float转换为bytearray，bytearray转换为float

Question

import numpy as np 

Array = np.arange(0, 100.1, 0.1)
print(Array)

np.savetxt('1-100.txt', Array, fmt='%f') # 텍스트파일로 저장 

np.loadtxt('1-100.txt') 

array = np.loadtxt('1-100.txt') 
print(array)

data_array = []

for data in array:
  data_array.append(data)
  
import struct

byte_array = []
for data2 in data_array :
    byte_array.append(struct.pack('f',data2))
    
print(byte_array)
    
    

np.save('1-100npy',byte_array)

np.load('1-100npy.npy')

array2 = np.load('1-100npy.npy')

byte_array2 = []
for data3 in array2 :
    byte_array2.append(data3)




float_array = []
for data4 in byte_array2:
    float_array.append(struct.unpack('f',data4))



np.savetxt('1-100 2.txt',float_array, fmt = "%f'")

我想知道

float_array = []
for data4 in byte_array2:
    float_array.append(struct.unpack('f',data4))

error: unpack requires a buffer of 4 bytes <- because of that

Answer 1

"np.save func“按字面意思将值”b‘\x00\x00’“保存为空。

检查"1-100npy.npy"，你可以看到。

若要避免该错误，请在byte_array2中传递第一项

for data4 in byte_array2[1:]:
    float_array.append(struct.unpack('f',data4)[0])