usertools: replace io.open
authorStephen Hemminger <stephen@networkplumber.org>
Wed, 4 Nov 2020 06:48:37 +0000 (22:48 -0800)
committerThomas Monjalon <thomas@monjalon.net>
Sun, 22 Nov 2020 21:04:11 +0000 (22:04 +0100)
The builtin open() is the recommended approach in python3.
io.open was for compatibility with older versions.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>

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