adv_ex is already a numpy array, so you can’t call .numpy() again on it (which is a tensor method).
Store adv_ex as a tensor or avoid calling numpy on it:
adv_ex = perturbed_data.squeeze().detach().cpu()
adv_examples.append( (init_pred.item(), final_pred.item(), adv_ex) ) Answer from ptrblck on discuss.pytorch.org
Top answer 1 of 12
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adv_ex is already a numpy array, so you can’t call .numpy() again on it (which is a tensor method).
Store adv_ex as a tensor or avoid calling numpy on it:
adv_ex = perturbed_data.squeeze().detach().cpu()
adv_examples.append( (init_pred.item(), final_pred.item(), adv_ex) )
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Thanks!. My bad, I haven’t noticed that it is already called.
cnt = 0
plt.figure(figsize=(8,10))
for i in range(len(epsilons)):
for j in range(len(examples[i])):
cnt += 1
plt.subplot(len(epsilons),len(examples[0]),cnt)
plt.xticks([], [])
plt.yticks([], [])
…
Stack Overflow
stackoverflow.com › questions › 79277996 › attributeerror-numpy-ndarray-object-has-no-attribute-categories
python - AttributeError: 'numpy.ndarray' object has no attribute 'categories' - Stack Overflow
What I’ve Tried: Switching to loc[pd.notnull(...)]: I confirmed that using X = X.loc[pd.notnull(X[key])] avoids the issue and the merge works correctly. Testing with other filtering methods: Other ways of filtering (like dropna with different columns or without categorical types) do not trigger the error.
AttributeError: 'numpy.ndarray' object has no attribute 'float'
Hi, I’m using dqn for my custom multi-agent env. I can test my evn with trainer and tune, both work without any error. After just a few training iterations, I would like to see the agent’s performance with compute_action. But I get the following error: AttributeError: 'numpy.ndarray' object ... More on discuss.ray.io
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September 19, 2021scikit learn - AttributeError: 'numpy.ndarray' object has no attribute 'fit' - Data Science Stack Exchange
I am relatively new to ML and in the process of learning pipelines. I am creating a pipeline of custom transformers and get this error: AttributeError: 'numpy.ndarray' object has no attribute 'fit'. More on datascience.stackexchange.com
'numpy.ndarray' object has no attribute 'numpy'.
I tried to submit this to the repository linked in your publication, but, apparently, I can't! I received this error while running predictions: Traceback (most recent call last): File "/Us... More on github.com
1
November 16, 2023Medical Data Visualizer AttributeError: 'numpy.ndarray' object has no attribute
I completed the project on google colab and everything seems to be working once I copy it over to replit. The charts seem to look good. However, I’m getting the following 2 errors on test: ====================================================================== ERROR: test_bar_plot_number_of_bars ... More on forum.freecodecamp.org
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May 11, 2023Videos
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Reddit
reddit.com › r/learnpython › error creating numpy v-stack, 'attributeerror: 'numpy.ndarray' object has no attribute 'np'
r/learnpython on Reddit: Error creating numpy v-stack, 'AttributeError: 'numpy.ndarray' object has no attribute 'np'
May 4, 2021 -
Hi,
I'm trying to create a numpy v-stack and creating 3 np.array's for it, by filling them with a loop:
I get the error: 'AttributeError: 'numpy.ndarray' object has no attribute 'np' . I think I'm using the wrong notation to append to the empty arrays:
neighbor_id = [id_ for id_ in range(1, n_obs) if id_ != user_id]
neighbor_id_arr = np.array(neighbor_id)
similarity = np.array([])
num_interactions = np.array([])
# get similarity and num_interactions
for id_ in neighbor_id:
similarity.np.append(np.dot(user_item.loc[user_id],user_item.loc[id_])) #The issue is here, I think
num_interactions.np.append(user_interactions.loc[id_])
c = numpy.vstack((neighbor_id_arr, similarity,num_interactions))
Thanks!
James
Top answer 1 of 2
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I think I'm using the wrong notation to append to the empty arrays: The best way to find out is to read the documentation https://numpy.org/doc/stable/reference/generated/numpy.append.html And yes you are. Numpy arrays don't have an append method, it's a function from the library. And there is no such thing as object.library.function(...) which is what you are doing here similarity.np.append(...) num_interactions.np.append(...) It should be similarity = np.append(similarity, values_to_append) num_interactions = np.append(num_interactions, values_to_append) And should avoid appending data to a numpy array. I'm almost sure there is much better alternative. But since you didn't explain what you are trying to do, I can't help you with that.
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I think you want to use "np.append(arr, values)" instead of arr.np.append(values)". https://numpy.org/doc/stable/reference/generated/numpy.append.html
Top answer 1 of 2
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Hi @arturn
Many thanks for your reply.
I fixed the error. Actually, it was my fault to send observation as a dictionary to the conpute_action method. But, the right datatype is a nparray.
For those who got into the same problem, here is the solution:
policy_id = self.config['multiagent']['policy…
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Hi @deepgravity
This should not happen. RLlib converts the complete content of the input_dict to torch tensors before computing actions.
Can you breakpoint into this function? … or maybe to this line and see what happens there?
Cheers!
GeeksforGeeks
geeksforgeeks.org › how-to-fix-numpy-ndarray-object-has-no-attribute-index
How to Fix: ‘numpy.ndarray’ object has no attribute ‘index’ - GeeksforGeeks
November 28, 2021 - ‘numpy.ndarray’ object has no attribute ‘index’ is an attribute error which indicates that there is no index method or attribute available to use in Numpy array.
Itsourcecode
itsourcecode.com › home › attributeerror: numpy.ndarray object has no attribute values
Attributeerror: numpy.ndarray object has no attribute values
April 4, 2023 - This attributeerror: numpy.ndarray object has no attribute values error occurs when you try to access the “values” attribute of a NumPy ndarray object, but it does not exist.
Top answer 1 of 2
1
It would be helpful if you could post the full stack trace, so that we can see which line your error occurs at. In general, the more information you can provide in a question, the better.
In this case, it looks like your full_model_pipeline may somehow become a numpy array. Since you have a one-element pipeline, you could try changing
full_model_pipeline = Pipeline(steps =[
('full_pipeline',full_pipeline),
('model',LinearRegression())
])
full_model_pipeline.fit(X_train,y_train)
to
model = LinearRegression()
model.fit(X_train, y_train)
2 of 2
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I believe you need to add () where you add scaler to the pipeline: ('std_scaler',StandardScaler) --> ('std_scaler',StandardScaler())
GitHub
github.com › waylandy › phosformer › issues › 1
'numpy.ndarray' object has no attribute 'numpy'. · Issue #1 · waylandy/phosformer
November 16, 2023 - Traceback (most recent call last): File "/Users/joshuasacher/phosformer/wip1_S234.py", line 17, in <module> predictions = Phosformer.predict_many( ^^^^^^^^^^^^^^^^^^^^^^^^ File "/Users/joshuasacher/phosformer/Phosformer/modules.py", line 204, in predict_many return np.array([i['pred'] for i in batch_job(kinases, peptides, **kwargs)]) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/Users/joshuasacher/phosformer/Phosformer/modules.py", line 204, in <listcomp> return np.array([i['pred'] for i in batch_job(kinases, peptides, **kwargs)]) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/Users/joshuasacher/phosformer/Phosformer/modules.py", line 96, in batch_job pred = softmax(result['logits'].cpu(), axis=1)[:,1].numpy() ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ AttributeError: 'numpy.ndarray' object has no attribute 'numpy'.
Author jrsacher
GitHub
github.com › modin-project › modin › issues › 7580
BUG: Conversion of Modin to Pandas causes "AttributeError: 'numpy.ndarray' object has no attribute 'categories'" · Issue #7580 · modin-project/modin
May 23, 2025 - BUG: Conversion of Modin to Pandas causes "AttributeError: 'numpy.ndarray' object has no attribute 'categories'"#7580
Published May 23, 2025
Author Sumukhagc
Career Karma
careerkarma.com › blog › python › python attributeerror: ‘numpy.ndarray’ object has no attribute ‘append’ solution
Python AttributeError: 'numpy.ndarray' object has no attribute 'append' Solution
December 1, 2023 - The AttributeError: ‘numpy.ndarray’ object has no attribute ‘append’ error is caused by using the append() method to add an item to a NumPy array.
Quora
quora.com › Why-do-I-get-numpy-ndarray-object-has-no-attribute-append-error
Why do I get “numpy.ndarray object has no attribute append error”? - Quora
Summary The AttributeError is simply because ndarray has no append method. Choose the appropriate container or numpy function for your use case: list for frequent appends, preallocation for efficiency, or np.append/np.concatenate when copying ...
Neurostars
neurostars.org › community chat
AttributeError: 'numpy.ndarray' object has no attribute 'func' - Community Chat - Neurostars
September 1, 2022 - Hello, I am working on a subject on my local pc I did preprocessing through fmriprep on docker. I used the when I wanted to run import nibabel as nib from nibabel.testing import data_path import numpy as np from nilearn import datasets atlas = datasets.fetch_atlas_msdl() Loading atlas image stored in ‘maps’ atlas_filename = atlas[‘maps’] Loading atlas data stored in ‘labels’ labels = atlas[‘labels’] Load the functional datasets a = nib.load(’/home/roya/outputneww2/sub-1001/ses-01/...
Edureka Community
edureka.co › home › community › categories › python › attributeerror type object numpy ndarray has...
AttributeError type object numpy ndarray has no attribute array function | Edureka Community
April 13, 2020 - Hi Guys, I installed numpy module in my system. But when I tried to import this module ... '__array_function__' How can I solve this error?
Reddit
reddit.com › r/learnpython › python coding help- keep recieving error message"attributeerror: 'numpy.ndarray' object has no attribute 'message_a'"
r/learnpython on Reddit: Python Coding help- keep recieving error message"AttributeError: 'numpy.ndarray' object has no attribute 'MESSAGE_A'"
October 16, 2022 -
https://imgur.com/gallery/yAdAjdx
Hello,
Linked is the screenshot of the two error messages I keep recieving as well as the code leading up to it. I'm trying to run an uplift on a classification tree. Any help is appreciated, I am still fairly new to python. Thank you!!
Top answer 1 of 5
9
You should not be accessing dataframe columns with the dot notation. This is one of the reasons why. Use uplift_df['MESSAGE_A'].
2 of 5
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I'm not familiar with your use case, but are you expecting MESSAGE_A to exist for any particular reason? I can't find documentation of it. Can you link to the tutorial or reference page that told you it exists?
MNE Forum
mne.discourse.group › support & discussions
AttributeError: 'numpy.ndarray' object has no attribute 'get' - Support & Discussions - MNE Forum
May 17, 2021 - MNE-Python version: 0.23.0 operating system: Ubuntu 18.04.5 LTS -IDE: Pycharm-community import matplotlib import matplotlib.pyplot as plt import mne import numpy matplotlib.use('Qt5Agg') mne.set_log_level('warning') # Load raw data data_path = '/MNE/BrainVision/3.vhdr' raw = mne.io.read_raw_brainvision(data_path, preload=True, verbose=False) raw.info['line_freq'] = 50.
Top answer 1 of 2
27
The solution:
The given dataset was already an array, so I didn’t need to call .values.
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The problem lies in the following line:
df = StandardScaler().fit_transform(df)
It returns a NumPy array (see the documentation), which does not have a drop function. You would have to convert it into a pd.DataFrame first!
new_df = pd.DataFrame(StandardScaler().fit_transform(df), columns=df.columns, index=df.index)
Brainly
brainly.com › computers and technology › high school › how can you fix the attributeerror: 'numpy.ndarray' object has no attribute 'append'?
[FREE] How can you fix the AttributeError: 'numpy.ndarray' object has no attribute 'append'? - brainly.com
November 19, 2023 - To fix the 'AttributeError: 'numpy.ndarray' object has no attribute 'append'', use the 'numpy.append()' function instead of the 'append' method. NumPy arrays do not support the 'append' method as their size is fixed.
GeeksforGeeks
geeksforgeeks.org › python › how-to-fix-numpy-ndarray-object-has-no-attribute-append
How to Fix: ‘numpy.ndarray’ object has no attribute ‘append’ - GeeksforGeeks
November 28, 2021 - In the above output, we can see that the python list has a data type of list. When we perform the append operation, the item i.e., 5 gets appended to the end of the list `pylist`. While we try the same method for the NumPy array, it fails and throws an error "AttributeError: 'numpy.ndarray' object has no attribute 'append'".
Statology
statology.org › home › how to fix: ‘numpy.ndarray’ object has no attribute ‘index’
How to Fix: 'numpy.ndarray' object has no attribute 'index'
September 17, 2021 - This error occurs when you attempt to use the index() function on a NumPy array, which does not have an index attribute available to use.