Question

我有一个包含许多行的文本文件。我需要在Python中向每行附加一个文本。

这是一个例子：

之前的文字：

public class MainActivity extends AppCompatActivity {

    private static final int REQUEST_CODE = 1;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        WallpaperManager wm = WallpaperManager.getInstance(this);

        Drawable drawable = getResources().getDrawable(R.drawable.mydrawable);
        Bitmap bitmap = drawableToBitmap(drawable);
        Log.i(getClass().getName(), "bitmap = " +bitmap);
        try {
            wm.setBitmap(bitmap);
        } catch (IOException e) {
            e.printStackTrace();
        }
        Toast.makeText(this, "Wallpaper changed",
                Toast.LENGTH_LONG).show();



    }



    public static Bitmap drawableToBitmap (Drawable drawable) {
        Bitmap bitmap = null;

        if (drawable instanceof BitmapDrawable) {
            BitmapDrawable bitmapDrawable = (BitmapDrawable) drawable;
            if(bitmapDrawable.getBitmap() != null) {
                return bitmapDrawable.getBitmap();
            }
        }

        if(drawable.getIntrinsicWidth() <= 0 || drawable.getIntrinsicHeight() <= 0) {
            bitmap = Bitmap.createBitmap(1, 1, Bitmap.Config.ARGB_8888); // Single color bitmap will be created of 1x1 pixel
        } else {
            bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight(), Bitmap.Config.ARGB_8888);
        }

        Canvas canvas = new Canvas(bitmap);
        drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
        drawable.draw(canvas);
        return bitmap;
    }
}

修改了文字：

car
house
blog

Answer 1

如果您只想在每一行上附加word，这样就可以了。

file_name = 'YOUR_FILE_NAME.txt' #Put here your file

with open(file_name,'r') as fnr:
    text = fnr.readlines()

text = "".join([line.strip() + ': [word]\n' for line in text])

with open(file_name,'w') as fnw:
    fnw.write(text)

但是有很多方法可以做到这一点

Answer 2

阅读列表中的文字：

f = open("filename.dat")
lines = f.readlines()
f.close()

追加文字：

new_lines = [x.strip() + "text_to_append" for x in lines]  
# removes newlines from the elements of the list, appends 
# the text for each element of the list in a list comprehension

编辑：对于completness，一个更加pythonic的解决方案，将文本写入新文件：

with open('filename.dat') as f:
    lines = f.readlines()
new_lines = [''.join([x.strip(), text_to_append, '\n']) for x in lines]
with open('filename_new.dat', 'w') as f:
    f.writelines(new_lines)

在Python中的每行txt中附加文本

2 个答案: