part 6.1 some exercises uploaded

Author: antoniolopez7217

part6/1. Reading files/matrix.py

@@ -0,0 +1,51 @@
+# The file matrix.txt contains a matrix in the format specified in the example below:
+
+# 1,0,2,8,2,1,3,2,5,2,2,2
+# 9,2,4,5,2,4,2,4,1,10,4,2
+# ...etc...
+# Please write two functions, named matrix_sum and matrix_max. 
+# Both go through the matrix in the file, and then return the sum of the elements or the element with the greatest value, as the names of the functions imply.
+
+# Please also write the function row_sums, which returns a list containing the sum of each row in the matrix. 
+# For example, calling row_sums when the matrix in the file is defined as
+
+# 1,2,3
+# 2,3,4
+
+# the function should return the list [6, 9].
+
+# Hint: you can also include other helper functions in your program. 
+# It is very worthwhile to spend a moment considering which functionalities are shared by the three functions you are asked to write. 
+# Notice that the three functions named above do not take any arguments, but any helper functions you write may take arguments. 
+# The file you are working with is always named matrix.txt.
+
+def open_matrix():
+	with open("matrix.txt") as new_file:
+		matrix = []
+		for line in new_file:
+			int_row = []
+			line = line.replace("\n","")
+			line = line.split(",")
+			for value in line:
+				int_row.append(int(value))
+			matrix.append(int_row)
+	return matrix
+
+def row_sums():
+	matrix = open_matrix()
+	sum_rows = []
+	for row in matrix:
+		sum_rows.append(sum(row))
+	return sum_rows
+
+def matrix_sum():
+	row_sum = row_sums()
+	return sum(row_sum)	
+
+def matrix_max():
+	matrix = open_matrix()
+	max_value = matrix[0][0]
+	for row in matrix:
+		if max(row) > max_value:
+			max_value = max(row)
+	return max_value