如何修复此numpy.concatenate错误？

Question

Imm正在尝试获得如下输出 数组（[0,1,2,3,4,5]），但此错误不断出现。在阅读有关numpy concatenate方法的python文档时，它声称axis=None将首先展平数组，那么我不明白什么

>>> a = np.array([1,2,3,4,5])
>>> b = np.array([0])
>>> b
array([0])
>>> a
array([1, 2, 3, 4, 5])
>>> np.concatenate(b,a,axis=None)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<__array_function__ internals>", line 4, in concatenate
TypeError: concatenate() got multiple values for argument 'axis'
>>>

Answer 1

正在为axis传递多个参数，axis是可选的第二个参数

https://numpy.org/doc/stable/reference/generated/numpy.concatenate.html

numpy.concatenate((a1, a2, ...), axis=0, out=None, dtype=None, casting="same_kind")
Join a sequence of arrays along an existing axis.

您需要像这样调用

np.concatenate((b, a), axis=None)

而不是

np.concatenate(b, a, axis=None)