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      "description": "       6 | for i in range(5):\n       7 |     row = []\n       8 |     result.append(row)\n-->    9 |     print_stack()\n      10 |     for j in range(5):\n```\nThe code for `print_stack()` is fairly self-explanatory. If you want to learn more details about a particular class or method I suggest looking through some docstrings. `FrameInfo` is a class that accepts either a frame or a traceback object and provides a bunch of nice attributes and properties (which are cached so you don't need to worry about performance). In particular `frame_info.lines` is a list of `Line` objects. `line.render()` returns the source code of that line suitable for display. Without any arguments it simply strips any common leading indentation. Later on we'll see a more powerful use for it.\nYou can see that `frame_info.lines` includes some lines of surrounding context. By default it includes 3 pieces of context before the main line and 1 piece after. We can configure the amount of context by passing options:\n```python\noptions = stack_data.Options(before=1, after=0)\nframe_info = stack_data.FrameInfo(frame, options)\n```\nThen the output looks like:\n```",
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