我在 Mac 上使用 Playground 以编程方式创建了一个模型，但该模型没有更新参数。有人能够创建可更新的模型吗？我没有看到任何 API 更改可以做到这一点。
使用 Catalina 和 Xcode 11 beta 3 创建模型，但当将模型拉入项目时，生成的类不会将模型显示为可更新。
if let dataTable = try? MLDataTable(dictionary: priorityData) {
let (trainingCSVData, testCSVData) = dataTable.randomSplit(by: 0.8, seed: 0)
print( "Training Data = " + trainingCSVData.description)
do {
let deleteProbabilityClassifier = try MLClassifier(trainingData: dataTable, targetColumn: "DeleteProbability")
// evaluate it
let metrics = deleteProbabilityClassifier.evaluation(on: testCSVData)
let modelMetadata = MLModelMetadata(author: "Me", shortDescription: "Model for DeleteProbability Prediction", version: "1.1")
let modelPath = homeDirURL.appendingPathComponent(name + "-deleteProbabilityPredictor.mlmodel", isDirectory: false)
do {
try deleteProbabilityClassifier.write(to: …我正在尝试在我的Mac上安装cocoapods以用于iOS应用程序.所以在找到cocoapod教程之前,我可能已经尝试过为一个xcode项目pod init和其他一些随机的东西安装cocoapod .我认为没有用,pod init但另一个类似的命令做了些什么
然后我决定从一开始就遵循教程是一个更好的主意,所以我开始安装cocoapods sudo gem install cocoapods,其中有效.
但是,当我键入时pod setup --verbose,终端抛出了一个错误,这也是我打字时发生的pod setup
/Library/Ruby/Gems/2.3.0/gems/cocoapods-1.5.3/lib/cocoapods/command.rb:118:in `git_version': Failed to extract git version from `git --version` ("xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun\n") (RuntimeError)
from /Library/Ruby/Gems/2.3.0/gems/cocoapods-1.5.3/lib/cocoapods/command.rb:130:in `verify_minimum_git_version!'
from /Library/Ruby/Gems/2.3.0/gems/cocoapods-1.5.3/lib/cocoapods/command.rb:49:in `run'
from /Library/Ruby/Gems/2.3.0/gems/cocoapods-1.5.3/bin/pod:55:in `<top (required)>'
from /usr/local/bin/pod:22:in `load'
from /usr/local/bin/pod:22:in `<main>'
请帮忙,我在stackoverflow或任何其他网站上找不到任何答案.