Added Zigzag pattern problem using python

Python/zigzag.py

@@ -0,0 +1,33 @@
+print("Enter the number of rows and columns(m n): ", end="")
+m, n = map(int, input().split())
+# taking input for number of rows and columns
+
+pattern = [[0]*n for i in range(m)]
+# empty list of size m by n
+
+step = 1 # for incrementing or decrementing row counter
+row=0
+
+for col in range(n):
+    pattern[row][col] = col+1
+    if (row == m-1):
+        step=-1
+        # if row reaches the bottom, change step to -1
+    elif (row == 0):
+        step=1
+        # if row reaches the top, change step to -1
+    row+=step # add step to row counter
+
+max_width = len(str(n))
+# maximum characters which can be occupied by a number
+# this will be used for correct formatting of pattern
+
+for row in pattern:
+    for i in row:
+        if (i==0):
+            print(" "*max_width, end="")
+            # if the position is empty, print spaces
+        else:
+            print(str(i)+" "*(max_width - len(str(i))), end="")
+            # printing the number with appropriate spaces at its end
+    print()