python ast.literal_eval在给定“ datetime.datetime.now（）”的情况下抛出格式错误的字符串错误

Question

I need to evaluate the string before assigning it, so I am using eval. But I read eval is not good to use and instead use ast.literal_eval. But when using ast.literal_eval, I am getting malformed string error.

import datetime
x = eval('datetime.datetime.now()')
print x

Result:

2017-12-29 11:15:22.191322

Code with Ast

import datetime
import ast
x = ast.literal_eval('datetime.datetime.now()')

Result:

Malformed String

Answer 1

ast.literal_eval document clearly says:

Safely evaluate an expression node or a string containing a Python literal or container display.

The string or node provided may only consist of the following Python literal structures: strings, bytes, numbers, tuples, lists, dicts, sets, booleans, and None.