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Home/Questions/Why do I get the typeerror: unhashable type: 'numpy.ndarray' error?
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Gabriel Mary
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Gabriel Mary
Asked: May 11, 20222022-05-11T19:08:03+00:00 2022-05-11T19:08:03+00:00In: Programs

Why do I get the typeerror: unhashable type: ‘numpy.ndarray’ error?

  • 29

How to solve the problem – typeerror: unhashable type: ‘numpy.ndarray’? I have the detail here:

above = range(18000, 18060, 5)
 
 data = np.loadtxt(open('data.txt'), delimiter=None)
 
 energies = (np.hsplit(data, 3))[0]
 
 slice = set(energies)&set(above)

While I run it, I found the warning message:

Traceback (most recent call last):
  File "<pyshell#27>", line 1, in <module>
  set(energies)&set(above)
 TypeError: unhashable type: 'numpy.ndarray

That is my question in my midterm exam, and it is urgent. I searched the solutions on some websites, but I don’t get it. I may miss any line or other changes. I appreciate your assistance!

numpy.ndarray
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    dhtutoria Expert
    2022-06-02T16:33:56+00:00Added an answer on June 2, 2022 at 4:33 pm

    The cause: The variable energies likely have unacceptable shape:

    Solution:

    Instead of writing by your approach:

    >>> data 
    array([[ 1., 2., 3.], 
    [ 3., 4., 5.], 
    [ 5., 6., 7.], 
    [ 8., 9., 10.]]) 
    >>> hsplit(data,3)[0] 
    array([[ 1.], 
    [ 3.], 
    [ 5.], 
    [ 8.]])
     

    Probably you use this way:

    >>> data[:,0] 
    array([ 1., 3., 5., 8.])
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  2. Agathe Andrieu
    2022-05-25T19:29:31+00:00Added an answer on May 25, 2022 at 7:29 pm

    numpy.ndarray can contain any element, e.g. int, float, string etc. If necessary, check the type and convert.

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