誰かがこのプログラムを説明してもらえますか? 役割がどこから来ているのかわかりません
>>> data = open('sketch.txt')
>>> for each_line in data: // stores each line from the sketch file in each_line
... (role, line_spoken) = each_line.split(':')
... print(role, end='')
... print(' said: ', end='')
... print(line_spoken, end='')