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bpo-33440: Defer imports in pathlib to reduce its import time. by agfor · Pull Request #6820 · python/cpython · GitHub

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bpo-33440: Defer imports in pathlib to reduce its import time. #6820

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bpo-33440: Defer imports in pathlib to reduce its import time. #6820

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45f5e9b
bpo-33440: Defer imports in pathlib to reduce its import time.
agfor May 14, 2018
01d7fd4
bpo-33440: Remove unneeded import renames.
agfor May 14, 2018
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14 changes: 8 additions & 6 deletions Lib/pathlib.py
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Original file line number Diff line number Diff line change
@@ -1,16 +1,13 @@
import fnmatch
import functools
import io
import ntpath
import os
import posixpath
import re
import sys
from _collections_abc import Sequence
from errno import EINVAL, ENOENT, ENOTDIR
from operator import attrgetter
from stat import S_ISDIR, S_ISLNK, S_ISREG, S_ISSOCK, S_ISBLK, S_ISCHR, S_ISFIFO
from urllib.parse import quote_from_bytes as urlquote_from_bytes


supports_symlinks = True
Expand Down Expand Up @@ -226,15 +223,16 @@ def is_reserved(self, parts):

def make_uri(self, path):
# Under Windows, file URIs use the UTF-8 encoding.
from urllib.parse import quote_from_bytes
drive = path.drive
if len(drive) == 2 and drive[1] == ':':
# It's a path on a local drive => 'file:///c:/a/b'
rest = path.as_posix()[2:].lstrip('/')
return 'file:///%s/%s' % (
drive, urlquote_from_bytes(rest.encode('utf-8')))
drive, quote_from_bytes(rest.encode('utf-8')))
else:
# It's a path on a network drive => 'file://host/share/a/b'
return 'file:' + urlquote_from_bytes(path.as_posix().encode('utf-8'))
return 'file:' + quote_from_bytes(path.as_posix().encode('utf-8'))

def gethomedir(self, username):
if 'HOME' in os.environ:
Expand Down Expand Up @@ -347,8 +345,9 @@ def is_reserved(self, parts):
def make_uri(self, path):
# We represent the path using the local filesystem encoding,
# for portability to other applications.
from urllib.parse import quote_from_bytes
bpath = bytes(path)
return 'file://' + urlquote_from_bytes(bpath)
return 'file://' + quote_from_bytes(bpath)

def gethomedir(self, username):
if not username:
Expand Down Expand Up @@ -498,6 +497,8 @@ def _select_from(self, parent_path, is_dir, exists, scandir):
class _WildcardSelector(_Selector):

def __init__(self, pat, child_parts):
import fnmatch
import re
self.pat = re.compile(fnmatch.translate(pat))
_Selector.__init__(self, child_parts)

Expand Down Expand Up @@ -914,6 +915,7 @@ def match(self, path_pattern):
"""
Return True if this path matches the given pattern.
"""
import fnmatch
cf = self._flavour.casefold
path_pattern = cf(path_pattern)
drv, root, pat_parts = self._flavour.parse_parts((path_pattern,))
Expand Down
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