Comments (3)
phofl
commented on August 16, 2024
1
No, the memory layout prevents doing this efficiently
from pandas.
rhshadrach
commented on August 16, 2024
Thanks for the request. Series.assign would have to make a copy of the entire Series, whereas DataFrame.assign does not (now with Copy On Write). In general, expanding Series / DataFrame rows is something that should be avoided whenever possible for performance, and I think making this easier to do would encourage bad practices. For this reason, I'm currently opposed.
from pandas.
cbrummitt
commented on August 16, 2024
Got it. Is there a way to implement it like dict.update that would make it perform quickly?
from pandas.
Related Issues (20)
- ENH: interleave_columns function HOT 3
- QST: How to solve pandas (2.2.0) "FutureWarning: Downcasting behavior in `replace` is deprecated" on a Series? HOT 11
- BUG: ValueError with loc[] = (Regression 2.1.0) HOT 3
- BUG: Convertion fails for columns with datetime64[ms] HOT 3
- COMPAT: Utilize `copy` keyword in `__array__` HOT 1
- DEPR: groupby.idxmin/idxmax will all NA values HOT 2
- ENH: No longer always show hour, minute and second components for pd.Interval HOT 2
- BUG: `Timestamp.unit` should reflect changes in components after `Timestamp.replace` HOT 2
- BUG: .loc operation cannot locate existing index when having single string as index for dataframe ('string',) HOT 4
- DOC: Incorrect Description For pd.concat sort Argument HOT 4
- BUG: validity of interchange column is incorrectly set to Some for 'large-string[pyarrow]'
- BUG: interchange buffer show bytemask (instead of bitmask) validity for `'string[pyarrow]'`
- BUG: Setting a numpy array as a column in Pandas uses only the first column of the array. HOT 5
- BUG: to_parquet on column containing StringArray objects fails HOT 2
- BUG: groupby.apply when func always returns None returns empty dataframe HOT 3
- BUG: timedelta.round fails to round to nearest day HOT 5
- BUG: read_csv inconsistent behavior HOT 7
- DEPR: rename `startingMonth` to `starting_month` (argument in BQuarterBegin) HOT 1
- ENH: DataFrame argument `columns` should accept dict/iterable type HOT 8
Recommend Projects
-
React
A declarative, efficient, and flexible JavaScript library for building user interfaces.
-
Vue.js
🖖 Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.
-
Typescript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
-
TensorFlow
An Open Source Machine Learning Framework for Everyone
-
Django
The Web framework for perfectionists with deadlines.
-
Laravel
A PHP framework for web artisans
-
D3
Bring data to life with SVG, Canvas and HTML. 📊📈🎉
-
Recommend Topics
-
javascript
JavaScript (JS) is a lightweight interpreted programming language with first-class functions.
-
web
Some thing interesting about web. New door for the world.
-
server
A server is a program made to process requests and deliver data to clients.
-
Machine learning
Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.
-
Visualization
Some thing interesting about visualization, use data art
-
Game
Some thing interesting about game, make everyone happy.
Recommend Org
-
Facebook
We are working to build community through open source technology. NB: members must have two-factor auth.
-
Microsoft
Open source projects and samples from Microsoft.
-
Google
Google ❤️ Open Source for everyone.
-
Alibaba
Alibaba Open Source for everyone
-
D3
Data-Driven Documents codes.
-
Tencent
China tencent open source team.
from pandas.