Python Manual

Scenario. Assume a pd.DataFrame, loaded from an external source where one row is a line from a se… Read more Pandas `groupby.aggregate` On `df.index.duplicated()`

I'd like to find the index of the first occurrence of any “special” character in a string, like… Read more How To Find The First Index Of Any Of A Set Of Characters In A String

Say I have a matrix of shape (N,d) and a vector of size N which says which column in the matrix is … Read more How Can I Create A Vector From A Matrix Using Specified Colums From Each Row Without Looping In Python?

I'm working with a large data frame and I'm struggling to find an efficient way to eliminat… Read more Fastest Way To Eliminate Specific Dates From Pandas Dataframe

First off, here is a sample of my data, a csv with Year, Julian Day, 2400hr, and then 2 value colum… Read more Create An Indexed Datetime From Date/time Info In 3 Columns Using Pandas

I have two string arrays each with three columns.I want to compare first two columns of both 2-d a… Read more How To Compare 2 Columns Of A 2d Array At A Time With Columns Of Another Array In Python

I have this code to check indexes in a file to see if they match, but to start off I am having trou… Read more How To Create A List To Select Index?

I have a dataframe that looks something like this: df Name date season binary Apple … Read more Reindex Pandas Dataframe Based On Uneven Dates And Then Groupby And Blank Fill Certain Values