Fix warning about wrong usage of 'is'

[MaxGyver83]

1. Get rid of warning in script output:

./8vim_keyboard_layout_calculator/main.py:63: SyntaxWarning: "is" with a literal. Did you mean "=="?

2. Simplify (l for l in zip(*sortedScoreIdxTuples[-nrOfBest:]))

3. Fix some linter warnings.

[Glitchy-Tozier]

Hi and thank you for the PR! It seems to run fine, though I have a question to one specific change:
What is the purpose of adding the additional escape-backslashes in this section?

blueprint = """   \\  {27}         {28}  /
 {26}  \\  {19}       {20}  /  {29}
  {18}  \\  {11}     {12}  /  {21}
   {10}  \\  {3}   {4}  /  {13}
    {2}  \\ _____ /  {5}
        |     |
        |_____|
    {1}  /       \\  {6}
   {9}  /  {0}   {7}  \\  {14}
  {17}  /  {8}     {15}  \\  {22}
 {25}  /  {16}       {23}  \\  {30}
   /  {24}         {31}  \\ """

At first glance, the layout seems to show just fine without them.

[MaxGyver83]

Hi and thank you for the PR! It seems to run fine, though I have a question to one specific change: What is the purpose of adding the additional escape-backslashes in this section?

blueprint = """   \\  {27}         {28}  /
 {26}  \\  {19}       {20}  /  {29}
  {18}  \\  {11}     {12}  /  {21}
   {10}  \\  {3}   {4}  /  {13}
    {2}  \\ _____ /  {5}
        |     |
        |_____|
    {1}  /       \\  {6}
   {9}  /  {0}   {7}  \\  {14}
  {17}  /  {8}     {15}  \\  {22}
 {25}  /  {16}       {23}  \\  {30}
   /  {24}         {31}  \\ """

At first glance, the layout seems to show just fine without them.

My linter (pycodestyle) complains about single backslashes:

Backslashes are used as escape characters in strings. If you want to use a backslash in a string, it needs to be escaped by a backslash itself.

In [1]: print("\\")
\

A backslash followed by a space is not a recognized escape sequence. As far as I understand, this works but it will be an error in future Python versions:

Changed in version 3.6: Unrecognized escape sequences produce a DeprecationWarning. In a future Python version they will be a SyntaxWarning and eventually a SyntaxError.

raw strings are an exception:

In [2]: print(r"\\")
\\

Here a backslash is a literal backslash.

More details here: 2.4.1. String and Bytes literals

[Glitchy-Tozier]

Got it, thanks again, merging the PR!

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Off topic: Danke für deine Artikeln zu NEO, KOY etc.! Dank deiner Website habe ich vor ca. 2 Jahren beschlossen, zu KOY zu wechseln.

[MaxGyver83]

Thanks for merging! And thanks for this project!

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Was für ein Zufall, dass du meine Website kennst! Ich freu mich natürlich, wenn jemand etwas damit anfangen kann!