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utils.py
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38 lines (27 loc) · 1.18 KB
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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()