class Flight: self.fdate $=$ fdate self.origin $=$ origin self.fare $=$ fare

def read$\_$records$($fname$)$:#TODOdef find$\_$highest$($obj$\_$list$)$:destinations $=[$x$.$destination for x in obj$\_$list$]$max$\_$destinations $=[$destinations$[$i$]$ for i in range$($len$($destinations$))$ if fares$[$i$]==$ max$\_$fare$]$def display$($data$)$: returncities.sort$()$data $=$ read$\_$records$("$airfares$.$txt$")$

display$($data$)$The attached file "airfares.txt$"$ contains the records of airfares posted by an airline for flights

between Canadian cities. Each record is placed on a separate line, and consists of comma

separated fields containing $($from left to right$)$ the date$/$time of the flight, the origin city, the

destination city, and the airfare. Given the file "airfares.txt$",$ complete the implementation of

read$\_$records, and display for the program airfare$\_$pro.py to fulfill the following functional

behavior:

The function read$\_$records shall read airfare data records from the file airfares.txt and store

them in a dictionary with origin cities as keys and Flight objects as values.

The function display shall display for each origin city the highest fare of departing flights and

corresponding destinations. Origin cities must be listed in alphabetic order as illustrated by the

expected output of the program for the provided file, given below:Charlottetown : $$486\mathrm{.}85[\text{'}$Regina$\text{'}]$

Edmonton : $$500\mathrm{.}24[\text{'}$Quebec City'$]$

Fredericton : $$499\mathrm{.}21[\text{'}$Vancouver$\text{'}]$

Halifax : $$485\mathrm{.}32[\text{'}$Ottawa$\text{'},$ 'Whitehorse'$]$

Iqaluit : $$498\mathrm{.}57[\text{'}$Edmonton$\text{'}]$

London : $$457\mathrm{.}29[\text{'}$Edmonton$\text{'}]$

Montreal : $$499\mathrm{.}63[\text{'}$Yellowknife$\text{'}]$

Ottawa : $$493\mathrm{.}13[\text{'}$Victoria$\text{'}]$

Quebec City : $$499\mathrm{.}21[\text{'}0$ttawa', 'Winnipeg'$]$

Regina : $$469\mathrm{.}3[\text{'}$Windsor$\text{'}]$

St John's : $$495\mathrm{.}38[\text{'}$Quebec City'$]$

Toronto : $$497\mathrm{.}1[\text{'}$Edmonton$\text{'}]$

Vancouver : $$494\mathrm{.}87[\text{'}$Montreal$\text{'}]$

Victoria : $$494\mathrm{.}88[\text{'}$Vancouver$\text{'}]$

Whitehorse : $$496\mathrm{.}88[\text{'}$Calgary$\text{'}]$

Windsor : $$486\mathrm{.}19[\text{'}$Halifax$\text{'}]$

Winnipeg : $$498\mathrm{.}28[\text{'}$Yellowknife$\text{'}]$