input: from typing import List
  
  def generate_pattern() -> List[str]:
      """
      Generate a pattern consisting of alternating '#' and empty spaces based on the condition (i + j) % 2 == 0.
      The pattern is generated for a grid of 7x7.
      
      >>> generate_pattern()
      ['#######', '       ', '#######', '       ', '#######', '       ', '#######']
      """
      pattern = []
      for i in range(7):
          row = ''
          for j in range(7):
              if (i + j) % 2 == 0:
                  row += '#'
              else:
                  row += ' '
          pattern.append(row)
      return pattern
output:     pattern = []
      for i in range(7):
          row = ''
          for j in range(7):
              if (i + j) % 2 == 0:
                  row += '#'
              else:
                  row += ' '
          pattern.append(row)
      return pattern