为什么我在制作 plot 时在 Python 中得到“不可散列的类型：‘numpy.ndarray’？

Question

I'm trying to simply make a plot for the equation written below:

import matplotlib.pyplot as plt
import numpy as np

# 100 linearly spaced numbers
x = np.linspace(0,100,100)
y= 1/{np.exp(1/x)+1}

#plot the function
plt.plot(x,y, 'r')

#show the plot
plt.show()

But whenever I use this code, I get the message:

unhashable type: 'numpy.ndarray'

I have searched for the reason for this but the solutions I have seen such as in Python unhashable type: 'numpy.ndarray' , doesn't seem to be the same as mine.

How can I correct this and avoid it happening?

Answer 1

You are using brackets where you should not use it. You need to replace

y= 1/{np.exp(1/x)+1}

by this

y= 1/(np.exp(1/x)+1)