Program To Work with String Manipulation Questions in Python Assignment Solution
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- Instructions
- Requirements and Specifications
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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