Welcome to the Treehouse Community
Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.
Looking to learn something new?
Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.
Start your free trialyannis sousanis
7,199 Pointsneed help
when I run this program i get 2 list in one [['jQuery Basics', 'Node.js Basics'], ['Python Basics', 'Python Collections']] do I have to unpack this to return a single list?
# 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(a):
return len(a)
def num_courses(dic):
number = 0
for v in dic.values():
number += len(v)
return number
def courses(dic):
course_list = []
for v in dic.values():
course_list.append(v)
return course_list
1 Answer
Jordan Hoover
Python Web Development Techdegree Graduate 59,268 PointsJust loop one more time, or combine it with a comprehension.
for teacher_courses in dic.values():
for course in teacher_courses:
course_list.append(course)