--- a/env/lib/python3.7/site-packages/lockfile/pidlockfile.py	Thu May 14 16:47:39 2020 -0400
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,190 +0,0 @@
-# -*- coding: utf-8 -*-
-
-# pidlockfile.py
-#
-# Copyright © 2008–2009 Ben Finney <ben+python@benfinney.id.au>
-#
-# This is free software: you may copy, modify, and/or distribute this work
-# under the terms of the Python Software Foundation License, version 2 or
-# later as published by the Python Software Foundation.
-# No warranty expressed or implied. See the file LICENSE.PSF-2 for details.
-
-""" Lockfile behaviour implemented via Unix PID files.
-    """
-
-from __future__ import absolute_import
-
-import errno
-import os
-import time
-
-from . import (LockBase, AlreadyLocked, LockFailed, NotLocked, NotMyLock,
-               LockTimeout)
-
-
-class PIDLockFile(LockBase):
-    """ Lockfile implemented as a Unix PID file.
-
-    The lock file is a normal file named by the attribute `path`.
-    A lock's PID file contains a single line of text, containing
-    the process ID (PID) of the process that acquired the lock.
-
-    >>> lock = PIDLockFile('somefile')
-    >>> lock = PIDLockFile('somefile')
-    """
-
-    def __init__(self, path, threaded=False, timeout=None):
-        # pid lockfiles don't support threaded operation, so always force
-        # False as the threaded arg.
-        LockBase.__init__(self, path, False, timeout)
-        self.unique_name = self.path
-
-    def read_pid(self):
-        """ Get the PID from the lock file.
-            """
-        return read_pid_from_pidfile(self.path)
-
-    def is_locked(self):
-        """ Test if the lock is currently held.
-
-            The lock is held if the PID file for this lock exists.
-
-            """
-        return os.path.exists(self.path)
-
-    def i_am_locking(self):
-        """ Test if the lock is held by the current process.
-
-        Returns ``True`` if the current process ID matches the
-        number stored in the PID file.
-        """
-        return self.is_locked() and os.getpid() == self.read_pid()
-
-    def acquire(self, timeout=None):
-        """ Acquire the lock.
-
-        Creates the PID file for this lock, or raises an error if
-        the lock could not be acquired.
-        """
-
-        timeout = timeout if timeout is not None else self.timeout
-        end_time = time.time()
-        if timeout is not None and timeout > 0:
-            end_time += timeout
-
-        while True:
-            try:
-                write_pid_to_pidfile(self.path)
-            except OSError as exc:
-                if exc.errno == errno.EEXIST:
-                    # The lock creation failed.  Maybe sleep a bit.
-                    if time.time() > end_time:
-                        if timeout is not None and timeout > 0:
-                            raise LockTimeout("Timeout waiting to acquire"
-                                              " lock for %s" %
-                                              self.path)
-                        else:
-                            raise AlreadyLocked("%s is already locked" %
-                                                self.path)
-                    time.sleep(timeout is not None and timeout / 10 or 0.1)
-                else:
-                    raise LockFailed("failed to create %s" % self.path)
-            else:
-                return
-
-    def release(self):
-        """ Release the lock.
-
-            Removes the PID file to release the lock, or raises an
-            error if the current process does not hold the lock.
-
-            """
-        if not self.is_locked():
-            raise NotLocked("%s is not locked" % self.path)
-        if not self.i_am_locking():
-            raise NotMyLock("%s is locked, but not by me" % self.path)
-        remove_existing_pidfile(self.path)
-
-    def break_lock(self):
-        """ Break an existing lock.
-
-            Removes the PID file if it already exists, otherwise does
-            nothing.
-
-            """
-        remove_existing_pidfile(self.path)
-
-
-def read_pid_from_pidfile(pidfile_path):
-    """ Read the PID recorded in the named PID file.
-
-        Read and return the numeric PID recorded as text in the named
-        PID file. If the PID file cannot be read, or if the content is
-        not a valid PID, return ``None``.
-
-        """
-    pid = None
-    try:
-        pidfile = open(pidfile_path, 'r')
-    except IOError:
-        pass
-    else:
-        # According to the FHS 2.3 section on PID files in /var/run:
-        #
-        #   The file must consist of the process identifier in
-        #   ASCII-encoded decimal, followed by a newline character.
-        #
-        #   Programs that read PID files should be somewhat flexible
-        #   in what they accept; i.e., they should ignore extra
-        #   whitespace, leading zeroes, absence of the trailing
-        #   newline, or additional lines in the PID file.
-
-        line = pidfile.readline().strip()
-        try:
-            pid = int(line)
-        except ValueError:
-            pass
-        pidfile.close()
-
-    return pid
-
-
-def write_pid_to_pidfile(pidfile_path):
-    """ Write the PID in the named PID file.
-
-        Get the numeric process ID (“PID”) of the current process
-        and write it to the named file as a line of text.
-
-        """
-    open_flags = (os.O_CREAT | os.O_EXCL | os.O_WRONLY)
-    open_mode = 0o644
-    pidfile_fd = os.open(pidfile_path, open_flags, open_mode)
-    pidfile = os.fdopen(pidfile_fd, 'w')
-
-    # According to the FHS 2.3 section on PID files in /var/run:
-    #
-    #   The file must consist of the process identifier in
-    #   ASCII-encoded decimal, followed by a newline character. For
-    #   example, if crond was process number 25, /var/run/crond.pid
-    #   would contain three characters: two, five, and newline.
-
-    pid = os.getpid()
-    pidfile.write("%s\n" % pid)
-    pidfile.close()
-
-
-def remove_existing_pidfile(pidfile_path):
-    """ Remove the named PID file if it exists.
-
-        Removing a PID file that doesn't already exist puts us in the
-        desired state, so we ignore the condition if the file does not
-        exist.
-
-        """
-    try:
-        os.remove(pidfile_path)
-    except OSError as exc:
-        if exc.errno == errno.ENOENT:
-            pass
-        else:
-            raise