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A line has the form name:mark, such as Asha:72…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
A line has the form name:mark, such as Asha:72. Write a function read_line(line) that gives back a tuple (name, mark) with the name tidy (the first letter big, the rest small) and the mark as a whole number. For a bad line (no colon, an empty name, or a mark that is not all digits), it gives back None. Test it on "asha:72", " RAVI : 85 ", "kabir", ":50" and "zoya:ten".
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Plan. Cut at the first colon with partition, clean both parts, and check before you trust.
Check.
"asha:72"gives("Asha", 72)." RAVI : 85 "is cleaned bystripon both parts, and gives("Ravi", 85)."kabir"has no colon, sosepis empty:None.":50"has an empty name:None."zoya:ten"has a mark that is not all digits:None.
Answer: ("Asha", 72), ("Ravi", 85), None, None, None.
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