要阅读numpy.array
从 csv 文件中,您可以提供一个转换器函数pandas.read_csv
.
Code:
import ast
import numpy as np
def from_np_array(array_string):
array_string = ','.join(array_string.replace('[ ', '[').split())
return np.array(ast.literal_eval(array_string))
测试代码:
import numpy as np
import pandas as pd
image = np.array([[0.1, 0.2], [0.3, 0.4]])
df = pd.DataFrame(
[['image name1', image],
['image name2', image],
],
columns=['names', 'images']).set_index('names')
print(df)
df.to_csv('sample.csv')
df2 = pd.read_csv('sample.csv', converters={'images': from_np_array})
print(df2)
Results:
images
names
image name1 [[0.1, 0.2], [0.3, 0.4]]
image name2 [[0.1, 0.2], [0.3, 0.4]]
names images
0 image name1 [[0.1, 0.2], [0.3, 0.4]]
1 image name2 [[0.1, 0.2], [0.3, 0.4]]