Converting a String to a Boolean in Python

Question

How to convert a String to a Boolean? For example:

str = "False and False or True and True"
str = "( "+str+" )"
str = str.replace("and",") and (")

returns

str == '( False ) and ( False or True ) and ( True )'

How to execute str for result 'False'?

Answer 1

I think you are looking for eval:

>>> eval('( False ) and ( False or True ) and ( True )')
False

Notes:

• don't use eval on user input, see e.g. Why is using 'eval' a bad practice? and
• don't use str as a variable name; it shadows a Python built-in.