字典未在for循环中分配正确的值

Question

我在Numpy数组中有2列数据，我想从值对中创建字典。数据看起来像这样-

[[0.000e+00 1.510e+02] 
 [1.000e+00 1.410e+02]
 [2.000e+00 1.490e+02]
 ...
 [2.238e+03 1.580e+02]
 [2.239e+03 1.520e+02]
 [2.240e+03 1.620e+02]]

代码为：

data = np.loadtxt('neon_spectrum.txt', delimiter=' ') # Loads data into Numpy array as shown above
neon_dictionary = {}
for (x, y) in data:       
      neon_dictionary[y] = x
print(neon_dictionary)

预期结果：{151.0:0.0, 141.0:1.0, 149.0:2.0 ... 162.0:2240.0} 实际结果（键是正确的，值是垃圾）：{151.0:265.0, 141.0:539.0, ...}

无错误消息。我无法弄清楚我在词典分配中犯了什么错误。谢谢。