Python「或」語句不起作用？

Question

我對python編程比較新，反正這是一小段代碼。這似乎是導致問題：

command = input("Command: ") 

while command != ("Exit lift" or "Up" or "Down" or "1" or "2" or "3" or "Cycle"): 
    print("Error: Command entered doesn't match the 'Commands' list, or isn't a possible command at this time! Please try again...") 
    command = input("Command: ") 

print ("Works") 

基本上，我測試的命令，並只選擇向上的「退出升降機」命令，「向上」，「向下」，「1」 ...等等將無法工作。

有什麼建議嗎？初學者

Answer 1

，而不是

while command != ("Exit lift" or "Up" or "Down" or "1" or "2" or "3" or "Cycle"): 

你應該使用

while not command in ("Exit lift", "Up", "Down", "1", "2", "3", "Cycle"): 

Answer 2

("Exit lift" or "Up" or "Down" or "1" or "2" or "3" or "Cycle")進行評估，以'Exit lift'。

>>> ("Exit lift" or "Up" or "Down" or "1" or "2" or "3" or "Cycle") 
'Exit lift' 

所以command != ("Exit lift" or "Up" or "Down" or "1" or "2" or "3" or "Cycle"):相當於command != ("Exit lift")。

使用not in與序列：

while command not in ("Exit lift", "Up", "Down", "1", "2", "3", "Cycle"): 
    .... 

Answer 3

你可以使用一個數組，並使用in字

allowed = ["Exit lift", "Up", "Down", "1", "2", "3", "Cycle"] 

while command not in allowed: 
    print "not allowed!" 

print "works"