.asarray(coin)*bitcoin

//Reason
using the * operator on a list is the problem here so convert the list to numpy array