def create_matrix(lst): """Create matrix will take matrix represented as a list of list. And output a function which will index the input matrix Not allowed to Import Libraries Args: lst (List of List): A list of list representation of matrix. There will be more than one element of list type in lst. Returns: [function]: An indexing function. >>> matrix_index1 = create_matrix([[1, 2], [2, 3]]) # a 2 x 2 matrix. >>> matrix_index2 = create_matrix([[1, 2, 3], [2, 3, 1]]) # a 2 x 3 matrix. >>> matrix_index3 = create_matrix([[1, 2, 3], []]) # an invalid matrix """ ### Modify your code here def matrix_index(i=None, j=None): """Indexing function which will retrive (i, j) entry of the input matrix representation Args: i (int, optional): row index. Defaults to None. (0-index) j (int, optional): column index. Defaults to None. (0-index) Return: List of List: a list of list representation of the indexed. Return None if matrix or index is invalid >>> matrix_index1() [[1, 2], [2, 3]] >>> matrix_index1(i=1) # row 1 (2nd row since 0 indexed) [[2, 3]] >>> matrix_index1(j=1) # col 1 (2nd row since 0 indexed) [[2], [3]] >>> matrix_index1(i=1, j=1) [[3]] >>> print(matrix_index1(i=1, j=10)) None # invalid index >>> print(matrix_index3()) None # invalid matrix """ ### Modify your code here 270def create_matrix(1st):271"*"Create matrix will take matrix represented as a list of list.272And output a function which will index the input matrix273Not allowed to Import Libraries274Args:2751st (List of List): A list of list representation of matrix.276There will be more than one element of list type in 1st.277278Returns:279[function]: An indexing function.280281>> matrix_index1 = create_matrix([[1, 2], [2, 3]]) # a 2 x 2 matrix.create_matrix([[1, 2, 3], [2, 3, 1]]) # a 2 x 3 matrix.create_matrix([[1, 2, 3], []]) # an invalid matrix282>>> matrix_index2283>>> matrix_index3284285286### Modify your code here287def matrix_index(i=None, j=None):"""Indexing function which will retrive (i, j) entry of the input288289290matrix representation291292Args:i (int, optional): row index. Defaults to None. (0-index)j (int, optional): column index. Defaults to None. (0-index)293294295296Return:297List of List: a list of list representation of the indexed.298Return None if matrix or index is invalid299>>> matrix_index1()[[1, 2], [2, 3]]>>> matrix_index1(i=1) # row 1 (2nd row since 0 indexed)[[2, 3]]>>> matrix_index1(j=1) # col 1 (2nd row since 0 indexed)[[2], [3]]>>> matrix_index1(i=1, j=1)[[3]]>> print(matrix_index1(i=1, j=10))300301302303304305306307308309None # invalid index310>> print(matrix_index3())311None # invalid matrixEE EE EE312313

PROGRAM: def create_matrix(lst): row=0 col=len(lst[0]) for i in range(len(lst)):…

def create_matrix(lst): """Create matrix will take matrix represented as a list of list. And output a function which will index the input matrix Not allowed to Import Libraries Args: lst (List of List): A list of list representation of matrix. There will be more than one element of list type in lst. Returns: [function]: An indexing function. >>> matrix_index1 = create_matrix([[1, 2], [2, 3]]) # a 2 x 2 matrix. >>> matrix_index2 = create_matrix([[1, 2, 3], [2, 3, 1]]) # a 2 x 3 matrix. >>> matrix_index3 = create_matrix([[1, 2, 3], []]) # an invalid matrix """ ### Modify your code here def matrix_index(i=None, j=None): """Indexing function which will retrive (i, j) entry of the input matrix representation Args: i (int, optional): row index. Defaults to None. (0-index) j (int, optional): column index. Defaults to None. (0-index) Return: List of List: a list of list representation of the indexed. Return None if matrix or index is invalid >>> matrix_index1() [[1, 2], [2, 3]] >>> matrix_index1(i=1) # row 1 (2nd row since 0 indexed) [[2, 3]] >>> matrix_index1(j=1) # col 1 (2nd row since 0 indexed) [[2], [3]] >>> matrix_index1(i=1, j=1) [[3]] >>> print(matrix_index1(i=1, j=10)) None # invalid index >>> print(matrix_index3()) None # invalid matrix """ ### Modify your code here