gh-116850: Fix argparse for namespaces with not directly writable dict #126919

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pkg-config 0.29.2_3 is already installed and up-to-date. To reinstall 0.29.2_3, run: brew reinstall pkg-config

xz 5.6.2 is already installed and up-to-date. To reinstall 5.6.2, run: brew reinstall xz

gdbm 1.24 is already installed and up-to-date. To reinstall 1.24, run: brew reinstall gdbm

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