44 lines
1.5 KiB
Python
44 lines
1.5 KiB
Python
import os
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import sys
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class suppress_stdout_stderr(object):
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# NOTE: these must be "saved" here to avoid exceptions when using
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# this context manager inside of a __del__ method
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open = open
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sys = sys
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os = os
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# Oddly enough this works better than the contextlib version
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def __enter__(self):
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self.outnull_file = self.open(self.os.devnull, "w")
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self.errnull_file = self.open(self.os.devnull, "w")
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self.old_stdout_fileno_undup = self.sys.stdout.fileno()
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self.old_stderr_fileno_undup = self.sys.stderr.fileno()
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self.old_stdout_fileno = self.os.dup(self.sys.stdout.fileno())
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self.old_stderr_fileno = self.os.dup(self.sys.stderr.fileno())
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self.old_stdout = self.sys.stdout
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self.old_stderr = self.sys.stderr
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self.os.dup2(self.outnull_file.fileno(), self.old_stdout_fileno_undup)
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self.os.dup2(self.errnull_file.fileno(), self.old_stderr_fileno_undup)
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self.sys.stdout = self.outnull_file
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self.sys.stderr = self.errnull_file
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return self
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def __exit__(self, *_):
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self.sys.stdout = self.old_stdout
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self.sys.stderr = self.old_stderr
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self.os.dup2(self.old_stdout_fileno, self.old_stdout_fileno_undup)
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self.os.dup2(self.old_stderr_fileno, self.old_stderr_fileno_undup)
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self.os.close(self.old_stdout_fileno)
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self.os.close(self.old_stderr_fileno)
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self.outnull_file.close()
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self.errnull_file.close()
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