fix: example errors & ci errors

[seeflood]

Signed-off-by: seeflood zhou.qunli@foxmail.com

What this PR does:
fix example errors & ci errors

Which issue(s) this PR fixes:

Fixes #757

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

[codecov]

Codecov Report

Base: 60.56% // Head: 60.56% // No change to project coverage 👍

Coverage data is based on head (b88048c) compared to base (767f58f).
Patch has no changes to coverable lines.

❗ Current head b88048c differs from pull request most recent head 0b9bc9e. Consider uploading reports for the commit 0b9bc9e to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #787   +/-   ##
=======================================
  Coverage   60.56%   60.56%           
=======================================
  Files         133      133           
  Lines        8340     8340           
=======================================
  Hits         5051     5051           
  Misses       2712     2712           
  Partials      577      577           

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