Check logical value inside a string in python [duplicate]

Question

I mean I have this string var:

mystr1 = "1==1 or 1==2"
mystr2 = "1==1 and 1==2"
if_logical_string(mystr1) must be True
if_logical_string(mystr2) must be False

How can I achieve this? Is there any lib to do so ? Thanks.

Dan Ionescu · Accepted Answer · 2018-09-29 09:56:50Z

2

mystr1 = "1==1 or 1==2"
mystr2 = "1==1 and 1==2"

# will output True
print(eval(mystr1))

# will output False
print(eval(mystr2))

If you have a mathematical expression, there is a more elegant way using Pyparsing. Check out this post: from Stackoverflow

answered Sep 29, 2018 at 9:56

Dan Ionescu

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Comments

Léopold Houdin · Accepted Answer · 2018-09-29 09:54:32Z

1

Yes, you can use python's eval function.

However, I would recommend having another approach... There's always another solution...

answered Sep 29, 2018 at 9:54

Léopold Houdin

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