/usr/lib/python2.7/dist-packages/xstatic/pkg/angular_fileupload/data/ng-file-upload-shim.js is in python-xstatic-angular-fileupload 12.0.4.0+dfsg1-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/xstatic/pkg/angular_fileupload/data/../../../../../../../share/javascript/angular.js/ng-file-upload-shim.js