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
Moses Lagoon
Courses Plus Student 660 PointsNot sure how to make this work.
You can check for dictionary membership using the
"key in dict" syntax from lists.
Example
my_dict = {'apples': 1, 'bananas': 2, 'coconuts': 3}
my_list = ['apples', 'coconuts', 'grapes', 'strawberries']
members(my_dict, my_list) => 2
def members(d, l):
# You can check for dictionary membership using the
# "key in dict" syntax from lists.
### Example
# my_dict = {'apples': 1, 'bananas': 2, 'coconuts': 3}
# my_list = ['apples', 'coconuts', 'grapes', 'strawberries']
# members(my_dict, my_list) => 2
def members(d, l):
3 Answers
Jeremy Hill
29,567 PointsHere is the code that passed for me:
def members(dict_map, key_list):
count = 0
for item in dict_map:
for key in key_list:
if key == item:
count += 1
return count
Avani Agrawal
1,638 PointsMoses, This worked for me-
my_dict = {'apples': 1, 'bananas': 2, 'coconuts': 3}
my_list = ['apples', 'coconuts', 'grapes', 'strawberries']
def members(my_dict, my_list):
counter = 0
for item in my_list:
for key in my_dict:
if key==item:
counter += 1
return counter
Jeremy Hill
29,567 PointsJeremy Hill
29,567 PointsThe reason why I named my parameter "dict_map" is because in java (which is what I'm used to) these are called maps, not dictionaries; It helps me remember the structure of dicts.