Change sign of elements with an odd sum of indices

np.negative is silghtly faster than multiplying (as it is a ufunc) N = 5 arr = np.arange(N ** 3).reshape(N, N, N) %timeit arr.ravel()[1::2] *= -1 %timeit np.negative(arr.ravel()[1::2], out = arr.ravel()[1::2]) The slowest run took 8.74 times longer than the fastest. This could mean that an intermediate result is being cached. 100000 loops, best of 3: … Read more

Python returns "SyntaxError: invalid syntax sys module" [closed]

import pandas as pd sys.path.insert(0, “/usr/lib/python2.7/site-packages”) This line contains two statements. Split them into two lines: import pandas as pd sys.path.insert(0, “/usr/lib/python2.7/site-packages”) Or, if they must be in one line, separate them with semicolon (highly not recomended!!!): import pandas as pd; sys.path.insert(0, “/usr/lib/python2.7/site-packages”)

Results from my program [closed]

Take a look at the order of arguments in your rollDice function. #this function will get the random values def rollDice(winnerName, playerOne, playerTwo): …. …. It is expecting winnerName as the first argument. In your main function you have it set as the last argument. Change this: winnerName = rollDice(playerOne, playerTwo, winnerName) to this: winnerName … Read more