将numpy数组附加到两个二进制文件中

I want to create two binary files to append numpy arrays into each one of them during a loop. I wrote the following method (I use Python 2.7):

我想创建两个二进制文件,在循环期间将numpy数组附加到每个文件中。我写了以下方法(我使用Python 2.7):

for _ in range(5):
    C = np.random.rand(1, 5)
    r = np.random.rand(1, 5)
    with open("C.bin", "ab") as file1, open("r.bin", "ab") as file2:
        # Append to binary files
        np.array(C).tofile(file1)
        np.array(r).tofile(file2)

# Now printing to check if appending is successful
C = np.load("C.bin")
r = np.load("r.bin")
print (C)
print (r)

However, I keep getting this error:

但是,我一直收到这个错误:

Traceback (most recent call last):
  File "test.py", line 15, in <module>
    C = np.load("C.bin")
  File "/anaconda/lib/python2.7/site-packages/numpy/lib/npyio.py", line 429, in load
    "Failed to interpret file %s as a pickle" % repr(file))
IOError: Failed to interpret file 'C.bin' as a pickle

I tried to fix it but I cannot see anything more. Any help is appreciated.

我试图解决它,但我看不到更多。任何帮助表示赞赏。

NOTE: I intentionally want to use np.load because later on I will be loading the dataset from the disk into a numpy array for further processing.

注意:我故意想使用np.load,因为稍后我会将数据集从磁盘加载到numpy数组中以便进一步处理。

1 个解决方案

#1

You should use the save method that is built in the numpy to store the array in the files. Here what your code should look like:

您应该使用numpy中构建的save方法将数组存储在文件中。这里你的代码应该是这样的:

for _ in range(5):
    C = np.random.rand(1, 5)
    r = np.random.rand(1, 5)

    np.save('C', C)
    np.save('r', r)

    # Now printing to check if appending is successful
    C = np.load("C.npy")
    r = np.load("r.npy")
    print (C)
    print (r)
    del C, r

Please refer to the documentation https://docs.scipy.org/doc/numpy-1.13.0/reference/generated/numpy.load.html

请参阅文档https://docs.scipy.org/doc/numpy-1.13.0/reference/generated/numpy.load.html

#1