Apr 24, 2025 · Apr 2, 2025 · Apr 4, 2025 · Apr 6, 2025 · Apr 18, 2025 · Apr 18, 2025
diff --git a/Lib/shlex.py b/Lib/shlex.py
    return ' '.join(quote(arg) for arg in split_command)


 def _find_unsafe(s, /):
    # this function replaces itself with the compiled pattern on execution,
    # to allow as deferred import of re for performance
    global _find_unsafe
    import re
    _find_unsafe = re.compile(r'[^\w@%+=:,./-]', re.ASCII).search
    return _find_unsafe(s)


 def quote(s):
    """Return a shell-escaped version of the string *s*."""
    if not s:
        return "''"
    if _find_unsafe(s) is None:

    # Use bytes.translate() for performance
    safe_chars = (b'%+,-./0123456789:=@'
                  b'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'
                  b'abcdefghijklmnopqrstuvwxyz')
    if not s.encode().translate(None, delete=safe_chars):
        return s

    # use single quotes, and put single quotes into double quotes
diff --git a/Misc/NEWS.d/next/Library/2025-04-03-00-56-48.gh-issue-118761.Vb0S1B.rst b/Misc/NEWS.d/next/Library/2025-04-03-00-56-48.gh-issue-118761.Vb0S1B.rst
 Improve import times by up to 33x for the :mod:`shlex` module. Patch by Adam
 Turner.
 Improve import times by up to 33x for the :mod:`shlex` module,
 and improve the performance of :func:`shlex.quote` by up to 12x.
 Patch by Adam Turner.
Original file line number	Diff line number	Diff line change
Expand Up		@@ -317,20 +317,16 @@ def join(split_command):
		return ' '.join(quote(arg) for arg in split_command)


		def _find_unsafe(s, /):
		# this function replaces itself with the compiled pattern on execution,
		# to allow as deferred import of re for performance
		global _find_unsafe
		import re
		_find_unsafe = re.compile(r'[^\w@%+=:,./-]', re.ASCII).search
		return _find_unsafe(s)


		def quote(s):
		"""Return a shell-escaped version of the string s."""
		if not s:
		return "''"
		if _find_unsafe(s) is None:

		# Use bytes.translate() for performance
		safe_chars = (b'%+,-./0123456789:=@'
		b'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'
		b'abcdefghijklmnopqrstuvwxyz')
		if not s.encode().translate(None, delete=safe_chars):
AA-Turner marked this conversation as resolved. OutdatedShow resolvedHide resolved
		return s

		# use single quotes, and put single quotes into double quotes
Expand Down
Original file line number	Diff line number	Diff line change
		@@ -1,2 +1,3 @@
		Improve import times by up to 33x for the :mod:`shlex` module. Patch by Adam
		Turner.
		Improve import times by up to 33x for the :mod:`shlex` module,
		and improve the performance of :func:`shlex.quote` by up to 12x.
		Patch by Adam Turner.