feature #49580: support new-style float_format string in to_csv #61650
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
pedromfdiogo
force-pushed
the
feature#49580
branch
from
de303c7 to
d7ffede
Compare
…_csv
feat(to_csv): support new-style float_format strings using str.format
Detect and process new-style format strings (e.g., "{:,.2f}") in the
float_format parameter of to_csv.
- Check if float_format is a string and matches new-style pattern
- Convert it to a callable (e.g., lambda x: float_format.format(x))
- Ensure compatibility with NaN values and mixed data types
- Improves formatting output for floats when exporting to CSV
Example:
df = pd.DataFrame([1234.56789, 9876.54321])
df.to_csv(float_format="{:,.2f}") # now outputs formatted values like
1,234.57
Co-authored-by: Pedro Santos <[email protected]>
pedromfdiogo
force-pushed
the
feature#49580
branch
from
d7ffede to
1983866
Compare
|
@simonjayhawkins Hi! Just wanted to check if this PR needs anything else from my side. Thanks in advance for reviewing |
mroeschke
reviewed
Jun 30, 2025
mroeschke
reviewed
Jun 30, 2025
mroeschke
reviewed
Jun 30, 2025
mroeschke
reviewed
Jun 30, 2025
|
Could you add a whatsnew entry in |
Co-authored-by: Matthew Roeschke <[email protected]>
Co-authored-by: Matthew Roeschke <[email protected]>
Co-authored-by: Matthew Roeschke <[email protected]>
|
@mroeschke What do you think of the updates? |
…_produces_warning
Co-authored-by: Simon Hawkins <[email protected]>
pedromfdiogo
force-pushed
the
feature#49580
branch
from
0557a34 to
dadf0af
Compare
pedromfdiogo
force-pushed
the
feature#49580
branch
2 times, most recently
from
9123340 to
4f87711
Compare
pedromfdiogo
force-pushed
the
feature#49580
branch
from
4f87711 to
f09df30
Compare
|
I failed 1 test, but I don't know why because it doesn't seem to be related to the changes |
mroeschke
approved these changes
Jul 8, 2025
|
Thanks @pedromfdiogo |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
feat(to_csv): support new-style float_format strings using str.format
Detect and process new-style format strings (e.g., "{:,.2f}") in the float_format parameter of to_csv.
Example:
df = pd.DataFrame([1234.56789, 9876.54321])
df.to_csv(float_format="{:,.2f}") # now outputs formatted values like 1,234.57 and support new-style without .format
doc/source/whatsnew/v3.0.0.rstfile if fixing a bug or adding a new feature.