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try:
# this works on Python < 3.12
from imp import *
except ImportError:
# this is a limited emulation for Python >= 3.12.
# Note that this is used only for tests or for the old ffi.verify().
# This is copied from the source code of Python 3.11.
from _imp import (acquire_lock, release_lock,
is_builtin, is_frozen)
from importlib._bootstrap import _load
from importlib import machinery
import os
import sys
import tokenize
SEARCH_ERROR = 0
PY_SOURCE = 1
PY_COMPILED = 2
C_EXTENSION = 3
PY_RESOURCE = 4
PKG_DIRECTORY = 5
C_BUILTIN = 6
PY_FROZEN = 7
PY_CODERESOURCE = 8
IMP_HOOK = 9
def get_suffixes():
extensions = [(s, 'rb', C_EXTENSION)
for s in machinery.EXTENSION_SUFFIXES]
source = [(s, 'r', PY_SOURCE) for s in machinery.SOURCE_SUFFIXES]
bytecode = [(s, 'rb', PY_COMPILED) for s in machinery.BYTECODE_SUFFIXES]
return extensions + source + bytecode
def find_module(name, path=None):
if not isinstance(name, str):
raise TypeError("'name' must be a str, not {}".format(type(name)))
elif not isinstance(path, (type(None), list)):
# Backwards-compatibility
raise RuntimeError("'path' must be None or a list, "
"not {}".format(type(path)))
if path is None:
if is_builtin(name):
return None, None, ('', '', C_BUILTIN)
elif is_frozen(name):
return None, None, ('', '', PY_FROZEN)
else:
path = sys.path
for entry in path:
package_directory = os.path.join(entry, name)
for suffix in ['.py', machinery.BYTECODE_SUFFIXES[0]]:
package_file_name = '__init__' + suffix
file_path = os.path.join(package_directory, package_file_name)
if os.path.isfile(file_path):
return None, package_directory, ('', '', PKG_DIRECTORY)
for suffix, mode, type_ in get_suffixes():
file_name = name + suffix
file_path = os.path.join(entry, file_name)
if os.path.isfile(file_path):
break
else:
continue
break # Break out of outer loop when breaking out of inner loop.
else:
raise ImportError(name, name=name)
encoding = None
if 'b' not in mode:
with open(file_path, 'rb') as file:
encoding = tokenize.detect_encoding(file.readline)[0]
file = open(file_path, mode, encoding=encoding)
return file, file_path, (suffix, mode, type_)
def load_dynamic(name, path, file=None):
loader = machinery.ExtensionFileLoader(name, path)
spec = machinery.ModuleSpec(name=name, loader=loader, origin=path)
return _load(spec)
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