以下是一个示例代码，可以按照Python格式输出进行分组：

data = [
    {'name': 'Alice', 'age': 25, 'gender': 'female'},
    {'name': 'Bob', 'age': 30, 'gender': 'male'},
    {'name': 'Charlie', 'age': 35, 'gender': 'male'},
    {'name': 'David', 'age': 40, 'gender': 'male'},
    {'name': 'Emma', 'age': 28, 'gender': 'female'},
    {'name': 'Frank', 'age': 32, 'gender': 'male'},
    {'name': 'Gina', 'age': 27, 'gender': 'female'}
]

# 按照性别进行分组
grouped_data = {}
for item in data:
    gender = item['gender']
    if gender not in grouped_data:
        grouped_data[gender] = []
    grouped_data[gender].append(item)

# 输出分组结果
for gender, group in grouped_data.items():
    print(f'{gender}:')
    for item in group:
        name = item['name']
        age = item['age']
        print(f'  {name}, {age} years old')

输出结果如下所示：

female:
  Alice, 25 years old
  Emma, 28 years old
  Gina, 27 years old
male:
  Bob, 30 years old
  Charlie, 35 years old
  David, 40 years old
  Frank, 32 years old