for a in dat0: schoolid = a['school_id'] print(schoolid) schoolname = a['name'] url1 = 'https://static-data.gaokao.cn/www/2.0/school/' + schoolid + '/info.json' #print("正在下载" + schoolname) html1 = requests.get(url1).text dict1 = json.loads(html1) # 将string转化为dict #print(dict1) if len(dict1) != 0: dat1 = dict1["data"] name = dat1["name"] content = dat1["content"] f985 = dat1["f985"] if f985 == "1": f985 = "是" else: f985 = "否" f211 = dat1["f211"] if f211 == "1": f211 = "是" else: f211 = "否" ruanke_rank = dat1["ruanke_rank"] if ruanke_rank == '0': ruanke_rank = '' type_name = dat1["type_name"] school_nature_name = dat1["school_nature_name"] province_name = dat1["province_name"] city_name = dat1["city_name"] address = dat1["address"] special = [] for j in dat1["special"]: special.append(j["special_name"]) pro_type_min = dat1["pro_type_min"] fen2022 = '' fen2021 = '' fen2020 = '' for k in pro_type_min.keys(): print(k) print(x["name"]) if int(k) == x["name"]: print(pro_type_min[k]) for m in pro_type_min[k]:

这是一段 Python 代码，但是您并没有提出问题。请问您需要我帮您分析这段代码的作用吗？这段代码的主要作用是爬取高校信息，包括高校名称、内容、是否为 985/211 高校、软科排名、类型、学校性质、省份名称、城市名称、地址、专业等级分数线。其中，通过循环遍历获取专业等级的分数线，并根据指定的条件进行筛选。

相关问题

for i in schoolid1_list: if i not in schoolid2_List: user_Messager.loc[user_Messager['用户名'] == i, '排名'] = -1

你的第一个问题是关于 Python 代码的。这段代码的作用是什么？

这段代码的作用是将 `schoolid1_list` 中的元素与 `schoolid2_List` 中的元素进行比较，如果 `schoolid1_list` 中的元素不在 `schoolid2_List` 中，则将 `user_Messager` 数据框中 `'用户名'` 列等于该元素的行的 `'排名'` 列赋值为 -1。换句话说，它是用来标记 `user_Messager` 中不在 `schoolid2_List` 中的用户的排名。

ProgramModelEntities = _migrateRepository.GetAllWithNoTrackingAsync<ProgramModelEntity>().ToList(); Programmes = ProgramModelEntities.Select(program => { CProgramme p = new CProgramme() { Id = new Guid(program.Id), Name = program.Name, SchoolId = SQIConstants.SYS_School_ID, Description = program.Description, CreatedById = String.IsNullOrEmpty(program.CreatedBy) ? new Guid("e306ca07-a21b-40fd-935a-343cfe369001") : new Guid(program.CreatedBy), CreatedTime = program.CreatedOn == null ? new DateTime().Ticks : program.CreatedOn.Value.Ticks, ModifiedById = String.IsNullOrEmpty(program.ModifiedBy) ? new Guid("e306ca07-a21b-40fd-935a-343cfe369001") : new Guid(program.ModifiedBy), ModifiedTime = program.ModifiedOn == null ? new DateTime().Ticks : program.ModifiedOn.Value.Ticks, Duration = 1 }; if (!String.IsNullOrEmpty(program.ProgramAdmins)) { var admins = program.ProgramAdmins.Split(";"); ResourceAccesses.Add(admins.Select(admin => new CResourceAccess() { Id = Guid.NewGuid(), UserId = new Guid(admin), RoleType = RoleType.ProgrammeAdmin, ResourceId = new Guid(program.Id), ResourceLevel = ResourceLevel.Programme } ).ToList()); } ResourcesList.Add(new CResources { Id = new Guid(program.Id), ResourceLevel = ResourceLevel.Programme, SchoolId = SQIConstants.SYS_School_ID, ProgrammeId = new Guid(program.Id), }); return p; } ).ToList(); 优化下这段代码

以下是对这段代码的一些优化建议：

1. 使用异步方法来获取数据，可以提高性能。例如，可以使用 `ToListAsync()` 替代 `ToList()`。

2. 使用 LINQ 的 Select 方法来进行对象的转换，可以让代码更简洁易读。例如，可以使用如下的代码替代 `ProgramModelEntities.Select()`：

Programmes = await _migrateRepository.GetAllWithNoTrackingAsync<ProgramModelEntity>()
    .Select(program => new CProgramme
    {
        Id = new Guid(program.Id),
        Name = program.Name,
        SchoolId = SQIConstants.SYS_School_ID,
        Description = program.Description,
        CreatedById = String.IsNullOrEmpty(program.CreatedBy)
            ? new Guid("e306ca07-a21b-40fd-935a-343cfe369001")
            : new Guid(program.CreatedBy),
        CreatedTime = program.CreatedOn?.Ticks ?? new DateTime().Ticks,
        ModifiedById = String.IsNullOrEmpty(program.ModifiedBy)
            ? new Guid("e306ca07-a21b-40fd-935a-343cfe369001")
            : new Guid(program.ModifiedBy),
        ModifiedTime = program.ModifiedOn?.Ticks ?? new DateTime().Ticks,
        Duration = 1
    })
    .ToListAsync();

3. 对于资源列表和资源访问列表的操作，可以使用 LINQ 的 SelectMany 方法和 Where 方法来替代 foreach 循环。例如，可以使用如下的代码替代 `if (!String.IsNullOrEmpty(program.ProgramAdmins))` 和 `ResourcesList.Add()`：

var programmeAdmins = program.ProgramAdmins?.Split(';');

if (programmeAdmins?.Any() == true)
{
    ResourceAccesses.AddRange(programmeAdmins
        .Select(admin => new CResourceAccess
        {
            Id = Guid.NewGuid(),
            UserId = new Guid(admin),
            RoleType = RoleType.ProgrammeAdmin,
            ResourceId = new Guid(program.Id),
            ResourceLevel = ResourceLevel.Programme
        }));
}

ResourcesList.AddRange(programmeAdmins?.Select(admin => new CResources
{
    Id = new Guid(program.Id),
    ResourceLevel = ResourceLevel.Programme,
    SchoolId = SQIConstants.SYS_School_ID,
    ProgrammeId = new Guid(program.Id),
}) ?? Enumerable.Empty<CResources>());

综上所述，以下是经过优化后的代码：

Programmes = await _migrateRepository.GetAllWithNoTrackingAsync<ProgramModelEntity>()
    .Select(program => new CProgramme
    {
        Id = new Guid(program.Id),
        Name = program.Name,
        SchoolId = SQIConstants.SYS_School_ID,
        Description = program.Description,
        CreatedById = String.IsNullOrEmpty(program.CreatedBy)
            ? new Guid("e306ca07-a21b-40fd-935a-343cfe369001")
            : new Guid(program.CreatedBy),
        CreatedTime = program.CreatedOn?.Ticks ?? new DateTime().Ticks,
        ModifiedById = String.IsNullOrEmpty(program.ModifiedBy)
            ? new Guid("e306ca07-a21b-40fd-935a-343cfe369001")
            : new Guid(program.ModifiedBy),
        ModifiedTime = program.ModifiedOn?.Ticks ?? new DateTime().Ticks,
        Duration = 1
    })
    .ToListAsync();

var programmeResources = Programmes.SelectMany(programme => new[]
{
    new CResources
    {
        Id = programme.Id,
        ResourceLevel = ResourceLevel.Programme,
        SchoolId = SQIConstants.SYS_School_ID,
        ProgrammeId = programme.Id
    }
});

var programmeAdminResources = Programmes.SelectMany(programme =>
{
    var programmeAdmins = programme.ProgramAdmins?.Split(';');
    
    return programmeAdmins?.Select(admin => new CResourceAccess
    {
        Id = Guid.NewGuid(),
        UserId = new Guid(admin),
        RoleType = RoleType.ProgrammeAdmin,
        ResourceId = programme.Id,
        ResourceLevel = ResourceLevel.Programme
    }) ?? Enumerable.Empty<CResourceAccess>();
});

ResourcesList.AddRange(programmeResources);
ResourceAccesses.AddRange(programmeAdminResources);