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I want to replace DF1.index.values with DF2[some_column].values HOWEVER i only want to replace if D… Read more Replace Df Index Values With Values From A List But Ignore Empty Strings

how would I delete all rows from a dataframe that come after a certain fulfilled condition? As an e… Read more Keep Upper N Rows Of A Pandas Dataframe Based On Condition

I'm searching for an efficient way to create a matrix of occurrences from two arrays that conta… Read more Fill Matrix Of Occurences From Column/row Arrays Of Indexes

Say I have a list of lists of lists etc... of some depth: ExampleNestedObject = numpy.ones(shape = … Read more Store Slice Index As Object

In order to get the index corresponding to the '99' value in a numpy array, we do : mynumpy… Read more Retrieve Indexes Of Multiple Values With Numpy In A Vectorization Way

I have a dataframe, produced by this piece of code: import pandas as pd import datetime as dt data… Read more Perform Calculation Between Rows With Datetime Index And Place Them Into New Columns

I want to get the indexposition of a sublist in a nested list, e.g 0 for [1,2] in nested_ls = [[1,2… Read more Most Efficient Way To Get Indexposition Of A Sublist In A Nested List

This is a possibly silly question, but looking at the mapping of operators to functions I noticed t… Read more Python Operator, No Operator For "not In"

I am trying to understand numpy's combined slicing and indexing concept, however I am not sure … Read more How To Understand Numpy's Combined Slicing And Indexing Example

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

I want to be able to interleave two lists that could potentially be unequal in length. What I have … Read more Interleaving 2 Lists Of Unequal Lengths

I am trying to write a function that calculates how much the biggest dip was in each array. the fun… Read more Calculating The Drawdown Within A Numpy Array Python

I have a numpy array like this: a = [0,88,26,3,48,85,65,16,97,83,91] How can I get the values at c… Read more Python: How To Get Values Of An Array At Certain Index Positions?

I have a dataframe df df Name 0 A 1 A 2 B 3 B 4 C 5 D 6 E 7 F 8 G 9 H How ca… Read more Renaming Pandas Dataframe Indeces Using Index And Column Values

I was trying to extract even lines from a text file and output to a new file. But with my codes pyt… Read more "list Index Out Of Range" When Try To Output Lines From A Text File Using Python

Is there any way that i can access the items of nested list ? # Here a is the nested list a = [1,… Read more How To Access The Nested List Items In Python With Out Creating A New List?

Suppose I have an pandas series that I'd like to function as a multimap (multiple values for ea… Read more Indexed Lookup On Pandas Dataframe. Why So Slow? How To Speed Up?

I have the following data frame: import pandas as pd # Create DataFrame df = pd.DataFrame( {'i… Read more How To Sort Pandas Dataframe By Custom Order On String Index

In numpy, with two arrays of the same shape, x and y, it is possible to do slices like this y[x >… Read more Tensorflow Indexing With Boolean Tensor

I have one dataframe in which I need to do comparison with Date column with conditions and need to … Read more How To Get Index Number Of Rows With Condition In Pandas