Solution: Task V to Task VIII

from matrix import Matrix
import contextlib
from functools import wraps
# Generator function decorated
@contextlib.contextmanager
def readFile(filename, mode):
    myfile = open(filename, mode) # Executed before the block
    yield myfile
    
    myfile.close()                # Executed after the block
# Reading matrix from file
def read_matrix(filename):
    matrix = []
    with readFile(filename, 'r') as fp:
        for line in fp:
            matrix.append([int(num) for num in line.split()]) 
    return matrix
# Reading matrices
matrix1 = Matrix(read_matrix('matrix1.txt'))
matrix2 = Matrix(read_matrix('matrix2.txt'))
# Priming a coroutine
def coroutine(func):
  @wraps(func)
  def primer(*args, **kwargs):
    generator = func(*args, **kwargs)
    next(generator)
    return generator
  return primer
# Adding matrices in series
@coroutine
def add_series():
    result = Matrix(None)
    while True:
        curr_matrix = yield result
        if result.matrix is None:   # First retrieval
            result.matrix = curr_matrix.matrix  
            result.print()
        else:
            try:
                result = curr_matrix + result   # Adding previous result
            except:
                print('Cannot add.')
            else:
                result.print()
cr = add_series()
cr.send(matrix1)
cr.send(matrix2)
m = Matrix([[0,0]])
cr.send(m)
cr.send(matrix1)
cr.close()