umpy.ndarray' object has no attribute 'extend'
时间: 2023-09-11 18:08:08 浏览: 43
This error occurs when you try to use the extend() method on a NumPy array object. The extend() method is not supported by NumPy arrays, as they are designed to be fixed in size and shape.
Instead of using extend(), you can use other NumPy methods to concatenate or append arrays. For example, you can use the concatenate() method to join two or more arrays along a given axis. Alternatively, you can use the append() method to add elements to the end of an array.
Here's an example of how to use concatenate() to join two NumPy arrays:
``` python
import numpy as np
a = np.array([1, 2, 3])
b = np.array([4, 5, 6])
c = np.concatenate((a, b))
print(c) # Output: [1 2 3 4 5 6]
```
And here's an example of how to use append() to add an element to an array:
``` python
import numpy as np
a = np.array([1, 2, 3])
b = np.append(a, 4)
print(b) # Output: [1 2 3 4]
```