fix flake8

Author: Nanguage

executor/engine/job/base.py

@@ -256,8 +256,8 @@ def process_func(self):
         change the dir, redirect the stdout and stderr
         before the actual run."""
         cache_dir = self.cache_dir.resolve()
-        if (self.redirect_out_err is not False) and \
-            (not isinstance(self.func, CaptureOut)):
+        is_redirect = (self.redirect_out_err is not False)
+        if is_redirect and (not isinstance(self.func, CaptureOut)):
             if isinstance(self.redirect_out_err, str):
                 path_stdout = Path(self.redirect_out_err)
                 path_stderr = Path(self.redirect_out_err)