diff --git a/lca_carbon_workflow.py b/lca_carbon_workflow.py
index 58e7b9c..ea3322d 100644
--- a/lca_carbon_workflow.py
+++ b/lca_carbon_workflow.py
@@ -33,8 +33,25 @@ class LCACarbonWorkflow:
           constructions_catalog_file,
           catalog='nrcan',
           building_parameters=('height', 'year_of_construction', 'function')):
-    self.file_path = Path(__file__).parent / 'input_files' / \
-                     InputGeoJsonContent(city_path).content
+    """
+      LCACarbonWorkflow takes a number of buildings and enrich the city object
+      using cerc-hub GeometryFactory and ConstructionFactory. Then it
+      calculates embodied and end of life carbon emission of each building.
+      It puts out the results of opening and envelop emission for each
+      mentioned cycle separately.
+      :param city_path: Either a path to the buildings (GeoJson)
+      file or the content of such a file.
+      :param archetypes_catalog_file_name: Path to the buildings'
+      archetypes (JSON).
+      :param constructions_catalog_file: Path to the construction materials
+      data.
+      :param catalog: Type of the catalog (in this case 'nrcan', the default
+       argument)
+      :param building_parameters: Parameters used for using the catalog (in
+      this case three default arguments)
+    """
+    self.file_path = Path(__file__).parent / 'input_files' / InputGeoJsonContent(
+      city_path).content
     self.catalogs_path = Path(__file__).parent / 'input_files'
     self.archetypes_catalog_file_name = archetypes_catalog_file_name
     self.constructions_catalog_file = constructions_catalog_file