利用 and、or 條件短路,寫得更簡潔些。
>>> x = 1
>>> print (x > 0 and "+") or (x < 0 and "-") or "0"
+
>>> x = 0
>>> print (x > 0 and "+") or (x < 0 and "-") or "0"
0
>>> x = 1
>>> print (x > 0 and "+") or (x < 0 and "-") or "0"
+
>>> x = 0
>>> print (x > 0 and "+") or (x < 0 and "-") or "0"
0