jinja2.exceptions.TemplateNotFound: when use include function in template

[so77id]

I am trying to use this package without using any specific framework, and I am trying to create a template for a markdown file. Everything works fine when using a file as a template, but when using the include function within the template to call another file, it is giving me the error: jinja2.exceptions.TemplateNotFound

Template Code

template.md

# This is Markdown file
{% if a == True %}
  {% include './a.md' %}
{% else %}
  {% include './b.md' %}
{% endif %}
"""

a.md

this is a.md

b.md

this is b.md

example.py

from jinja2 import Environment, BaseLoader

with open('./template.md', 'r') as reader:
    file = reader.read()

template = Environment(loader=BaseLoader()).from_string(file)
render = template.render({"a": True})	

Full Traceback

  File "example.py", line 7, in <module>
    render = template.render({"a": True})
  File ".virtualenvs/cv3/lib/python3.6/site-packages/jinja2/asyncsupport.py", line 76, in render
    return original_render(self, *args, **kwargs)
  File ".virtualenvs/cv3/lib/python3.6/site-packages/jinja2/environment.py", line 1008, in render
    return self.environment.handle_exception(exc_info, True)
  File ".virtualenvs/cv3/lib/python3.6/site-packages/jinja2/environment.py", line 780, in handle_exception
    reraise(exc_type, exc_value, tb)
  File ".virtualenvs/cv3/lib/python3.6/site-packages/jinja2/_compat.py", line 37, in reraise
    raise value.with_traceback(tb)
  File "<template>", line 4, in top-level template code
  File ".virtualenvs/cv3/lib/python3.6/site-packages/jinja2/loaders.py", line 91, in get_source
    raise TemplateNotFound(template)
jinja2.exceptions.TemplateNotFound: a.md

Environment

• Python version: Python 3.6.0
• Jinja version: 2.10

[ThiefMaster]

You need to use a FileSystemLoader (or any other loader that actually knows how to load a template given a name) if you want to reference other templates.

Also, please use IRC or Stack Overflow for this kind of question.