python制造一个好看的条纹

import numpy  as np

import matplotlib.pyplot as plt

x=np.arange(-50,50)
y=np.cos(x)*np.sin(x)*(1/(1+np.exp(-x)))*(1/(1+np.exp(x)))

plt.plot(x,y)
plt.show()

import numpy  as np

import matplotlib.pyplot as plt

x=np.linspace(-10,10,10000)
y=np.cos(x)*np.sin(x)*(1/(1+np.exp(-x)))*(1/(1+np.exp(x)))

plt.plot(x,y)
plt.show()

```python
import numpy  as np

import matplotlib.pyplot as plt

x=np.linspace(-10,10,10000)
y=np.cos(x)*np.sin(x)*(1/(1+np.exp(-x)))*(1/(1+np.exp(x)))

plt.plot(x,y)
plt.show()