I fixed the other functions to again work as expected. But the procedural access of the self.grid and self.transposed_grid also function correctly. That is good because now I can again do lookups if I need to. Although I do not have a need to at this time.

Can anyone see anything wrong with the logic as it is at this time? If anyone has any improvements or things to think about, I would love to hear it. I am going to work on some tests that will specifically involve the procedural code to verify that the id's are arranged in the grid as I expect them to be.

I would also appreciate an explanation of why my by_id functions use the opposite grid to get the correct output?

#Output Below
python3 test1.py
| 19 | 11 |  5 | 19 |
| 11 | 19 | 19 |  5 |
| 20 | 19 | 20 |  6 |
| 11 | 19 | 11 |  5 |
| 11 |  6 |  5 | 20 |
|  6 |  5 | 19 | 19 |
| 20 | 19 | 20 | 20 |
|  6 | 20 | 19 | 20 |
After Eliminations
| 19 |  0 |  5 | 19 |
|  0 |  0 |  0 |  5 |
|  0 |  0 | 20 |  6 |
|  0 | 19 | 11 |  5 |
|  0 |  6 |  5 | 20 |
|  0 |  5 | 19 | 19 |
| 20 | 19 | 20 | 20 |
|  6 | 20 | 19 | 20 |

After Drops
|  0 |  0 |  0 | 19 |
|  0 |  0 |  5 |  5 |
|  0 |  0 | 20 |  6 |
|  0 | 19 | 11 |  5 |
|  0 |  6 |  5 | 20 |
| 19 |  5 | 19 | 19 |
| 20 | 19 | 20 | 20 |
|  6 | 20 | 19 | 20 |
By ID
| 0,0 | 1,0 | 2,0 | 3,0 |
| 0,1 | 1,1 | 2,1 | 3,1 |
| 0,2 | 1,2 | 2,2 | 3,2 |
| 0,3 | 1,3 | 2,3 | 3,3 |
| 0,4 | 1,4 | 2,4 | 3,4 |
| 0,5 | 1,5 | 2,5 | 3,5 |
| 0,6 | 1,6 | 2,6 | 3,6 |
| 0,7 | 1,7 | 2,7 | 3,7 |
Procedurally
| 0,0 (0,0) | 1,0 (1,0) | 2,0 (2,0) | 3,0 (3,0) |
| 0,1 (0,1) | 1,1 (1,1) | 2,1 (2,1) | 3,1 (3,1) |
| 0,2 (0,2) | 1,2 (1,2) | 2,2 (2,2) | 3,2 (3,2) |
| 0,3 (0,3) | 1,3 (1,3) | 2,3 (2,3) | 3,3 (3,3) |
| 0,4 (0,4) | 1,4 (1,4) | 2,4 (2,4) | 3,4 (3,4) |
| 0,5 (0,5) | 1,5 (1,5) | 2,5 (2,5) | 3,5 (3,5) |
| 0,6 (0,6) | 1,6 (1,6) | 2,6 (2,6) | 3,6 (3,6) |
| 0,7 (0,7) | 1,7 (1,7) | 2,7 (2,7) | 3,7 (3,7) |
Tansposed
| 0,0 | 0,1 | 0,2 | 0,3 | 0,4 | 0,5 | 0,6 | 0,7 |
| 1,0 | 1,1 | 1,2 | 1,3 | 1,4 | 1,5 | 1,6 | 1,7 |
| 2,0 | 2,1 | 2,2 | 2,3 | 2,4 | 2,5 | 2,6 | 2,7 |
| 3,0 | 3,1 | 3,2 | 3,3 | 3,4 | 3,5 | 3,6 | 3,7 |
Transposed & Procedurally
| 0,0 (0,0) | 0,1 (0,1) | 0,2 (0,2) | 0,3 (0,3) | 0,4 (0,4) | 0,5 (0,5) | 0,6 (0,6) | 0,7 (0,7) | | 1,0 (1,0) | 1,1 (1,1) | 1,2 (1,2) | 1,3 (1,3) | 1,4 (1,4) | 1,5 (1,5) | 1,6 (1,6) | 1,7 (1,7) | | 2,0 (2,0) | 2,1 (2,1) | 2,2 (2,2) | 2,3 (2,3) | 2,4 (2,4) | 2,5 (2,5) | 2,6 (2,6) | 2,7 (2,7) | | 3,0 (3,0) | 3,1 (3,1) | 3,2 (3,2) | 3,3 (3,3) | 3,4 (3,4) | 3,5 (3,5) | 3,6 (3,6) | 3,7 (3,7) |

# Code Below
import random


class GameTile():
    def __init__(self, col, row, values=None, value=None, **kwargs):
        # values is not required because the value can be directly set.
        # This is to support a future feature that will allow me to build a
        # board off of a list.
        # id is grid (X,Y) which is equal to grid (col,row)
        self.id = str(col) + ',' + str(row)
        self.col = col
        self.row = row
        if value is None:
            value = random.choice(values)
        self.value = value
        self.eliminated = False
        # hide_anim = hidden for animation purposes
        self.hide_anim = False
        # drop_value = value to be dropped during animation
        self.drop_value = None
        # drop_to could have inversely been a drop_from
        # drop_to = the id of where the value should be dropped too.
        self.drop_to = None

    def __str__(self):
        return "%2d" % self.value


class GameGrid():
    def __init__(self, cols=8, rows=7, **kwargs):
        if cols < 3 or rows < 3:
raise ValueError("Minimum board size is 3x3! %sx%s is too small."
                 % (cols, rows))
        self.cols = cols
        self.rows = rows
        self.values = [5, 6, 11, 19, 20]
        self.make_grid()

    def make_grid(self):
        # grid is 2d array as x, y ie [x][y].
        self.transposed_grid = []
        for row_num in range(self.rows):
# Do you still think this needs to be broken into a smaller method?
            row = [GameTile(col_num, row_num, self.values)
                   for col_num in range(self.cols)]
            self.transposed_grid.append(row)
        self.grid = list(zip(*self.transposed_grid))

    def draw(self):
        for row in self.transposed_grid:
            print(end='| ')
            for node in row:
                print(node, end=' | ')
            print()

    def draw_by_id(self):
        # Why does this one use self.transposed_grid instead of self.grid ?
        for row in self.transposed_grid:
            print(end='| ')
            for node in row:
                print(node.id, end=' | ')
            print()

    def draw_by_id_proc(self):
        # Draw Procedurally
        for row_num in range(self.rows):
            print(end='| ')
            for col_num in range(self.cols):
print(self.grid[col_num][row_num].id, '(' + str(col_num) + ',' + str(row_num) + ')', end=' | ')
            print()

    def draw_by_id_trans(self):
        # Why does this one use self.grid instead of self.transposed_grid ?
        for col in self.grid:
            print(end='| ')
            for node in col:
                print(node.id, end=' | ')
            print()

    def draw_by_id_proc_trans(self):
        # Draw Procedurally & Transposed
        for col_num in range(self.cols):
            print(end='| ')
            for row_num in range(self.rows):
print(self.transposed_grid[row_num][col_num].id, '(' + str(col_num) + ',' + str(row_num) + ')', end=' | ')
            print()

    def find_eliminations(self):
        #First Down the columns.
        i = 0
        for col_list in self.grid:
            while True:
                try:
                    if self.check_total(col_list[i: i + 3]):
                        self.eliminate(col_list[i: i + 3])
                    i += 1
                except ValueError:
                    i = 0
                    break
        # Now across the rows.
        for row_list in self.transposed_grid:
            while True:
                try:
                    if self.check_total(row_list[i: i + 3]):
                        self.eliminate(row_list[i: i + 3])
                    i += 1
                except ValueError:
                    i = 0
                    break
        # Set all eliminated nodes to a value of 0.
        for col in self.transposed_grid:
            for node in col:
                if node.eliminated is True:
                    node.eliminated = False
                    node.value = 0

    def check_total(self, slices):
        first, second, third = slices
        if first.value == second.value or second.value == third.value:
            total = first.value + second.value + third.value
            return total in (17, 21, 28, 29, 31, 42, 45, 46, 49, 58)

    def eliminate(self, slices):
        first, second, third = slices
        first.eliminated = True
        second.eliminated = True
        third.eliminated = True

    def drop_floating_nodes0(self):
        i = self.rows
# first_zero_row serves as memory for how far to drop non-zero values
        first_zero_row = None
        for col_list in self.grid:
            while True:
                # Low is on Top, High is on Bottom
                low, high = col_list[i - 2: i]  # Goes Up the Rows
                if high.value == 0:
                    if low.value != 0:
                        if first_zero_row is None:
                            high.value = low.value
                            low.value = 0
                            first_zero_row = low
                        else:
                            first_zero_row.value = low.value
                            low.value = 0
                            try:
                                row = first_zero_row.row - 1
                                col = first_zero_row.col
                                first_zero_row = self.grid[col][row]
                            except:
                                i = self.rows
                                print('broke', col, row)
print(first_zero_row.col, first_zero_row.row)
                                first_zero_row = None
                                break
                    else:
                        if first_zero_row is None:
                            first_zero_row = high
                i -= 1
                if i == 1:
                    i = self.rows
                    first_zero_row = None
                    break

    def drop_floating_nodes1(self):
        i = 0
        for col_list in self.transposed_grid:
            while True:
                try:
                    low, high = col_list[i: i + 2]  # Goes Down the Rows
                    if high.value == 0 and low.value != 0:
                        high.value = low.value
                        low.value = 0
                    i += 1
                except ValueError:
                    i = 0
                    break




grid = GameGrid(4, 8)
grid.draw()
grid.find_eliminations()
print('After Eliminations')
grid.draw()
print()
grid.drop_floating_nodes0()
print('After Drops')
grid.draw()
print('By ID')
grid.draw_by_id()
print('Procedurally')
grid.draw_by_id_proc()
print('Tansposed')
grid.draw_by_id_trans()
print('Transposed & Procedurally')
grid.draw_by_id_proc_trans()
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