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I am looking for a function specifically for python 3.7. I have a mathematical expression in a string :

str="2^10"   #Expected output: 1024

Is there any in-built function in python 3.7 to evaluate it?

P.S: eval() function doesnt work.

Anudocs
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    I am pretty sure it works https://repl.it/repls/WideeyedDutifulRecursion. However you might be looking for `str="2**10"` – DobromirM Apr 11 '19 at 11:19

1 Answers1

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The symbol for power operations in Python is **, not ^. So, change your string first.

str_ ="2^10"

print(eval(str_.replace('^', '**')))  # -> 1024

Note that eval is a potentially very dangerous function. Do not use it blindly.

A safer way would be with the (non-standard) module numexpr.

import numexpr

print(numexpr.evaluate(str_.replace('^', '**')))  # -> 1024

Also note that not replacing "^" with "**" would result in 8. That happens because in Python ^ is the binary XOR

Ma0
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