New submission from David Pratten <da...@prattenmail.com>:
Hi Example "eg def2" works but "eg def4" gives an error? David ``` emp = [ { "empno": 7839, "mgr": 0, "ename": "KING" }, { "empno": 7566, "mgr": 7839, "ename": "JONES" }, { "empno": 7698, "mgr": 7839, "ename": "BLAKE" } ] a = [e for e in emp if e["mgr"] == 0] print('eg 1', [b for b in a]) print('eg 2', eval('[b for b in a]')) print('eg 3', [e for e in emp for b in a if e["mgr"] == b["empno"]]) print('eg 4', eval('[e for e in emp for b in a if e["mgr"] == b["empno"]]')) def eval_anomaly(): a_anomaly = [e for e in emp if e["mgr"] == 0] print('eg def1', [b for b in a_anomaly]) print('eg def2', eval('[b for b in a_anomaly]')) print('eg def3', [e for e in emp for b in a_anomaly if e["mgr"] == b["empno"]]) print('eg def4', eval('[e for e in emp for b in a_anomaly if e["mgr"] == b["empno"]]')) eval_anomaly() ``` ---------- messages: 406743 nosy: david2 priority: normal severity: normal status: open title: Anomaly of eval() of list comprehension type: behavior versions: Python 3.9 _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue45862> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com