Skip to content

Tag: python

Python pandas group non repeating values

Hi I have a data frame which looks like this I would like to groupby and sum for non repeating values in col1 for e.g. Is there any way I can do this via pandas functions? Answer IIUC, you could create groups using groupby + cumcount (where the nth occurrences of each col1 value will be grouped the same); the…

Randomly Generate bitstrings with fixed sum

I would like to generate a set of randomly generated bit strings with a certain length N, but I would like to ensure that the sum of each bit string adds up to a certain number, say $k$. How would I go about doing this in Python without generating all possible bit strings and removing ones that don’t ad…

Is the stack frame to this code missing or not?

Based on what I know. When a function is called, a stack frame should be created which tracks all names and bindings within the functions. The screenshot and code are from 《Introduction to Computation and Programming Using Python》offered by MIT 6.0001. The 7 columns are well understood. In the last line of th…