Question

在下面的代码中，我试图从imdb站点中提取一些数据。我正在对存储在csv文件中的标题（tt000001，tt000002等）进行迭代，并将迭代后的值放入地址中我正在使用代理来避免出现连接错误，因此我将代码放在try和except块中，以便在出现任何问题时可以更改代理，并且程序可以继续运行而不会被中断。

for i in sheet2.iter_cols(min_row=2,max_row=diff+2,min_col=1,max_col=1):
    for j in i:
        try:
            print("getting address")
            req=requests.get("https://www.imdb.com/title/"+str(j.value),proxies=pro,headers=headers)
            soup=bs4.BeautifulSoup(req.text,'html.parser')
            x=soup.find('div',class_="title_wrapper")
            list1.append(x.h1.getText())
            print(list1)
        except:
            print("Proxy {} not working, changing it".format(pro))
            pro=oneproxypls()

            headers={'User-Agent':ua.random} 
        else:
            print("Written in the {} successfully".format(j.value))

问题是当遇到错误时，它正在更改代理，但如果下一个代理也不起作用，它会跳过该迭代，有时会重复两次或更多次。所以我的问题是，有什么办法因此，在更改代理后，它不会跳过该迭代。谢谢！！

Answer 1

这需要工作：

private void saveImage() {

        if (requestPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE)) {
            showLoading("Saving...");

            filename = String.valueOf(System.currentTimeMillis()) + ".png";
            File file = new File(Environment.getExternalStorageDirectory()
                    + File.separator + "/" + getResources().getString(R.string.app_name));

            try {
                if (!file.exists())
                    file.mkdir();

                file.createNewFile();
                if (ActivityCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
                    // TODO: Consider calling
                    //    ActivityCompat#requestPermissions
                    // here to request the missing permissions, and then overriding
                    // public void onRequestPermissionsResult(int requestCode, String[] permissions,
                    //                                          int[] grantResults)
                    // to handle the case where the user grants the permission. See the documentation
                    // for ActivityCompat#requestPermissions for more details.
                    return;
                }
                mPhotoEditor.saveAsFile(file.getAbsolutePath() + "/" + filename, new PhotoEditor.OnSaveListener() {
                    @Override
                    public void onSuccess(@NonNull String imagePath) {
                        hideLoading();
                        showSnackbar("Image Saved Successfully");
                        MediaScannerConnection.scanFile(EditImageActivity.this, new String[]{file.toString()}, null,
                                new MediaScannerConnection.OnScanCompletedListener() {
                                    public void onScanCompleted(String path, Uri uri) {
                                        Log.i("ExternalStorage", "Scanned " + path + ":");
                                        Log.i("ExternalStorage", "-> uri=" + uri);
                                    }
                                });
                        Log.e(".provider", " : " + getPackageName() + ".provider");
                        Log.e("filepath", " : " + imagePath);
                        if (imagePath != null && !imagePath.isEmpty()) {

                            File file1 = new File(imagePath);
                            Log.e("file1", " : " + file1);

                            if (file1 != null) {
                                Uri imageUri = FileProvider.getUriForFile(
                                        EditImageActivity.this,
                                        getPackageName() + ".fileprovider", //(use your app signature + ".provider" )
                                        file1);
                                mPhotoEditorView.getSource().setImageURI(imageUri);
                                Log.e("imageUri", " : " + imageUri);

                            }
                        }
                    }

                    @Override
                    public void onFailure(@NonNull Exception exception) {
                        hideLoading();
                        showSnackbar("Failed to save Image");
                    }
                });
            } catch (IOException e) {
                e.printStackTrace();
                hideLoading();
                showSnackbar(e.getMessage());
            }
        }

如果继续操作不起作用，请尝试通过

尝试并缓存遇到错误的for循环跳过迭代

1 个答案: