'Python for Everybody' Chapter 9 - Dictionaries (Solved Exercises)

Here is the code for the solutions:

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[fome]

Fully appreciate this tutorial, I was stuck yet so close. You simplified it so well

[JW-muoh]

Thank you for simplifying this. Even though I understand the commands and what they do, I get so confused on the order in which things need to come together.

Grateful for your channel!

[AJMcPanda]

So good, you really know how to simplify.

For the fifth exercise I created a variable that found the index of @ and then another variable that deleted everything before the @ and returned the result. So much more complicated.

[sliceofshelby]

Thank you so so so much, this helped me understand the entire chapter. I’ll def come to your videos for help in the future ❤️❤️

[roshanrai]

Thanks man. Helped a lot. Keep it up 👍

[moviemania]

Excercise 2 Solution:
import string

user_file = input("Enter the name of the file: ")
fhand = open(user_file)

try:
fhand = open(user_file)

except:
print("File cannot be opened!", fhand)
exit()

counts = dict()

for line in fhand:
line.rstrip()
line.translate(line.maketrans('', '', string.punctuation))

if "From" not in line:
continue
elif "From:" in line:
continue
else:
words = line.split()
words = words[2]

if words == "Sat" or words == "Fri" or words == "Thu":
counts[words] = counts.get(words, 0) + 1

print(counts)

[gaurangruparelia]

Thanks a lot for this!! Are you using atom to solve?? If so what packages have you installed/recommend installing besides the terminal package??

[kerimthedream]

@aksonai at Exercise 9_3 (12:00), even though we are using a dictionary to get the histogram of emails, I always get the emails represented in the same order no matter how many times I run the code. Why is that?

[markkennedy]

at 17:30 why is it necessary to initialise k as None outside the for loop: Aren't we initialising it as max_address in the for loop. Or is it just in case we have an empty dictionary?

Also, for question 4, say if we had more than one key with a max value of 5 in the dictionary, how would we get all those keys. I think this code only returns the first key with the maximum value.

I noticed this when trying to get the min values (where there are several keys in the dictionary with values of 1) and haven't yet found a solution for getting all those keys with minimum values. Any ideas? Convert the dictionary to a sorted tuple and go from there?

[realtd]

nice and clear explanation just maybe to long names for the variables :)

[Tdav]

Do you have a solution for Exercise 1? Thanks.

[deng_mapeer]

i have solved the work on exercise 4 chapter 9, am stuck in printing how many messages the person has

[stevenfischer]

whoever you are I could kiss you right now, I was stuck on thi for so long. You are amazing! THank you so much

[gaurangruparelia]

Thanks a lot for this!! Are you using atom to solve?? If so what packages have you installed/recommend installing besides the terminal package??