input: def print_grade_table(students):
      max_name_length = max(len(student['name']) for student in students)
      line_template = "{{name:<{max_name_length}}}   {{grade}}".format(max_name_length=max_name_length)
      header = line_template.format(name='Name', grade='Grade')
      sep = '-' * len(header)
      print(header)
      print(sep)
      for student in students:
          print(line_template.format(**student))
      """
      Print a formatted table of grades for a given set of students.
      >>> print_grade_table([
      ...     {
      ...     'name': "John",
      ...     'grade': 92
      ...     },
      ...     {
      ...     'name': "Alice",
      ...     'grade': 95
      ...     },
      ...     {
      ...     'name': "Bob",
      ...     'grade': 87
      ...     }
      ... ])
      Name    Grade
      ----   ----
      John    92
      Alice   95
      Bob     87
      """
output:     for student in students:
          print(line_template.format(**student))