Please read the instructions below carefully and follow them closely. All problems $($and

sub$-$parts of the problems$)$ are required except as noted in the instructions below. If you

have any questions, please email the instructor or one of the section leaders.

Important: You will lose $5$ points if you use the tab character for indentation.

Important: Your filenames must be identical to the filenames given below. For

any functions you are asked to write, the function signature $($header$)$ must be exactly as

described in the instructions. That is$,$ you must use the exact function names given in

the instructions, you must have the parameters the instructions ask for, and the

parameters must be in the order the instructions give.

Important: Make sure you always save a backup of your work somewhere safe

$($such as your UA Box, Dropbox, Google Drive, etc$).$

Important: You are not just graded on whether your code produces the same

result as the examples show. You should be using what you$$ve learned to do your best

to write good code. For example, things like poorly named variables$/$functions$,$

duplicating code where you could instead use a loop, and missing documentation will

cost you points.

$1\mathrm{.}0)$ FISH CATCH $(40$ POINTS$)$

$1\mathrm{.}1)$ DETAILS

Download the plain text files "fishcatch.txt$"$ and "fishcatch.dat" from

D$2$L and open them both with Sublime, Notepad$++,$ or any plain text editor.

"fishcatch.txt$"$ gives an explanation of the data in "fishcatch.dat". Read

the explanation to understand what is in "fishcatch.dat". For this assignment

we$$ll only be interested in the name and weight of each fish in the $".$dat" file.

Create a new file called "fishcatch.py$".$ In the file:

$1.)$ Write a function called fish$\_$dict$\_$from$\_$file that takes a single string

parameter giving the name of a file to read.

i$.)$ In the function make a dictionary containing the mapping from the

Numeric Species Code to the English fish name.

$$ For example, in your literal dictionary the key $1$ will map to the value

"Bream". If your literal dictionary is called fishmap then the

following expression would be True: fishmap$[1]==$ "Bream".

$$ You$$ll use this dictionary in the next step to get the name of each fish.

ii$.)$ Next create an empty dictionary and read each fish Species and Weight from

the "fishcatch.dat" file into the dictionary, mapping the English name of

each fish species onto a list containing the weights of all of the fish of that type

that were caught.

$$ i$.$e$.$ for each different fish name the dictionary will contain a single list of

floats.

$$ e$.$g$.$ the dictionary will have one key$-$value pair for "Bream". The

key will be "Bream" and the value will be a list of floats containing

the weights of all of the Bream that were caught.

$$ Skip any fish that has a missing weight value $($i$.$e$.$ weight is $$NA$).$

iii.$)$ Return the dictionary that contains the fish names and weights.

$2.)$ In main:

i$.)$ Call your function to get a dictionary of fish names and weights.

ii$.)$ Print a report showing for each fish the number of fish of that type, the name

of the fish, and the mean weight of that fish type in grams.

$$ The report should show the fish in alphabetical order.

$$ Make it pretty as shown in the following example:

# NAME MEAN WT

$11?154\mathrm{.}8$g

$34$ Bream $626\mathrm{.}0$g

$56$ Perch $382\mathrm{.}2$g

$17$ Pike $718\mathrm{.}7$g

$20$ Roach $152\mathrm{.}1$g

$14$ Smelt $11\mathrm{.}2$g

$6$ Whitefish $531\mathrm{.}0$g

NOTE: You will need to right justify the # by $4,$ left justify the NAME by

$10$ and finally right justify the MEAN WT by $10,$ if you pass $3$

arguments to print. If you use string concatenation, you will have

to add to spaces in the appropriate positions.

$3.)$ Verify that your documentation makes sense and that you$$ve added documentation

to each of your functions.

$4.)$ Verify that your program works.

$5.)$ Upload your file to the Hw$6$ Assignments folder on D$2$L

$2\mathrm{.}0)$ EMOTICONS $(60$ POINTS$)$

$2\mathrm{.}1)$ DETAILS

Download the plain text file "twitter$\_$emoticons.dat".

The file contains actual Twitter data about tweets that contained emoticons. Each row in

the file represents a single tweet. Each row contains the emoticon text characters, a

tweet ID$,$ a user ID$,$ and a timestamp.

Here are the first few lines of the file:

$"$D:$"5646373703"0049961833"20091112110207$

$"$;$-)"5646377600"0003829631"20091112110222$

$"$;$-)"5646425002"0035714667"20091112110544$

$"$:$("5646427235"0031244602"20091112110554$

$...$

The first

$1.)$ Write a function called load$\_$twitter$\_$dicts$\_$from$\_$file that takes three

parameters: filename $($the name of a twitter data file to read$),$ emoticons$\_$to$\_$ids

$($an empty dictionary$),$ and ids$\_$to$\_$emoticons $($an empty dictionary$).$

i$.)$ The function should read the given file and load the two dictionaries with