Draft: Resolve "Bug in methods for getting results"

Closes #38

Required snippets

Accessing the last element of a list:

myList = ['aa', 'bb', 'cc']
print(myList[-1])

Regular expression for matching a resultID of the form "3D:RunID:X", where X is an integer with one or more digits:

parseResult = re.search(r"3D:RunID:(\d+)", resultID)

# If a match is found, retrieve the runID
if parseResult:
    runID = int(parseResult.group(1))
# Otherwise, raise an exception
else:
    raise RuntimeError("resultID did not match the expected pattern.")

To do

• Correct getSParameters method
• Correct getPower method
• Correct getResultTreeItem method