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Support copy.replace() for argparse.Namespace #155043

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Support copy.replace() for argparse.Namespace#155043
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stdlibStandard Library Python modules in the Lib/ directorytype-featureA feature request or enhancement

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@serhiy-storchaka
serhiy-storchaka
opened on Aug 1, 2026

Feature or enhancement

types.SimpleNamespace supports copy.replace() (gh-109174), but argparse.Namespace, its analogue in argparse, does not.

I propose to support it with the same semantics: copy.replace(args, verbose=True) returns a new namespace with the specified attributes replaced or added.

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  1. serhiy-storchaka
    added
    type-featureA feature request or enhancement
    on Aug 1, 2026
  2. serhiy-storchaka
    added this to Argparse issuesand Pickle and copy issues 🥒on Aug 1, 2026
  3. StanFromIreland
    added
    stdlibStandard Library Python modules in the Lib/ directory
    on Aug 1, 2026
  4. savannahostrowski
    added a commit that references this issue on Aug 5, 2026

    gh-155043: Support copy.replace() for argparse.Namespace (#155049)

    9dc11d8
  5. serhiy-storchaka
    closed this as completedon Aug 5, 2026
  6. github-project-automation
    moved this to Doc issues in Argparse issueson Aug 5, 2026
  7. github-project-automation
    moved this to Done in Pickle and copy issues 🥒on Aug 5, 2026
  8. mbeijen
    added a commit that references this issue on Aug 14, 2026

    pythongh-155043: Support copy.replace() for argparse.Namespace (pytho…

    6f5a9fe
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