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Add float precision variable to csv.writer / reader #110852
Description
Feature or enhancement
Proposal:
var_float_precision = 2
def format_item(item):
if isinstance(item, float):
return f"{item:.(var_float_precision)f}"I just now have the situation, that I want to print a 0 as 0.00, because the ERP system only detects it that way.
Please add the ability to define a custom precision for float numbers. Just recently the QUOTE_STRINGS was introduced into python, but when I manually format it to a 0.00 using {:.2f}".format(var)) it will obviously become a string, therefore it will print the variable in Quotes, which the ERP system again, does not detect.
Thank you!
Has this already been discussed elsewhere?
This is a minor feature, which does not need previous discussion elsewhere
Links to previous discussion of this feature:
No response
Activity
serhiy-storchaka commentedon Aug 3, 2026
gh-155097 (PR #155099) adds a
formatterparameter tocsv.writerwhich replaces thestr()call. Quoting is still decided by the original value, so a formatted number stays unquoted — which is exactly what'{:.2f}'.format(v)in your own code cannot do:The first argument is the 0-based column index, so the precision can differ per column. Strings and
Nonenever reach the formatter.