bishop | A bayesian classifier library for Ruby

I need to do a match and join on two data frames if the string from two columns of one data frame are contained in the string of a column from a second data frame.

Example dataframe:

I'm making a chess game. I've created a main file with the Tkinter code in a class "Window". In this class, I created a canvas. Then I've created a second file with the name "pieces", where I put the behaviour of the different pieces. In this one, I have a superclass "Pieces", and a subclass "Bishop" (because I haven't created the classes for the other pieces yet)

What I tried first to do, is to create a bishop's icon in the constructor of the class "Bishop". My class "Bishop" has the argument "color", so that, when we create an object "Bishop", we can choose if he's black or white. So I wrote :

Given a infinite grid , we need to find out the minimum cost required to reach a destination from given source. Cost is calculated as below. Only diagonal movements are allowed. The cost is incremented only when direction is changed .Similar to Bishop move in chess. you can move as many cells in the same diagonal as you want that will not have any additional cost. if source is (1,1) and destination is (3,3) the cost is 1.

Can someone help me with efficient algorithm to achieve this.

I want to create a web app chess game, so every piece will have an event listener to wait until a player clicks on it. When a player clicks on a piece (for now I'm only working with pawns) it's id will be saved and printed out, and only after this all squares should wait for a click (I'm not working with valid squares, can be any square); and if a square is clicked, it's id should be saved and printed out.

But on console, when I click a pawn, it's id is printed twice, one time for the normal print, but another time for the square print (So it took square's print). So instead of the programm to wait to call the function that prints the square id after clicking the piece, the programm prints the piece id in the place of the square id. So I think the programm is not waiting until the first function is finished:

So I have the following in cityzone.txt:

I wanted to create a dictionary of values called pieces,
the key of the given dictionary had to be the name of the piece and the item it's Unicode charachter representation.

I decided to write a list comprehension to retrieve the Unicode charachters and a list with all the names that I needed.

I have a class that creates instances of another class. Occasionally it needs to react to or otherwise work with its products. However, it could create trouble if it were to be passed a product that it doesn't own. I have the following solution:

I've finished my chess game, but now I'm implementing a numpy array as the board so the chess AI I'm working on calculates faster. I know what a KeyError is, but I don't understand why its happening here. Error:

I am trying to program a chess computer. I am having a weird problem with a dictionary here. As you can see in the code below, I am only editing the pieces attribute of the Player object saved at 'w' in my dictionary self.players. However, when I run the code, for both Player objects created (Player('w') and Player('b')), the d[(1,1)].piece object appears in their respective Player.pieces['R']. How can this be? (In the code, only the class Board should be really important however I included the other classes so the code works).