Source Code for Module amplee.loader.utils

 1  # -*- coding: utf-8 -*- 
 2  __docformat__ = 'epytext' 
 3   
 4  import os.path 
 5  import imp 
 6  from xml.dom import XMLNS_NAMESPACE, XML_NAMESPACE 
 7   
 8  __all__ = ['get_value', 'get_attr_value', 'get_xml_attrs', 
 9             'is_present', 'load_callable'] 
10   
11 -def get_value(node, name, default=None): 
12      if name in node.xml_child_elements: 
13          return unicode(node.xml_child_elements[name]) 
14   
15      return default 
16   
17 -def get_attr_value(node, name, default=None): 
18      if node.is_attribute(name): 
19          return unicode(getattr(node, name)) 
20   
21      return default 
22   
23 -def get_xml_attrs(node): 
24      xml_attrs = {} 
25      for (ns, (prefix, local_name)) in node.attributes: 
26          if ns == XML_NAMESPACE: 
27              attr = node.attributes[(ns, (prefix, local_name))] 
28              xml_attrs[local_name] = attr.value 
29   
30      return xml_attrs 
31   
32 -def is_present(node, name): 
33      return name in node.xml_child_elements 
34            
35 -def load_callable(modulepath, cb, base_path=None): 
36      directory, name = os.path.split(modulepath) 
37      if base_path: 
38          directory = os.path.join(base_path, directory) 
39      file, filename, description = imp.find_module(name, [directory]) 
40      mod = imp.load_module(name, file, filename, description) 
41      if hasattr(mod, cb): 
42          return getattr(mod, cb) 
43      else: 
44          raise ImportError("cannot import name %s from %s" % (cb, name)) 
45