What type of PR is this?

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespaces from that line:

/kind bug

What does this PR do / why do we need it:
fix loaddata repeatedly in PyNative mode.For parameter, only load once.

Which issue(s) this PR fixes:

Fixes ##I1K5R9:Load data repeatedly in PyNative mode

Special notes for your reviewers: