我看了django是怎么处理的

django.utils。Module_loading有这个

def import_string(dotted_path):
    """
    Import a dotted module path and return the attribute/class designated by the
    last name in the path. Raise ImportError if the import failed.
    """
    try:
        module_path, class_name = dotted_path.rsplit('.', 1)
    except ValueError:
        msg = "%s doesn't look like a module path" % dotted_path
        six.reraise(ImportError, ImportError(msg), sys.exc_info()[2])

    module = import_module(module_path)

    try:
        return getattr(module, class_name)
    except AttributeError:
        msg = 'Module "%s" does not define a "%s" attribute/class' % (
            module_path, class_name)
        six.reraise(ImportError, ImportError(msg), sys.exc_info()[2])

你可以像import_string("module_path.to.all.the.way.to.your_class")一样使用它。

我看了django是怎么处理的

django.utils。Module_loading有这个

def import_string(dotted_path):
    """
    Import a dotted module path and return the attribute/class designated by the
    last name in the path. Raise ImportError if the import failed.
    """
    try:
        module_path, class_name = dotted_path.rsplit('.', 1)
    except ValueError:
        msg = "%s doesn't look like a module path" % dotted_path
        six.reraise(ImportError, ImportError(msg), sys.exc_info()[2])

    module = import_module(module_path)

    try:
        return getattr(module, class_name)
    except AttributeError:
        msg = 'Module "%s" does not define a "%s" attribute/class' % (
            module_path, class_name)
        six.reraise(ImportError, ImportError(msg), sys.exc_info()[2])

你可以像import_string("module_path.to.all.the.way.to.your_class")一样使用它。

你可以这样做:

globals()[class_name]

import sys
import types

def str_to_class(field):
    try:
        identifier = getattr(sys.modules[__name__], field)
    except AttributeError:
        raise NameError("%s doesn't exist." % field)
    if isinstance(identifier, (types.ClassType, types.TypeType)):
        return identifier
    raise TypeError("%s is not a class." % field)

这可以准确地处理旧样式和新样式的类。

这是可行的:

import sys

def str_to_class(classname):
    return getattr(sys.modules[__name__], classname)

在任意代码执行方面，或者不希望用户传递的名称，您可以有一个可接受的函数/类名称列表，如果输入与列表中的一个匹配，则对其进行计算。

PS:我知道....有点晚了…但这是为将来偶然发现这个的人准备的。