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(jelmer) Reduce the number of connections made during "bzr branch
 --stacked". (Jelmer Vernooij)

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bzrlib/lock.py
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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"""Locking using OS file locks or file existence.
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Note: This method of locking is generally deprecated in favour of LockDir, but
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unlock() method.
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"""
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from __future__ import absolute_import
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import errno
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import os
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import sys