Create the docstrings for the gallery and update the demo page.

pages/Gallery.py

@@ -17,23 +17,62 @@
     },
 )
 
-source_code = """
+source_code = '''
 import streamlit as st
 from streamlit_uploads_library.library import Library
 
 class Gallery(Library):
+    """Create a simple gallery out of streamlit widgets.
+
+    Using the gallery is simple, import `streamlit_uploads_library` and then instantiate the class with the 
+    required `directory` variable. Other options can be configured by passing in different variables 
+    when instantiating the class.
+
+    Example Usage:
+        python
+        import streamlit as st
+        from streamlit_uploads_library.gallery import Gallery
+
+        st.set_page_config(page_title="Streamlit Uploads Library", layout="wide")
+        default_gallery = Gallery(directory="assets")
+   
+    Args:
+        directory (str): A str() of the path to the folder containing the gallery images, for example, "assets".
+        file_extensions (tuple): A tuple() containing strings of the file extensions to include in the gallery, default is (".png", ".jpg", ".jpeg").
+        number_of_columns (int): An int() defining the number of required columns, default is 5.
+        uid (str): A str() containing a unique identifier allowing you to create multiple galleries on the same page containing the same images.
+    """
     def __init__(self, directory, file_extensions=(".png", ".jpg", ".jpeg"), number_of_columns=5, uid="gallery"):
         image_alignment = "center"
         show_details=False
         super(Gallery, self).__init__(directory, file_extensions, image_alignment, number_of_columns, show_details, uid)
 
     def fetch_files(self):
+        """Returns a list of all files and filenames.
+
+        Returns a list of files and a list of filenames to be used by create_gallery().
+        
+        Returns:
+            all_files (list): A list of files.
+            all_filenames (list): A list of filenames.
+        """
         return super().fetch_files()
 
     @st.cache_resource(experimental_allow_widgets=True, show_spinner="Refreshing gallery...")
     def create_gallery(_self):
+        """Creates a simple gallery with columns.
+
+        Creates a gallery using columns out of streamlit widgets.
+
+        Args:
+            number_of_columns (int): An int() indicating the number of columns to create.
+            show_details (bool): A bool() that when set to True allows the creation of libraries, default is False to create a gallery.
+        
+        Returns:
+            library_container (st.container): A streamlit widget containing the library.
+        """
         return super().create_library(_self.number_of_columns, _self.show_details)
-"""
+'''
 
 with st.sidebar:
     st.info("Welcome to the `streamlit-uploads-library` example app.")

src/streamlit_uploads_library/gallery.py

@@ -2,14 +2,53 @@
 from src.streamlit_uploads_library.library import Library
 
 class Gallery(Library):
+    """Create a simple gallery out of streamlit widgets.
+
+    Using the gallery is simple, import `streamlit_uploads_library` and then instantiate the class with the 
+    required `directory` variable. Other options can be configured by passing in different variables 
+    when instantiating the class.
+
+    Example Usage:
+        python
+        import streamlit as st
+        from streamlit_uploads_library.gallery import Gallery
+
+        st.set_page_config(page_title="Streamlit Uploads Library", layout="wide")
+        default_gallery = Gallery(directory="assets")
+   
+    Args:
+        directory (str): A str() of the path to the folder containing the gallery images, for example, "assets".
+        file_extensions (tuple): A tuple() containing strings of the file extensions to include in the gallery, default is (".png", ".jpg", ".jpeg").
+        number_of_columns (int): An int() defining the number of required columns, default is 5.
+        uid (str): A str() containing a unique identifier allowing you to create multiple galleries on the same page containing the same images.
+    """
     def __init__(self, directory, file_extensions=(".png", ".jpg", ".jpeg"), number_of_columns=5, uid="gallery"):
         image_alignment = "center"
         show_details=False
         super(Gallery, self).__init__(directory, file_extensions, image_alignment, number_of_columns, show_details, uid)
 
     def fetch_files(self):
+        """Returns a list of all files and filenames.
+
+        Returns a list of files and a list of filenames to be used by create_gallery().
+        
+        Returns:
+            all_files (list): A list of files.
+            all_filenames (list): A list of filenames.
+        """
         return super().fetch_files()
 
     @st.cache_resource(experimental_allow_widgets=True, show_spinner="Refreshing gallery...")
     def create_gallery(_self):
+        """Creates a simple gallery with columns.
+
+        Creates a gallery using columns out of streamlit widgets.
+
+        Args:
+            number_of_columns (int): An int() indicating the number of columns to create.
+            show_details (bool): A bool() that when set to True allows the creation of libraries, default is False to create a gallery.
+        
+        Returns:
+            library_container (st.container): A streamlit widget containing the library.
+        """
         return super().create_library(_self.number_of_columns, _self.show_details)