Write a function named city_pop that takes a string then a list as parameters where the string represents the name of a CSV file containing city data in the format "CountryCode,CityName,Region,Population,Latitude,Longitude". The second parameter is a list with a length of 3. . The entries represent the CountryCode, CityName, and Regionof the city whose population we are interested in (in that order).Return the population of the city provided in the second argument.Because city names are not unique, you must check that the country, name, AND region are a match adding the population to your accumulator.PYTHON

In python

Filename: runlength_decoder.py Starter code for data: hw4data.py Download hw4data.py  Download hw4data.pyYou must provide a function named decode() that takes a list of RLE-encoded values as its single parameter, and returns a list containing the decoded values with the “runs” expanded. If we were to use Python annotations, the function signature would look similar to this:def decode(data : list) -> list: Run-length encoding (RLE) is a simple, “lossless” compression scheme in which “runs” of data. The same value in consecutive data elements are stored as a single occurrence of the data value, and a count of occurrences for the run. For example, using Python lists, the initial list:     [‘P’,‘P’,‘P’,‘P’,‘P’,‘Y’,‘Y’,‘Y’,‘P’,‘G’,‘G’] would be encoded as:     ['P', 5, 'Y', 3, ‘P’, 1, ‘G’, 2] So, instead of using 11 “units” of space (if we consider the space for a character/int 1 unit), we only use 8 “units”.  In this small example, we don’t achieve much of a savings (and indeed the…

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