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Showing posts with the label Indexing

Where Does Whoosh (python) Physically Store The Indexed Content?

I am beginning to research on content indexing implementation, and was having a look at Whoosh (htt… Read more Where Does Whoosh (python) Physically Store The Indexed Content?

Numpy Indexing: Broadcasting With Boolean Arrays

Related to this question, I came across an indexing behaviour via Boolean arrays and broadcasting I… Read more Numpy Indexing: Broadcasting With Boolean Arrays

Create An Indexed Datetime From Date/time Info In 3 Columns Using Pandas

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

How To Get All Indices Of Numpy Array, But Not In A Format Provided By Np.indices()

I would like to get all indices of 3x2 array using a NumPy function, produced in the same format, a… Read more How To Get All Indices Of Numpy Array, But Not In A Format Provided By Np.indices()

How To Modify A Single Value Of A 2d Tensor Programatically By Index

I have a 2D tensor my_tensor size [50,50] and dtype int32 and I need to increment the value at one … Read more How To Modify A Single Value Of A 2d Tensor Programatically By Index

Search A List For Item(s)and Return X Number Of Surrounding Items In Python

I want to search a list for the occurence of a value (x) and return that value and a number, say 2,… Read more Search A List For Item(s)and Return X Number Of Surrounding Items In Python

How To Compare 2 Columns Of A 2d Array At A Time With Columns Of Another Array In Python

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

Beginner Python List Complehension, Look Up Index

I have the following code, and I would like the index position of all the 1's: mylist = ['… Read more Beginner Python List Complehension, Look Up Index

Calculating Year Over Year Growth By Group In Pandas

I have the following dataframe: In [1]: df Out[1]: ID Month Transaction_Amou… Read more Calculating Year Over Year Growth By Group In Pandas

How To Access The Nested List Items In Python With Out Creating A New List?

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?

"indexerror: Too Many Indices" In Numpy Python

I know many people asked this question, but I could not get an appropriate answer that can solve my… Read more "indexerror: Too Many Indices" In Numpy Python

What's The Difference When Indexing A Numpy Array Between Using An Integer And A Numpy Scalar?

I didn't expect them to be different, until it just cost me 2 hours to find a bug. Here is an e… Read more What's The Difference When Indexing A Numpy Array Between Using An Integer And A Numpy Scalar?

Go One Step Back And One Step Forward In A Loop With Python

I need to loop in a list containing french words and find an asterisk because I want to concatenate… Read more Go One Step Back And One Step Forward In A Loop With Python

Read From Line To Line Yelp Dataset By Python

I want to change this code to specifically read from line 1400001 to 1450000. What is modification?… Read more Read From Line To Line Yelp Dataset By Python

Replace Df Index Values With Values From A List But Ignore Empty Strings

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

Can't Create Index Due To Typeerror: Not Enough Arguments For Format String

I am trying to create indices with pymongo, but failing with error File 'D:/Users/Dims/Design/E… Read more Can't Create Index Due To Typeerror: Not Enough Arguments For Format String

Python Operator, No Operator For "not In"

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"

Merge Dataframes That Have Indices That One Contains Another (but Not The Same)

For example df1 has shape (533, 2176), indices such as Elkford (5901003) DM 01010, df2 has shape (7… Read more Merge Dataframes That Have Indices That One Contains Another (but Not The Same)

How To Get First And Last Element Of Tuple At The Same Time

I need to get the first and last dimension of an numpy.ndarray of arbitrary size. If I have shape(A… Read more How To Get First And Last Element Of Tuple At The Same Time

Numpy Array Crossing 2 Values And Gets The Index

I am trying to code a function where it gives me the indexes of where the values of lower or upper … Read more Numpy Array Crossing 2 Values And Gets The Index