Add Configuration.from_ini() method

docs/main/changelog.rst

@@ -7,6 +7,10 @@ that were made in every particular version.
 From version 0.7.6 *Dependency Injector* framework strictly 
 follows `Semantic versioning`_
 
+Development version
+-------------------
+- Add ``Configuration.from_ini()`` method to load configuration from ini file.
+
 3.17.1
 ------
 - Fix ``DynamicContainer`` deep-copying bug.

src/dependency_injector/providers.pyx

@@ -21,6 +21,10 @@ else:
     else:
         _is_coroutine_marker = True
 
+try:
+    import ConfigParser as iniconfigparser
+except ImportError:
+    import configparser as iniconfigparser
 
 from .errors import (
     Error,
@@ -1155,6 +1159,23 @@ cdef class Configuration(Object):
         """
         self.override(value)
 
+    def from_ini(self, filepath):
+        """Load configuration from ini file.
+
+        :param filepath: Path to the configuration file.
+        :type filepath: str
+
+        :rtype: None
+        """
+        parser = iniconfigparser.ConfigParser()
+        parser.read([filepath])
+
+        config = {}
+        for section in parser.sections():
+            config[section] = dict(parser[section])
+
+        self.override(config)
+
     def _create_children(self, value):
         children = dict()
 

tests/unit/providers/test_configuration_py2_py3.py

@@ -1,5 +1,8 @@
 """Dependency injector config providers unit tests."""
 
+import os
+import tempfile
+
 import unittest2 as unittest
 
 from dependency_injector import containers, providers
@@ -246,3 +249,32 @@ class ConfigLinkingTests(unittest.TestCase):
         self.assertEqual(services.config(), {'value': 'services2'})
         self.assertEqual(services.config.value(), 'services2')
         self.assertEqual(services.value_getter(), 'services2')
+
+
+class ConfigFromIniTests(unittest.TestCase):
+
+    def setUp(self):
+        self.config = providers.Configuration(name='config')
+        _, self.config_file = tempfile.mkstemp()
+
+        with open(self.config_file, 'w') as config_file:
+            config_file.write(
+                '[section1]\n'
+                'value1=1\n'
+                '\n'
+                '[section2]\n'
+                'value2=2\n'
+            )
+
+    def tearDown(self):
+        del self.config
+        os.unlink(self.config_file)
+
+    def test(self):
+        self.config.from_ini(self.config_file)
+
+        self.assertEqual(self.config(), {'section1': {'value1': '1'}, 'section2': {'value2': '2'}})
+        self.assertEqual(self.config.section1(), {'value1': '1'})
+        self.assertEqual(self.config.section1.value1(), '1')
+        self.assertEqual(self.config.section2(), {'value2': '2'})
+        self.assertEqual(self.config.section2.value2(), '2')