Dynamic breadcrumb navbar with Python.

breadcrumb.py

# initialise the breadcrumb and add link to top-level readme
html += f"""
<!-- Breadcrumb Navigation -->
<nav aria-label="breadcrumb">
    <ol class="breadcrumb">
        <li class="breadcrumb-item active"><a href="../readme.html">Readme</a></li>
"""

# loop through each layer in full path and add each to breadcrumb
for i, layer in enumerate(fullpath):
    # check if we are on the final item
    if i+1 != len(fullpath):
        path = fullpath[:i+1]  # get all items leading to this point
        # format each part to not contain capitals or spaces for file links
        path = [part.lower().replace(" ", "_") for part in path]
        path = ".".join(path) + ".html"  # create the filename
        # add in a hypterlink
        html += f"""
        <li class="breadcrumb-item active"><a href="{path}">{layer}</a></li>
        """
    else:
        # otherwise, no hyperlink as is current page
        html += f"""
        <li class="breadcrumb-item" aria-current="page">{layer}</li>
        """
        
# add ending tags of navbar section
html += """
  </ol>
</nav>
"""