Why '$pull' does not work in cherrypy

Question

I used $pull for removing a field in embedded document in mongodb. i used cherrypy to implemet this. this is my code.

models.login_info.update({},{$pull:{location:{time:date}}})

but while i run this code it gives me lexical error as follows.

Lexical error at line 48, column 39. Encountered: "$" (36), after : ""

in the terminal i get the following error notification

models.login_info.update({},{$pull:{location:{time:date}}}) ^ SyntaxError: invalid syntax

Answer 1

包裹$pull引号：

'$pull': {...