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Python Python Collections (Retired) Dictionaries Teacher Stats

Hunter G
Hunter G
6,612 Points

Teacher Stats Challenge. Why do you assign teacher variable to "" ?

Below is the correct code for Task 1 of this Challenge which I resourced from another forum post. My question though is why do you assign teacher to the double quotes? What exactly is that doing?

teachers.py
# The dictionary will be something like:
# {'Jason Seifer': ['Ruby Foundations', 'Ruby on Rails Forms', 'Technology Foundations'],
#  'Kenneth Love': ['Python Basics', 'Python Collections']}
#
# Often, it's a good idea to hold onto a max_count variable.
# Update it when you find a teacher with more classes than
# the current count. Better hold onto the teacher name somewhere
# too!
#
# Your code goes below here.
def most_classes(my_dict):
  count = 0
  teacher = ""
  for key in my_dict:
    if (len(my_dict[key]) > count):
      count = len(my_dict[key])
      teacher = key

  return teacher

1 Answer

David Diehr
David Diehr
16,457 Points

So I just checked, and this code passes the challenge without that line. This just establishes the variable as an empty string. Sometimes people just establish empty variables at the beginning of a function to help guide their thinking about how they're gonna write the function. In some cases you establish an empty string so you can concatenate that variable later on even if it's empty (obviously, not the case here) just like you might establish an empty array or object so you can append it later.

Hunter G
Hunter G
6,612 Points

Ahh, an empty string. Thank makes much sense! Thank you for your explanation David!! :)