I want to solve a python $3$ program in version $3\mathrm{.}11$

Question: Document Merge

Programming challenge description:

Write a program that will parse, combine, and output CSV documents. This will require you to work through the data and merge the data sets appropriately based on a unique $"$ID$"$ identifier for each row.

For example:

ID$,$Name,Start,End

$16,$Abraham Lincoln,$1861,1865$

Merged with:

ID$,$Name,Start,End

$15,$James Buchanan,$1857,1861$

Would result in:

ID$,$Name,Start,End

$15,$James Buchanan,$1857,1861$

$16,$Abraham Lincoln,$1861,1865$

Input:

Two CSV$-$like documents split by an empty line. The first line of each "document" will be the header, with data following afterwards. Each value should always be treated as a string and will be separated by a comma as a control character. Each individual document should only contain unique IDs. The ID value should always be a string with a valid numeric value. The headers of both documents will be consistent. Each document will have at least one row in addition to the header. For example:

ID$,$Name,Start,End

$16,$Abraham Lincoln,$1861,1865$

ID$,$Name,Start,End

$15,$James Buchanan,$1857,1861$

Output:

A single CSV$-$like document as a result of the provided original documents. The first line should be the header with merged data on subsequent rows, sorted by the ID column. The output should only present one row per unique ID value. If a duplicate ID is provided, use the value in the second document in the results. For example:

ID$,$Name,Start,End

$15,$James Buchanan,$1857,1861$

$16,$Abraham Lincoln,$1861,1865$

Test $1$

Test Input

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ID$,$Name,Start,End

$16,$Abraham Lincoln,$1861,1865$

ID$,$Name,Start,End

$15,$James Buchanan,$1857,1861$

Expected Output

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ID$,$Name,Start,End

$15,$James Buchanan,$1857,1861$

$16,$Abraham Lincoln,$1861,1865$

Test $2$

Test Input

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ID$,$First,Status,Title

$541,$Tim,Part Time,Accountant

$327,$Allison,Full Time,Information Security

ID$,$First,Status,Title

$541,$Tim,Full Time,Senior Accountant

$100,$Sally,Full Time,Line Manager

Expected Output

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ID$,$First,Status,Title

$100,$Sally,Full Time,Line Manager

$327,$Allison,Full Time,Information Security

$541,$Tim,Full Time,Senior Accountant