added part 3

task3.py

+#open the file in read mode
+fo = open("matrix.txt", "r")
+
+#initialsing a list for reading file
+mat = []
+for line in open('matrix.txt').readlines():
+    mat.append(map(int,line.split()))
+
+#no of rows and columns
+row=mat[0][0]
+col=mat[0][1]
+#initialising a 2D array for storing matrix
+matrix=[]
+#initialising with correct size 
+matrix=[[0 for i in range(row)] for j in range(col)]
+matrix=[[mat[j+1][i] for i in range(col)] for j in range(row)]
+
+#transpose matrix
+matrix2=[[mat[i+1][j] for i in range(row)] for j in range(col)]
+
+#writing in file
+foo=open('transpose.txt','w')
+foo.write(str(col))
+foo.write(' ')
+foo.write(str(row))
+foo.write('\n')
+for i in range(row):
+	for j in range(col):
+		foo.write(str(matrix2[i][j]))
+		foo.write(' ')
+	foo.write('\n')
+