title: How to reference handlers in sub-directories in serverless-offline?
body: <blockquote>
    <p>Windows 10 64bits</p>
    
    <p>Node v12.16.3 </p>
    
    <p>Serverless 1.71.3</p>
    
    <p>serverless-offline 6.1.7</p>
  </blockquote>
  
  <p><strong>DIRECTORY</strong>:</p>
  
  <pre><code>root:
  - package.json
  - /sub
  -- __init__.py
  -- sub_handler.py
  - ...
  - handler.py
  - serverless.yml
  </code></pre>
  
  <p>Hi, I'm currently trying to test locally two lambda functions using serverless-offline.
  It's working for the handler in the root directory <strong>but it seems that serverless-offline can't reference other handlers in sub-directories</strong>..</p>
  
  <p><strong>How can I reference handlers in a sub-directory?</strong></p>
  
  <p>PS: This configuration works when deployed to AWS LAMBDA. I can post both paths.</p>
  
  <p><strong>Error when I try to post hello2:</strong></p>
  
  <blockquote>
    <p>[offline] Loading handler...
    (C:\Users\my_user\Desktop\serverless-offline\sub\sub_handler)
    Traceback (most recent call last):<br>
        File C:\Users\my_user\Desktop\serverless-offline\node_modules\serverless-offline\dist\lambda\handler-runner\python-runner\invoke.py",
    line 75, in </p>
  
  <pre><code>    module = import_module(args.handler_path.replace('/', '.'))
  File "C:\Users\my_user\AppData\Local\Programs\Python\Python36\lib\importlib\__init__.py",
  </code></pre>
    
    <p>line 126, in import_module
            return _bootstrap._gcd_import(name[level:], package, level)
        File "", line 994, in _gcd_import</p>
  
  <pre><code>File "&lt;frozen importlib._bootstrap&gt;", line 971, in _find_and_load   
  File "&lt;frozen importlib._bootstrap&gt;", line 953, in _find_and_load_unlocked
  </code></pre>
    
    <p>ModuleNotFoundError: No module named 'sub\sub_handler'</p>
  </blockquote>
  
  <p><strong>serverless.yml</strong>:</p>
  
  <pre><code>service: sls-offline-test    
  provider:
    name: aws
    runtime: python3.6
    memorySize: 256
    stage: ${opt:stage, 'dev'}
    region: us-east-1
    environment:
      STAGE: ${self:provider.stage}    
  functions:
    hello:
      handler: handler.hello
      events:
        - http:
            path: hello
            method: POST
    hello2:
      handler: sub/sub_handler.hello2
      events:
        - http:
            path: 'hello2'
            method: POST    
  package:
    individually: true    
    include:
      - sub/**
  plugins:
    - serverless-offline
  </code></pre>