Execute python code inside a string and store it to a variable [duplicate]

Question

I'm trying to make a python program that when you input a code, it executes it. It has 2 problems and I need to fix it. I want it when you executed the code, it gets stored in a variable

I want't the result will be:

You executed [code] and the result was: [result]

now if I'm gonna do this:

code = 'print("hello world")'

interpreted = exec(code)

print(f"You executed {code} and the result was: {interpreted}")

this shows:

hello world
You executed print("hello world") and the result was: None

It returns none and the executed code was at the top I want to get rid of 'none'.

2nd: when i type print('hello') it throws an error

 File "main.py", line 1                                                                                                              
    code = 'print('hello world')'                                                                                                     
                       ^                                                                                                              
SyntaxError: invalid syntax

hello world becomes an invalid syntax how do I fix problem 1 and 2? Thanks in advance :)

Use a mix of single and double quotes in your code statement. — Mayank Porwal
– Mayank Porwal, Commented Apr 26, 2021 at 13:25
print function dont return anything so output will be always none for print statement — Amit Nanaware
– Amit Nanaware, Commented Apr 26, 2021 at 13:29

Amit Nanaware · Accepted Answer · 2021-04-26 13:32:28Z

3

the exec function will not return anything instead of this you can use eval here to get output.

But in your example print print wont give you any result but other function will give you result

check below code:

code = 'int(1.23232)'
interpreted = eval(code)
print(f"You executed {code} and the result was: {interpreted}")

answered Apr 26, 2021 at 13:32

Amit Nanaware

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3 Comments

Banana Code Over a year ago

still don't work, it gave me none when I changed the code

Banana Code Over a year ago

I want it when you executed the code, it gets stored in a variable

Amit Nanaware Over a year ago

If you use print function it wont return anything that can not be stored in variable.

Suramuthu R · Accepted Answer · 2023-10-15 11:18:18Z

0

This is how you should do.

code = '''
def helloworld(): return "hello world"\n
hw = helloworld()
'''
exec(code)
r  = locals()['hw'] 
print(f"You executed code and the result was: {r}")

answered Oct 15, 2023 at 11:18

Suramuthu R

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