classes

Example Python program classes.py For Python version 2.x. To test your Python version use:

python --version

class space:
class area:
class square(area):

Methods

def init(self, spacename, column, row, value):
def make_impossible(self, value):
def init(self, name):
def make_impossible(self, value):
def set_columns_and_rows(self):

Code

Python example

class space:
    def __init__(self, spacename, column, row, value):
        self.name = spacename
        self.value = value
        self.row = str(row)
        self.column = column
        self.impossible = []
        if self.value == 0:
            self.possible = [1,2,3,4,5,6,7,8,9]
        else:
            self.possible = self.value

    def make_impossible(self, value):
        if type(self.possible) == list:
            if value in self.possible:
                self.possible.remove(value)
        if value not in self.impossible:
            self.impossible.append(value)
class area:
    def __init__(self, name):
        self.name = name
        self.need = [1,2,3,4,5,6,7,8,9]
        self.impossible = []

    def make_impossible(self, value):
        if value in self.need:
            self.need.remove(value)
        if value not in self.impossible:
            self.impossible.append(value)

class square(area):
    def set_columns_and_rows(self):        

        left_columns = ["A", "B", "C"]
        center_columns = ["D", "E", "F"]
        right_columns = ["G", "H", "I"]

        top_rows = ["1","2","3"]
        middle_rows = ["4","5","6"]
        bottom_rows = ["7","8","9"]

        if self.name[-1] == "1":
            self.columns = left_columns
            self.rows = top_rows

        elif self.name[-1] == "2":
            self.columns = center_columns
            self.rows = top_rows

        elif self.name[-1] == "3":
            self.columns = right_columns
            self.rows = top_rows

        elif self.name[-1] == "4":
            self.columns = left_columns
            self.rows = middle_rows

        elif self.name[-1] == "5":
            self.columns = center_columns
            self.rows = middle_rows

        elif self.name[-1] == "6":
            self.columns = right_columns
            self.rows = middle_rows

        elif self.name[-1] == "7":
            self.columns = left_columns
            self.rows = bottom_rows

        elif self.name[-1] == "8":
            self.columns = center_columns
            self.rows = bottom_rows

        elif self.name[-1] == "9":
            self.columns = right_columns
            self.rows = bottom_rows
        else:
            print "how"

Useful Links

Articles: https://python-commandments.org/
Python shell: https://bsdnerds.org/learn-python/
Tutorial: https://pythonprogramminglanguage.com/