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Ryan Jacob
Courses Plus Student 13,265 PointsCreate a new function named num_courses that will receive the same .
Stuck again on this one. Please help
# The dictionary will look something like:
# {'Andrew Chalkley': ['jQuery Basics', 'Node.js Basics'],
# 'Kenneth Love': ['Python Basics', 'Python Collections']}
#
# Each key will be a Teacher and the value will be a list of courses.
#
# Your code goes below here.
def num_teachers(teachers):
count = 0
for teacher in teachers:
count += 1
return count
def num_courses(teachers):
count = 0
for courses in teachers:
count += 1
return count
2 Answers
Chris Freeman
Treehouse Moderator 68,441 PointsYou are mostly there. The challenge is looking for the total number of courses across all teachers.
When using for courses in teachers:, the value of courses will be the dict keys, not the list of courses. There a couple of fixes available:
# look up the courses and get their lengths:
count += len(teachers[courses])
# use 'values()' to get the actual courses
for courses in teachers.values():
count += len(courses)
Post back if you need more help. Good luck!!
Vlad Bitca
Courses Plus Student 2,702 PointsTry this:
def num_courses(dict):
count = 0
for x in dict:
if isinstance(dict[x], list):
count += len(dict[x])
return(count)
Ryan Jacob
Courses Plus Student 13,265 PointsRyan Jacob
Courses Plus Student 13,265 Pointsthanks.