The post “How can I convert a list of strings into sympy variables?” discusses how to generate SymPy symbols from a list of strings. My question is what steps are needed to use these symbols x, y and z in SymPy calculations? I tried something along the lines but I get the error “NameError: n…
Tag: python
Adding dataclass fields dynamically with dacite.from_dict
I am using dacite to transform a Python dictionary into a dataclass. Is there a way to dynamically add fields to a dataclass? Like in the example below, where the dataclass “Parameters” has defined only one timeseries “timeseriesA”, but there might be additional ones (provided through …
Shuffle rows of a large csv
I want to shuffle this dataset to have a random set. It has 1.6 million rows but the first are 0 and the last 4, so I need pick samples randomly to have more than one class. The actual code prints only class 0 (meaning in just 1 class). I took advice from this platform but doesn’t work. Answer Because
How do you structure python code to avoid long import statements?
example directory structure and code: how would you go about removing the text [inside these square brackets] on the import statements? of course, doing this kind of structure will cause this to not be possible: Answer The simplest is to just use a relative import. For example in utils_one.py you can do You c…
Try to replace the nan values by pandas , but Error: Columns must be same length as key
It is a simple project in Kaggle, just imitating one blog, but failed. enter image description here train_inf[‘Age’]=train_inf.fillna(train_inf[‘Age’].median()) ValueError: Columns must be same length as key just this code I am searching for a long time on net. But no use. Please help …
Flitering django queryset based on ManyToManyField
In my Request model, there is a field requested_to which is a ManyToManyField I want to filter queryset of Request model where a organization_user is not in requested_to Answer You can filter with: Django makes LEFT OUTER JOINs when you filter on a ManyToManyField (or a reverse ForeignKey), so here we exclude…
How can I Iterate through lists, without calling each list individually – in Python
I have the following arrays: And I need to run each array through the following if-else statement: How can I do this without writing an if-else statement for each array? It’s manageable for now, but I plan to have 25 of these arrays, and I feel like there’s a better way. Answer Put all of your vot…
I want to distinguish between true digit and a string digit
I want to check a ‘x’ string whether it is a digit or not in advance. ‘1’ is naturally a digit. But and I will use ① what is calld a string number very much. I don’t know the range of string numbers IDE judges as a digit. ‘①’.isdigit() returns True. ‘⑴’.is…
splitting the data into training and testing in federated learning
I am new in federated learning I am currently experimenting with a model by following the official TFF documentation. But I am stuck with an issue and hope I find some explanation here. I am using my own dataset, the data are distributed in multiple files, each file is a single client (as I am planning to str…
How to format a number from thousands to K style in plotly
I want to change the format of y-axis from thousands to thousands in K format in plotly python. Answer Since you didn’t provide any data, or even explain what you want to show exactly on the y-axis, I will answer with what should work: If you want regularly-spaced tick values for the y-axis, you can eit…