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Avoid "LookupError: unknown encoding: ascii" when open() called in a … #1012

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Jan 15, 2024
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Avoid "LookupError: unknown encoding: ascii" when open() called in a … #1012

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20 changes: 9 additions & 11 deletions llama_cpp/_utils.py
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Original file line number Diff line number Diff line change
@@ -1,11 +1,15 @@
import os
import sys

import sys, traceback

# Avoid "LookupError: unknown encoding: ascii" when open() called in a destructor
outnull_file = open(os.devnull, "w")
errnull_file = open(os.devnull, "w")

class suppress_stdout_stderr(object):
# NOTE: these must be "saved" here to avoid exceptions when using
# this context manager inside of a __del__ method
open = open
sys = sys
os = os

Expand All @@ -21,9 +25,6 @@ def __enter__(self):
if not hasattr(self.sys.stdout, 'fileno') or not hasattr(self.sys.stderr, 'fileno'):
return self # Return the instance without making changes

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

self.old_stdout_fileno_undup = self.sys.stdout.fileno()
self.old_stderr_fileno_undup = self.sys.stderr.fileno()

Expand All @@ -33,11 +34,11 @@ def __enter__(self):
self.old_stdout = self.sys.stdout
self.old_stderr = self.sys.stderr

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

self.sys.stdout = self.outnull_file
self.sys.stderr = self.errnull_file
self.sys.stdout = outnull_file
self.sys.stderr = errnull_file
return self

def __exit__(self, *_):
Expand All @@ -54,6 +55,3 @@ def __exit__(self, *_):

self.os.close(self.old_stdout_fileno)
self.os.close(self.old_stderr_fileno)

self.outnull_file.close()
self.errnull_file.close()