%matplotlib inline ValueError - python-2.7

Question

When I use %matplotlib inline in my program, I get a ValueError. What does this error mean, and how can I resolve it?
Here is the error:
Traceback (most recent call last):
File "main.py", line 40, in <module>
ct.iloc[:-1,:-1].plot(kind='bar',stacked=True,color=['red','blue'],grid='false')
File "/usr/lib/python2.7/dist-packages/pandas/tools/plotting.py", line 1735, in plot_frame
plot_obj.generate()
File "/usr/lib/python2.7/dist-packages/pandas/tools/plotting.py", line 907, in generate
self._adorn_subplots()
File "/usr/lib/python2.7/dist-packages/pandas/tools/plotting.py", line 1012, in _adorn_subplots
ax.grid(self.grid)
File "/usr/lib/pymodules/python2.7/matplotlib/axes.py", line 2176, in grid
b = _string_to_bool(b)
File "/usr/lib/pymodules/python2.7/matplotlib/axes.py", line 54, in _string_to_bool
raise ValueError("string argument must be either 'on' or 'off'")
ValueError: string argument must be either 'on' or 'off'

Answer 1

When asking a question you should follow these guidlines: https://stackoverflow.com/help/mcve
instead of just posting a traceback.
That said tracebacks can be very useful and following yours you'll be able to figure out the problem.
Using the final line of your traceback can be very useful. One of the string arguments you are passing should only be 'on' or 'off'. Based on this we can then look at the grid option as this is a boolean option.
I tested this like so:
%matplotlib inline
import matplotlib.pyplot as plt
plt.plot([23,4],[4,6])
plt.grid('false')
giving the same error you got.
To fix this you should use either grid = 'off' or grid = False as options. In my example above I would change that to plt.grid('off')