出于安全考虑，我们使用GPG2签署了每次提交。通常，这涉及到一个完整的终端窗口“弹出窗口”，要求您在运行git commit之后输入密码（终端屏幕仅由GPG消息代替）。但是，我们已经在提交之前开始使用python的pre-commit工具运行linting了，并且没有出现“弹出窗口”。这是我得到的错误：
$ git commit -m "fix linting issues"
autopep8 wrapper.........................................................Passed
Flake8...................................................................Passed
Check python ast.........................................................Passed
Check for added large files..............................................Passed
Check JSON...............................................................Passed
Check for merge conflicts................................................Passed
Check for case conflicts.................................................Passed
Check Yaml...............................................................Passed
Debug Statements (Python)................................................Passed
Detect Private Key.......................................................Passed
Fix double quoted strings................................................Passed
Fix End of Files.........................................................Passed
Forbid new submodules....................................................Passed
Trim Trailing Whitespace.................................................Passed
Pretty format JSON.......................................................Passed
pylint...................................................................Passed
error: gpg failed to sign the data
fatal: failed to write commit object