Added support for passing Configuration object in run_tardis (#1559)

* added support to pass config objects in run_tardis

* updated docstrings

* added tests for the feature

* added docstrings

tardis/base.py

@@ -16,8 +16,8 @@ def run_tardis(
 
     Parameters
     ----------
-    config : str or dict
-        filename of configuration yaml file or dictionary
+    config : str or dict or tardis.io.config_reader.Configuration
+        filename of configuration yaml file or dictionary or TARDIS Configuration object
     atom_data : str or tardis.atomic.AtomData
         if atom_data is a string it is interpreted as a path to a file storing
         the atomic data. Atomic data to use for this TARDIS simulation. If set to None, the
@@ -41,10 +41,13 @@ def run_tardis(
         except TypeError:
             atom_data = atom_data
 
-    try:
-        tardis_config = Configuration.from_yaml(config)
-    except TypeError:
-        tardis_config = Configuration.from_config_dict(config)
+    if isinstance(config, Configuration):
+        tardis_config = config
+    else:
+        try:
+            tardis_config = Configuration.from_yaml(config)
+        except TypeError:
+            tardis_config = Configuration.from_config_dict(config)
 
     simulation = Simulation.from_config(
         tardis_config,

tardis/tests/test_tardis_full.py

@@ -8,6 +8,24 @@
 from tardis.simulation.base import Simulation
 from tardis.io.config_reader import Configuration
 
+from tardis import run_tardis
+
+
+def test_run_tardis_from_config_obj(atomic_data_fname):
+    """
+    Tests whether the run_tardis function can take in the Configuration object
+    as arguments
+    """
+    config = Configuration.from_yaml(
+        "tardis/io/tests/data/tardis_configv1_verysimple.yml"
+    )
+    config["atom_data"] = atomic_data_fname
+
+    try:
+        sim = run_tardis(config)
+    except Exception as e:
+        pytest.fail(str(e.args[0]))
+
 
 class TestRunnerSimple:
     """