# Program To Work with String Manipulation Questions in Python Assignment Solution

July 05, 2024
🇸🇬 Singapore
Python
Dr. Muhammad Rahman holds a Ph.D. in Computer Engineering and has successfully completed over 900 Python programming test assignments with ProgrammingHomeworkHelp.com. His expertise lies in Python for cybersecurity, network programming, data encryption, and software development.
Key Topics
• Instructions
• Requirements and Specifications
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## Instructions

Objective

Write a python assignment program to work with string manipulation questions.

## Requirements and Specifications

Source Code

```QUESTION 1 def up_down_strings(los): alpha = 'abcdefghijklomnpqrstuvwxyz' for j in range(len(los)-1, -1, -1): s = los[j] prev = alpha.index(s[0]) - alpha.index(s[1]) is_ok = True for i in range(1, len(s)-1): curr = alpha.index(s[i]) - alpha.index(s[i+1]) if prev * curr >= 0: is_ok = False break prev = curr if not is_ok: del los[j] if __name__ == '__main__': test = ['yygrees', 'itsy', 'garbs', 'beets', 'abc', 'sole'] up_down_strings(test) print(test) QUESTION 2 def othello(board, turn, row, col): if board[row][col] != '': return False rows = len(board) cols = len(board[0]) # down step = 0 while True: step += 1 if row + step >= rows: break if board[row+step][col] == '': break if board[row+step][col] == turn: if step >= 2: return True else: break # up step = 0 while True: step += 1 if row - step < 0: break if board[row - step][col] == '': break if board[row - step][col] == turn: if step >= 2: return True else: break # right step = 0 while True: step += 1 if col + step >= rows: break if board[row][col+step] == '': break if board[row][col+step] == turn: if step >= 2: return True else: break # left step = 0 while True: step += 1 if col - step < 0: break if board[row][col - step] == '': break if board[row][col - step] == turn: if step >= 2: return True else: break # right-down step = 0 while True: step += 1 if row + step >= rows: break if col + step >= cols: break if board[row+step][col+step] == '': break if board[row+step][col+step] == turn: if step >= 2: return True else: break # left-down step = 0 while True: step += 1 if row + step >= rows: break if col - step < 0: break if board[row + step][col-step] == '': break if board[row + step][col-step] == turn: if step >= 2: return True else: break # right-up step = 0 while True: step += 1 if row - step < 0: break if col + step >= cols: break if board[row-step][col+step] == '': break if board[row-step][col+step] == turn: if step >= 2: return True else: break # left-up step = 0 while True: step += 1 if row - step < 0: break if col - step < 0: break if board[row - step][col-step] == '': break if board[row - step][col-step] == turn: if step >= 2: return True else: break return False if __name__ == '__main__': board = [[ '', '', '', '', '', '', '', ''], [ '', '', '', '', '', '', '', ''], [ '', '', 'B', 'B', 'B', '', '', ''], [ '', 'W', 'B', 'W', 'W', '', 'B', ''], [ '', 'W', 'B', 'W', 'W', 'W', 'W', ''], [ '', '', 'W', 'W', 'W', '', '', ''], [ '', '', '', 'W', '', '', '', ''], [ '', '', '', '', '', '', '', '']] print(othello(board, 'B', 3, 0)) print(othello(board, 'W', 3, 0)) board2 = [['B', 'W', 'B', 'B', 'B', 'W', 'B', 'B'], ['W', 'B', 'B', 'W', 'W', 'B', 'B', 'B'], ['B', 'B', 'W', 'W', 'B', 'B', 'B', 'B'], ['B', 'W', 'W', 'W', 'W', 'W', 'W', 'W'], ['W', 'W', 'W', 'W', 'W', 'W', 'B', 'B'], ['B', 'B', 'W', 'W', 'W', 'B', 'B', 'W'], ['B', 'B', 'W', 'B', 'B', 'B', 'W', 'W'], ['B', 'B', 'W', 'B', 'B', 'B', 'W', 'W']] print(othello(board2, 'W', 1, 2)) QUESTION 3 def multiply_polynomials(poly1, poly2): m = max(len(poly1), len(poly2)) n = len(poly1) + len(poly2) - 1 result = [] for i in range(n): result.append(0) for i in range(len(poly1)): for j in range(len(poly2)): result[i+j] += poly1[i] * poly2[j] return result if __name__ == '__main__': P1 = [151493] P2 = [215578] print(multiply_polynomials(P1, P2)) P1 = [1, 2, 3] P2 = [4 ,5] print(multiply_polynomials(P1, P2)) ```

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