10 examples of 'python import function from another directory' in Python

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def import_dir(name, fromlist=()):
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    PACKAGE_EXT = '.sublime-package'
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    dirname = os.path.basename(os.path.dirname(os.path.realpath(__file__)))
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    if dirname.endswith(PACKAGE_EXT):
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        dirname = dirname[:-len(PACKAGE_EXT)]
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    return __import__('{0}.{1}'.format(dirname, name), fromlist=fromlist)

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def __import__(name, globals=None, locals=None, fromlist=None):
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    """An alternative to the import function so that we can import
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    modules defined as strings.
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    This code was taken from: http://docs.python.org/lib/examples-imp.html
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    """
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    # Fast path: see if the module has already been imported.
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    try:
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        return sys.modules[name]
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    except KeyError:
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        pass
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    # If any of the following calls raises an exception,
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    # there's a problem we can't handle -- let the caller handle it.
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    module_name = name.split('.')[-1]
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    module_path = os.path.join(EXAMPLE_DIR, *name.split('.')[:-1])
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    fp, pathname, description = imp.find_module(module_name, [module_path])
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    try:
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        return imp.load_module(module_name, fp, pathname, description)
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    finally:
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        # Since we may exit via an exception, close fp explicitly.
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        if fp:
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            fp.close()

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def _import_from(mod, path, mod_dir=None):
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    """
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    Imports a module from a specific path
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    :param mod:
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        A unicode string of the module name
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    :param path:
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        A unicode string to the directory containing the module
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    :param mod_dir:
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        If the sub directory of "path" is different than the "mod" name,
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        pass the sub directory as a unicode string
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    :return:
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        None if not loaded, otherwise the module
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    """
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    if mod_dir is None:
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        mod_dir = mod
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    if not os.path.exists(path):
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        return None
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    if not os.path.exists(os.path.join(path, mod_dir)):
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        return None
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    try:
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        mod_info = imp.find_module(mod_dir, [path])
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        return imp.load_module(mod, *mod_info)
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    except ImportError:
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        return None

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def import_path(path):
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    path = os.path.abspath(path)
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    path, file = os.path.split(path)
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    file, ext = os.path.splitext(file)
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    sys.path.append(path)
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    module = __import__(file)
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    sys.path.pop()
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    return module

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def import_from_directory(library, path):
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    """Import a library from a directory outside the path.
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    Parameters
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    ----------
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    library: string
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        The name of the library.
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    path: string
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        The path of the folder containing the library.
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    """
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    try:
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        return importlib.import_module(library)
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    except ImportError:
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        module_path = os.path.abspath(path)
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        version = sys.version_info
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        if version.major == 2:
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            f, filename, desc = imp.find_module(library, [module_path])
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            return imp.load_module(library, f, filename, desc)
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        else:
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            sys.path.append(module_path)
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            return importlib.import_module(library)

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def my_import(name):
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    """ dynamic importing """
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    module, attr = name.rsplit('.', 1)
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    mod = __import__(module, fromlist=[attr])
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    klass = getattr(mod, attr)
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    return klass()

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def import_modules_from_package(package):
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    """Import modules from package and append into sys.modules
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    :param package: Full package name. For example: rally.plugins.openstack
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    """
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    path = [os.path.dirname(rally.__file__), ".."] + package.split(".")
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    path = os.path.join(*path)
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    for root, dirs, files in os.walk(path):
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        for filename in files:
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            if filename.startswith("__") or not filename.endswith(".py"):
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                continue
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            new_package = ".".join(root.split(os.sep)).split("....")[1]
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            module_name = "%s.%s" % (new_package, filename[:-3])
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            if module_name not in sys.modules:
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                sys.modules[module_name] = importlib.import_module(module_name)

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def import_class(from_path, full_class_name):
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  from_path = str(from_path)
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  full_class_name = str(full_class_name)
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  try:
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    return import_class_from_path(from_path, full_class_name)
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  except Exception as e:
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    our_dir = os.path.dirname(os.path.abspath(inspect.getfile(inspect.currentframe())))
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    api_dir = os.path.join(our_dir, PULSAR_API_ROOT, PULSAR_FUNCTIONS_API_ROOT)
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    try:
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      return import_class_from_path(api_dir, full_class_name)
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    except Exception as e:
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      Log.info("Failed to import class %s from path %s" % (full_class_name, from_path))
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      Log.info(e, exc_info=True)
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      return None

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def global_import(rootDir):
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    # 判断传入的路径下是否有“__init__.py”这个文件了，如果没有则创建，否则import会认为没有这个moudle
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    if os.path.exists(rootDir):
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        arr = rootDir.split("/")
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        pathDir = ""
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        for path in arr:
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            pathDir = "%s%s/" % (pathDir, path)
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            if pathDir != "./":
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                if not os.path.exists("%s__init__.py" % pathDir):
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                    with open("%s__init__.py" % pathDir, "w") as tmp:
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                        del tmp
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    # 遍历文件夹找出app_开头的py文件，导入，注意globals，否则作用域只是在这个函数下
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    for dirName, subdirList, fileList in os.walk(rootDir):
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        for file_name in fileList:
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            if "GN_APP" in file_name and "pyc" not in file_name:
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                impPath = ""
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                if dirName[-1:] != "/":
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                    dirName = dirName.replace("\\", "/")
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                    impPath = dirName.replace("/", ".")[2:]
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                else:
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                    dirName = dirName.replace("\\", "/")
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                    impPath = dirName.replace("/", ".")[2:-1]
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                if impPath != "":
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                    exe_str = "from %s.%s import * " % (impPath, file_name[:-3])
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                else:
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                    exe_str = "from %s import * " % file_name[:-3]
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                print exe_str
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                exec (exe_str, globals())

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def _importfrom(modname):
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    # from .edenscmnative import  (where . is looked through this module)
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    fakelocals = {}
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    pkg = __import__("edenscmnative", globals(), fakelocals, [modname], level=0)
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    try:
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        fakelocals[modname] = mod = getattr(pkg, modname)
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    except AttributeError:
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        raise ImportError(r"cannot import name %s" % modname)
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    # force import; fakelocals[modname] may be replaced with the real module
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    getattr(mod, r"__doc__", None)
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    return fakelocals[modname]