New submission from Steven D'Aprano <[email protected]>:
Whenever I use decimal and need to change the context temporarily, without fail
I try to write
with decimal.localcontext(prec=10):
...
or similar. Then I get surprised that it fails, and re-write it as
with decimal.localcontext() as ctx:
ctx.prec = 10
...
Let's make the first version work. localcontext should accept keyword arguments
corresponding to the same arguments accepted by Context, and set them on the
context given.
A proof-of-concept wrapper function:
def localcontext(ctx=None, **kwargs):
if ctx is None:
ctx = decimal.getcontext().copy()
for key, value in kwargs.items():
setattr(ctx, key, value)
return decimal.localcontext(ctx)
I think this would be a valuable, and useful, improvement to the decimal API.
----------
components: Library (Lib)
messages: 416114
nosy: steven.daprano
priority: normal
severity: normal
status: open
title: Allow decimal.localcontext to accept keyword arguments to set context
attributes
versions: Python 3.11
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<https://bugs.python.org/issue47135>
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