IndexError when saving

[Lucas Alber]

Using tikzplotlib for contourf sometimes leads to:

  File "D:\Local_Repositories\Studium\Semester_7\bachelorarbeit\code\env\lib\site-packages\tikzplotlib\_save.py", line 260, in save
    code = get_tikz_code(*args, filepath=filepath, **kwargs)
  File "D:\Local_Repositories\Studium\Semester_7\bachelorarbeit\code\env\lib\site-packages\tikzplotlib\_save.py", line 209, in get_tikz_code
    data, content = _recurse(data, figure)
  File "D:\Local_Repositories\Studium\Semester_7\bachelorarbeit\code\env\lib\site-packages\tikzplotlib\_save.py", line 353, in _recurse
    data, children_content = _recurse(data, child)
  File "D:\Local_Repositories\Studium\Semester_7\bachelorarbeit\code\env\lib\site-packages\tikzplotlib\_save.py", line 378, in _recurse
    data, cont = _draw_collection(data, child)
  File "D:\Local_Repositories\Studium\Semester_7\bachelorarbeit\code\env\lib\site-packages\tikzplotlib\_save.py", line 319, in _draw_collection
    return _path.draw_pathcollection(data, child)
  File "D:\Local_Repositories\Studium\Semester_7\bachelorarbeit\code\env\lib\site-packages\tikzplotlib\_path.py", line 214, in draw_pathcollection
    p = obj.get_paths()[0]
IndexError: list index out of range

A solution is to check here:

tikzplotlib/tikzplotlib/_path.py

Lines 212 to 228 in 1b9139c

 # "solution" from 
 # <https://github.com/matplotlib/matplotlib/issues/4672#issuecomment-378702670> 
 p = obj.get_paths()[0] 
 ms = {style: MarkerStyle(style) for style in MarkerStyle.markers} 
 paths = { 
     style: marker.get_path().transformed(marker.get_transform()) 
     for style, marker in ms.items() 
 } 
 marker0 = None 
 for marker, path in paths.items(): 
     if ( 
         np.array_equal(path.codes, p.codes) 
         and (path.vertices.shape == p.vertices.shape) 
         and np.max(np.abs(path.vertices - p.vertices)) < 1.0e-10 
     ): 
         marker0 = marker 
         break 

if get_paths() returns an empty list and in this case setting marker0 = None.