When I try to debug my code in Jupyter Notebook with %debug I hit the "Oldest frame".
> $HOME/anaconda3/envs/py36/lib/python3.6/site-packages/matplotlib/axes/_base.py(244)_xy_from_xy()
242 if x.shape[0] != y.shape[0]:
243 raise ValueError("x and y must have same first dimension, but "
--> 244 "have shapes {} and {}".format(x.shape, y.shape))
245 if x.ndim > 2 or y.ndim > 2:
246 raise ValueError("x and y can be no greater than 2-D, but have "
ipdb> up
> $HOME/anaconda3/envs/py36/lib/python3.6/site-packages/matplotlib/axes/_base.py(385)_plot_args()
383 x, y = index_of(tup[-1])
384
--> 385 x, y = self._xy_from_xy(x, y)
386
387 if self.command == 'plot':
ipdb> up
> $HOME/anaconda3/envs/py36/lib/python3.6/site-packages/matplotlib/axes/_base.py(407)_grab_next_args()
405 return
406 if len(remaining) <= 3:
--> 407 for seg in self._plot_args(remaining, kwargs):
408 yield seg
409 return
ipdb> up
*** Oldest frame
The problem is the traceback of the exception is much longer:
---------------------------------------------------------------------------
ValueError Traceback (most recent call last)
<ipython-input-52-c0be78c78358> in <module>()
----> 1 _ = plotSensitivity('inverse_corelation_uniform_log_boost_serial_smooth_lite', 1)
<ipython-input-51-c479a5eeae49> in plotSensitivity(dataset, threshold)
75 truePositives * 100,
76 label=method,
---> 77 ls=LS[method[0]])
78
79 plt.xscale('log')
$HOME/anaconda3/envs/py36/lib/python3.6/site-packages/matplotlib/pyplot.py in plot(*args, **kwargs)
3315 mplDeprecation)
3316 try:
-> 3317 ret = ax.plot(*args, **kwargs)
3318 finally:
3319 ax._hold = washold
$HOME/anaconda3/envs/py36/lib/python3.6/site-packages/matplotlib/__init__.py in inner(ax, *args, **kwargs)
1896 warnings.warn(msg % (label_namer, func.__name__),
1897 RuntimeWarning, stacklevel=2)
-> 1898 return func(ax, *args, **kwargs)
1899 pre_doc = inner.__doc__
1900 if pre_doc is None:
$HOME/anaconda3/envs/py36/lib/python3.6/site-packages/matplotlib/axes/_axes.py in plot(self, *args, **kwargs)
1404 kwargs = cbook.normalize_kwargs(kwargs, _alias_map)
1405
-> 1406 for line in self._get_lines(*args, **kwargs):
1407 self.add_line(line)
1408 lines.append(line)
$HOME/anaconda3/envs/py36/lib/python3.6/site-packages/matplotlib/axes/_base.py in _grab_next_args(self, *args, **kwargs)
405 return
406 if len(remaining) <= 3:
--> 407 for seg in self._plot_args(remaining, kwargs):
408 yield seg
409 return
$HOME/anaconda3/envs/py36/lib/python3.6/site-packages/matplotlib/axes/_base.py in _plot_args(self, tup, kwargs)
383 x, y = index_of(tup[-1])
384
--> 385 x, y = self._xy_from_xy(x, y)
386
387 if self.command == 'plot':
$HOME/anaconda3/envs/py36/lib/python3.6/site-packages/matplotlib/axes/_base.py in _xy_from_xy(self, x, y)
242 if x.shape[0] != y.shape[0]:
243 raise ValueError("x and y must have same first dimension, but "
--> 244 "have shapes {} and {}".format(x.shape, y.shape))
245 if x.ndim > 2 or y.ndim > 2:
246 raise ValueError("x and y can be no greater than 2-D, but have "
ValueError: x and y must have same first dimension, but have shapes (5,) and (500,)
Same happens with other packages (e.g. patsy used by statsmodels).
How may I access the frames with my code from the debugger?
Unfortunately I think you have hit a long-standing bug in ipython where it can't debug the call stack up through generators.
See https://github.com/ipython/ipython/issues/6251 for details. I suspect that this is a result of their logic to hide the last frame (which would be inside ipython), but have no hard evidence for that.
Until they fix it, you can work around the problem by using import pdb; pdb.pm() instead of the magic.