AttributeError: 'str' object 没有属性 'str' - 调用没有“”的变量

Question

I have a string:

a = 'feature_selection = True'

When i want to call the variable "a" i get:

'feature_selection = True'

How can i call or store and call the variable "a" in order to get:

feature_selection = True

I have tried following, but got the error: "" all the time:

a.str.split(',')
a.apply(lambda x: x[1:-1].split(','))

Answer 1

If you want to get out the value, you can split it by = and take the last value.

>>> a = 'feature_selection = True'
>>> a
'feature_selection = True'

>>> val = a.split('=')[-1].strip()
>>> val
'True'

# Convert it to an actual boolean
>>> import ast
>>> ast.literal_eval(val)
True

If you want to execute the code, store by the string, you can use exec :

>>> exec(a)
>>> feature_selection
True