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utils.py

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import os

import sys

class suppress_stdout_stderr(object):

# Oddly enough this works better than the contextlib version

def __enter__(self):

self.outnull_file = open(os.devnull, "w")

self.errnull_file = open(os.devnull, "w")

self.old_stdout_fileno_undup = sys.stdout.fileno()

self.old_stderr_fileno_undup = sys.stderr.fileno()

self.old_stdout_fileno = os.dup(sys.stdout.fileno())

self.old_stderr_fileno = os.dup(sys.stderr.fileno())

self.old_stdout = sys.stdout

self.old_stderr = sys.stderr

os.dup2(self.outnull_file.fileno(), self.old_stdout_fileno_undup)

os.dup2(self.errnull_file.fileno(), self.old_stderr_fileno_undup)

sys.stdout = self.outnull_file

sys.stderr = self.errnull_file

return self

def __exit__(self, *_):

sys.stdout = self.old_stdout

sys.stderr = self.old_stderr

os.dup2(self.old_stdout_fileno, self.old_stdout_fileno_undup)

os.dup2(self.old_stderr_fileno, self.old_stderr_fileno_undup)

os.close(self.old_stdout_fileno)

os.close(self.old_stderr_fileno)

self.outnull_file.close()

self.errnull_file.close()