OpenCV NoneType object has no attribute shape
It means that somewhere a function which should return a image just returned None and therefore has no shape attribute. Try “print img” to check if your image is None or an actual numpy object.
Python
Python Requests – No connection adapters
You need to include the protocol scheme: Without the http:// part, requests has no idea how to connect to the remote server. Note that the protocol scheme must be all lowercase; if your URL starts with HTTP:// for example, it won’t find the http:// connection adapter either.
ImportError: No module named xgboost
First you need to get control of your python environment. Download the homebrew python by pasting these into a fresh terminal window here you will be prompterd to enter your password. After homebrew is installed, install python with brew install python. Please check your installation with brew doctor and follow homebrew’s suggestions. Now, with a fresh terminal window, install xgboost … Read more
How to add column to numpy array
I think that your problem is that you are expecting np.append to add the column in-place, but what it does, because of how numpy data is stored, is create a copy of the joined arrays so you need to save the output all_data = np.append(…): Alternative ways: I believe that the only difference between these three functions (as … Read more
ImportError: No module named ‘xlrd’
I am currently using PyCharm with Python version 3.4.3 for this particular project. This PyCharm previously had Python2.7, and I upgraded to 3.4.3. I am trying to fetch data from an Excel file using Pandas. Here is my code: When I ran this code, I am getting this error. I searched Stackoverflow and found some … Read more
Scikit-learn GridSearch giving “ValueError: multiclass format is not supported” error
Remove scoring=’roc_auc’ and it will work as roc_auc curve does not support categorical data.
Python – While-Loop until list is empty
Your end criteria must be formulated a little differently: run the loop while there are items and the bucket is positive. or is not the right operation here.
If list index exists, do X
Could it be more useful for you to use the length of the list len(n) to inform your decision rather than checking n[i] for each possible length?
Removing nan values from an array
If you’re using numpy for your arrays, you can also use Equivalently [Thanks to chbrown for the added shorthand] Explanation The inner function, numpy.isnan returns a boolean/logical array which has the value True everywhere that x is not-a-number. As we want the opposite, we use the logical-not operator, ~ to get an array with Trues … Read more
Django reverse lookup of foreign keys
You can use events = venue.event_set to go the other way. Note that venue.event_set is a manager object, like Event.objects, so you can call .all, .filter, .exclude and similar on it to get a queryset. See the Django documentation