修复Bug-脱敏时未处理None（数据库的null）问题，导致结果为字符串的'None'。 #1460
Workflow file for this run
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| name: Lint | |
| on: [push, pull_request] | |
| jobs: | |
| lint: | |
| runs-on: ubuntu-latest | |
| steps: | |
| - uses: actions/checkout@v2 | |
| - uses: psf/black@stable |