code: def detect_flask_apps():
      
  
      matches = []
      for root, dirnames, filenames in os.walk(os.getcwd()):
          for filename in fnmatch.filter(filenames, '*.py'):
              full = os.path.join(root, filename)
              if 'site-packages' in full:
                  continue
  
              full = os.path.join(root, filename)
  
              with io.open(full, 'r', encoding='utf-8') as f:
                  lines = f.readlines()
                  for line in lines:
                      app = None
  
                      # Kind of janky..
                      if '= Flask(' in line:
                          app = line.split('= Flask(')[0].strip()
                      if '=Flask(' in line:
                          app = line.split('=Flask(')[0].strip()
  
                      if not app:
                          continue
  
                      package_path = full.replace(os.getcwd(), '')
                      package_module = package_path.replace(os.sep, '.').split('.', 1)[1].replace('.py', '')
                      app_module = package_module + '.' + app
  
                      matches.append(app_module)
  
      return matches
docs: Automatically try to discover Flask apps files,
      return them as relative module paths.