Working with numpy.diff function, suppose this simple case: How can I get easily x back to original scale not differenced? I suppose there is something with numpy.cumsum(). Answer Concatenate with the first element and then use cumsum – For concatenating, we can also use np.hstack, like so – Or wi…
Tag: python
How to make future calls and wait until complete with Python?
I have the following code where I have a list of usernames and I try and check if the users are in a specific Windows Usergroup using net user domain | find somegroup. The problem is that I run that command for about 8 usergroups per username and it is slow. I would like to send off these calls using
Conversion of string to upper case without inbuilt methods
I am trying to perform conversion from a lowercase to uppercase on a string without using any inbuilt functions (other than ord() and char()). Following the logic presented on a different thread here , I came up with this. However I am getting an error output: TypeError: ord() expected a character, but string…
How can I tell that the page has finished loading?
I’m playing with Chromium’s headless web browser API. Based on chrome_remote_shell source code, I came up with the following code: Here’s example output: I noticed that I get a long stream of messages, last one of them being Network.loadingFinished, but I got this one for multiple requestIds…
Cross validation with grid search returns worse results than default
I’m using scikitlearn in Python to run some basic machine learning models. Using the built in GridSearchCV() function, I determined the “best” parameters for different techniques, yet many of these perform worse than the defaults. I include the default parameters as an option, so I’m s…
Elegant way to check if a nested key exists in a dict?
Is there are more readable way to check if a key buried in a dict exists without checking each level independently? Lets say I need to get this value in a object buried (example taken from Wikidata): To make sure that this does not end with a runtime error it is necessary to either check every level like so: …
Python open jp2 medical images – Scipy, glymur
I am trying to read and tile a jp2 image file. The image is RGB 98176 x 80656 pixels (it is medical image data). When trying to read the image with glymur I get this error: I understand the image is too big. What I need is to read the image data by tiles and save them elsewhere and in
How can I do a dictionary format with f-string in Python 3 .6?
How can I do this format with a Python 3.6 F-String? Answer Well, a quote for the dictionary key is needed. f’My name {person[“name”]} and my age {person[“age”]}’
How to configure PIP per config file to use a proxy (with authentification)?
I used to set up environment evariables http_proxy and https_proxy (with user + password) in the past to use Pip (on Windows) behind a corporate proxy. But recently I needed to tell Pip to use a proxy without setting up environment variables as this conflicted with git configuration in combination with SSL Ce…
problems installing scipy and sklearn
I am quite new into programming and I am struggling much to install scipy with the errors. I did not had any problems installing other libraries: Failed cleaning build dir for scipy and Failed building wheel for scipy With sklearn I am facing the problem : Failed building wheel for scikit-learn just found thi…