如何从Python字典指定分组中获取多个随机值生成健身训练组

• random.sample()传参错误：你代码中调用了.items()方法，但musclegroup_exercises中每个肌群对应的值是集合类型，只有字典才有items()方法，直接传入动作集合本身即可
• 函数逻辑未完成：createworkout2仅写了前半段，没有实现第二个肌群的动作抽取、结果汇总输出逻辑
• 单肌群训练函数未实现随机抽取：现有createworkout1会输出对应肌群的所有动作，不符合随机选动作的需求
• 随机库导入位置不合理：放在函数内部会导致每次调用函数都重复执行导入操作

import random

musclegroup_exercises = {
    'legs': {"squat", "calf raises", "hamstring curls", "deadlifts", "walking lunges"},
    'chest': {"barbell bench", "pushups", "cable fly", "dumbbell fly", "dumbbell incline bench press"},
    'arms': {"bicep curls", "kickbacks", "tricep pushdown", "reverse curls", "hammer curl"},
    'shoulders':{"shoulder press", "lateral raise", "barbell shrug", "bent over reverse flys", "push press"},
    'back':{"dumbbell rows", "back extension", "pull ups", "lat pull downs", "machine seated row"},
    'core':{"sit ups", "crunches", "russian twists", "bicycles", "planks"},
}

print('可选目标肌群：Legs, Chest, Arms, Shoulders, Back, Core')
print('可选强度等级：Easy, Medium, Hard')

# 输入校验
while True:
    try:
        num = int(input('请选择训练的目标肌群数量（1或2）：'))
        if num in (1,2):
            break
        print('请输入1或2')
    except ValueError:
        print('请输入有效数字')

target_groups = []
if num == 1:
    while True:
        musclegroup = input('请输入目标肌群名称：').lower()
        if musclegroup in musclegroup_exercises:
            target_groups.append(musclegroup)
            break
        print('输入的肌群不存在，请重新输入')
else:
    while len(target_groups) < 2:
        tip = '请输入第一个目标肌群名称：' if len(target_groups) == 0 else '请输入第二个目标肌群名称：'
        mg = input(tip).lower()
        if mg in musclegroup_exercises and mg not in target_groups:
            target_groups.append(mg)
        elif mg in target_groups:
            print('该肌群已选择，请输入其他肌群')
        else:
            print('输入的肌群不存在，请重新输入')

while True:
    intensity = input('请选择强度等级：').capitalize()
    if intensity in ('Easy', 'Medium', 'Hard'):
        break
    print('请输入有效强度等级：Easy/Medium/Hard')

rate_map = {'Easy':'65%', 'Medium':'80%', 'Hard':'90%'}
rate = rate_map[intensity]

# 生成训练计划
workout = []
for group in target_groups:
    # 每个肌群随机抽3个动作
    exercises = random.sample(list(musclegroup_exercises[group]), 3)
    workout.extend(exercises)

print(f'\n你的专属训练计划（强度对应负荷：{rate}）：')
for idx, act in enumerate(workout, 1):
    print(f'{idx}. {act}')

• 增加了全流程输入校验，避免用户输入无效值导致程序崩溃
• 修复了random.sample的传参错误，先将动作集合转为列表再传入即可完成随机抽取
• 简化了训练计划生成逻辑，兼容1个/2个肌群的场景，无需写两个独立函数
• 优化了输出格式，按序号展示训练动作，同时标注对应强度的负荷参考值

内容的提问来源于stack exchange，提问作者Fernando Toledo