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 trial

Python Python Collections (2016, retired 2019) Dictionaries Teacher Stats

Posted by Ryan Jacob
Ryan Jacob
Courses Plus Student 13,265 Points

Challenge Task 1 of 5

Hi There

I am stuck on this one. metal block

teachers.py 
# 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(arg):
arg = {'Andrew Chalkley': ['jQuery Basics', 'Node.js Basics'],'Kenneth Love': ['Python Basics', 'Python Collections']}
    for key in arg.keys():
    return key

2 Answers

Steven Parker
Steven Parker
229,744 Points
Steven Parker
Steven Parker
229,744 Points

Here's a few hints:

  • you won't need to define the arg, it will be passed in by the challenge
  • you won't need a loop
  • you only need to return the number of keys, not any specific one(s)
Ryan Jacob
PLUS
Ryan Jacob
Courses Plus Student 13,265 Points
Ryan Jacob
Ryan Jacob
Courses Plus Student 13,265 Points

thanks