CODEWITHSUNDEEP
pythonexec
aIKid
aIKid

Reputation: 28302

Differences between InteractiveInterpreter.runcode and the exec function?

I have this piece of code:

import code

interpreter = code.InteractiveInterpreter()
myCode = code.compile_command('if True: print("IT\'S TRUE!!")')
interpreter.runcode(myCode)

I'm wondering, what is the difference between InteractiveInterpreter.runcode() and a normal exec() function? The code above doesn't work, but this one does:

exec("if True: print('IT\'S TRUE!!')")

Upvotes: 1

Views: 470

Answers (1)

falsetru
falsetru

Reputation: 369364

>>> import code
>>> 
>>> interpreter = code.InteractiveInterpreter()
>>> myCode = code.compile_command('if True: print("IT\'S ONE!!")')
>>> interpreter.runcode(myCode)
TypeError: exec: arg 1 must be a string, file, or code object

It's obvious that interpreter.runcode accept string or code.

But myCode is None.

>>> myCode
>>>

According to code.compile_command documentation:

... Returns a code object (the same as compile(source, filename, symbol)) if the command is complete and valid; None if the command is incomplete; raises SyntaxError if the command is complete and contains a syntax error, or raises OverflowError or ValueError if the command contains an invalid literal.

If you pass a string to interpreter.runcode, it works.

>>> interpreter.runcode('if True: print("IT\'S ONE!!")')
IT'S ONE!!

Upvotes: 1

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