Merge branch 'feature/ghi-#4-utils' into develop

snowsaw/util/__init__.py

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+"""
+Provides project utils.
+"""

snowsaw/util/compat.py

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+def with_metaclass(meta, *bases):
+    class metaclass(meta):
+        def __new__(cls, name, this_bases, d):
+            return meta(name, bases, d)
+    return type.__new__(metaclass, 'metaclass', (), {})

snowsaw/util/module.py

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+import os.path
+import sys
+
+loaded_modules = []
+
+
+def load(path):
+    """
+    Loads the module from the specified path.
+
+    :param path: The path to load the module of
+    :return: The loaded module
+    """
+    basename = os.path.basename(path)
+    module_name, extension = os.path.splitext(basename)
+    plugin = load_module(module_name, path)
+    loaded_modules.append(plugin)
+
+
+if sys.version_info >= (3, 5):
+    import importlib.util
+
+
+    def load_module(module_name, path):
+        """
+        Loads the module with the specified name from the path.
+
+        :param module_name: The name of the module to load
+        :param path: The path to load the module of
+        :return: The loaded module
+        """
+        spec = importlib.util.spec_from_file_location(module_name, path)
+        module = importlib.util.module_from_spec(spec)
+        spec.loader.exec_module(module)
+        return module
+elif sys.version_info >= (3, 3):
+    from importlib.machinery import SourceFileLoader
+
+
+    def load_module(module_name, path):
+        """
+        Loads the module with the specified name from the path.
+
+        :param module_name: The name of the module to load
+        :param path: The path to load the module of
+        :return: The loaded module
+        """
+        return SourceFileLoader(module_name, path).load_module()

snowsaw/util/singleton.py

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+class Singleton(type):
+    _instances = {}
+
+    def __call__(cls, *args, **kwargs):
+        if cls not in cls._instances:
+            cls._instances[cls] = super(Singleton, cls).__call__(*args, **kwargs)
+        return cls._instances[cls]