Convert array and list to each other in Python

1. To convert array to list, use the .tolist ( ) method

import numpy as np

#定义numpy.ndarray
array = np.array([1,2,3])
#输出numpy.ndarray类型
print(type(array))

#numpy.ndarray转为list
list = array.tolist()
#输出list类型
print(type(list))

The output results are:

<class 'numpy.ndarray'>
<class 'list'>

2. List to array, use numpy.array() function

import numpy as np   
    
#定义list
list = [1,2,3]
#输出list类型
print(type(list))

#将list转化为numpy.ndarray
array = np.array(list)
#输出array类型
print(type(array))

The output results are:

<class 'list'>
<class 'numpy.ndarray'>