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from __future__ import absolute_import
import os
import imp
import sys
import re
import marshal
import warnings
try:
unicode
except NameError:
unicode = str
if sys.version_info[0] == 2:
from StringIO import StringIO as BytesIO
from StringIO import StringIO
else:
from io import BytesIO, StringIO
def imp_find_module(name, path=None):
"""
same as imp.find_module, but handles dotted names
"""
names = name.split('.')
if path is not None:
if isinstance(path, (str, unicode)):
path = [os.path.realpath(path)]
for name in names:
result = imp.find_module(name, path)
if result[0] is not None:
result[0].close()
path = [result[1]]
return result
def _check_importer_for_path(name, path_item):
try:
importer = sys.path_importer_cache[path_item]
except KeyError:
for path_hook in sys.path_hooks:
try:
importer = path_hook(path_item)
break
except ImportError:
pass
else:
importer = None
sys.path_importer_cache.setdefault(path_item, importer)
if importer is None:
try:
return imp.find_module(name, [path_item])
except ImportError:
return None
return importer.find_module(name)
def imp_walk(name):
"""
yields namepart, tuple_or_importer for each path item
raise ImportError if a name can not be found.
"""
warnings.warn("imp_walk will be removed in a future version", DeprecationWarning)
if name in sys.builtin_module_names:
yield name, (None, None, ("", "", imp.C_BUILTIN))
return
paths = sys.path
res = None
for namepart in name.split('.'):
for path_item in paths:
res = _check_importer_for_path(namepart, path_item)
if hasattr(res, 'load_module'):
if res.path.endswith('.py') or res.path.endswith('.pyw'):
fp = StringIO(res.get_source(namepart))
res = (fp, res.path, ('.py', 'rU', imp.PY_SOURCE))
elif res.path.endswith('.pyc') or res.path.endswith('.pyo'):
co = res.get_code(namepart)
fp = BytesIO(imp.get_magic() + b'\0\0\0\0' + marshal.dumps(co))
res = (fp, res.path, ('.pyc', 'rb', imp.PY_COMPILED))
else:
res = (None, loader.path, (os.path.splitext(loader.path)[-1], 'rb', imp.C_EXTENSION))
break
elif isinstance(res, tuple):
break
else:
break
yield namepart, res
paths = [os.path.join(path_item, namepart)]
else:
return
raise ImportError('No module named %s' % (name,))
cookie_re = re.compile(b"coding[:=]\s*([-\w.]+)")
if sys.version_info[0] == 2:
default_encoding = 'ascii'
else:
default_encoding = 'utf-8'
def guess_encoding(fp):
for i in range(2):
ln = fp.readline()
m = cookie_re.search(ln)
if m is not None:
return m.group(1).decode('ascii')
return default_encoding
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