formatting？

說明前后%和后面的參數數量不對應，比如File "<pyshell#37>", line 1, in <module>print '%f miles is the same as &f km' % (miles, kilometers)TypeError: not all arguments converted during string formatting后面有miles和kilometer兩個參數，前面只有一個%f， 前后不一致； 如果改成print '%f miles is the same as %f km' % (miles, kilometers) 就可以了