Unfortunately this project has moved to a new platform, which does not give assertion errors, so this will not work.
This new platform gives very little information about the last error, but you can use the information in this thread:
https://forum.freecodecamp.org/t/scientific-computing-with-python-projects-budget-app/677107/5
This is the expected output:
Percentage spent by category\n100| \n 90| \n 80| \n 70| o \n 60| o \n 50| o \n 40| o \n 30| o \n 20| o o \n 10| o o \n 0| o o o \n ----------\n B F E \n u o n \n s o t \n i d e \n n r \n e t \n s a \n s i \n n \n m \n e \n n \n t
Print your chart like this to see the raw string output to compare:
print(repr(chart))