# std_modules.py is a long-living program that communicates over STDIN and

# STDOUT. STDIN receives module names, one per line. For each module statement

# it evaluates, it outputs true/false for whether the module is part of the

# standard library or not.

import os

import sys

from contextlib import redirect_stdout

def is_std_modules(module):

# If for some reason a module (such as pygame, see https://github.com/pygame/pygame/issues/542)

# prints to stdout upon import,

# the output of this script should still be parseable by golang.

# Therefore, redirect stdout while running the import.

with redirect_stdout(os.devnull):

try:

__import__(module, globals(), locals(), [], 0)

return True

except Exception:

return False

def main(stdin, stdout):

for module in stdin:

module = module.strip()

# Don't print the boolean directly as it is capitalized in Python.

print(

"true" if is_std_modules(module) else "false",

end="\n",

file=stdout,

)

stdout.flush()

if __name__ == "__main__":

exit(main(sys.stdin, sys.stdout))