Python-在第一個IF條件下停止

我很難理解為什么我的腳本只匹配字典中的第一個鍵，而不繼續處理其他鍵。

如果說僅存在 tcp 埠，我的腳本會生成我需要的命令，但是如果我嘗試混合使用它并具有其他埠（鍵），它將不會處理其他 elif。無論我是否將其放入 for 回圈中，我似乎都得到了相同的結果。我是新手，所以我可能在這里錯過了一些基本的東西。

ports = {'tcp': [['10', '20']], 'rant': [['100', '200']], 'cm': ['https']}

if __name__ == "__main__":
    obj = []
    tcpport = []
    udpport = []
    mxport = []
    if ports.get("tcp"):
        tcp2 = ports.get("tcp")
        tcpport = True
        for t in compile_port2(tcp2):
            obj.append(t)
            print("compiled tcp only objects")
    elif ports.get("udp"): 
        udpport = True
        udp2 = ports.get("udp")
        for u in compile_port2(udp2):
            obj.append(u)
            print("compiled udp only objects")
    elif ports.get("rant"):
        rant2 = ports.get("rant")
        tcpport = True
        ran_tcp2 = (list(it.zip_longest(*[iter(rant2[0])] * 2)))
        for rt in compile_rant_port2(ran_tcp2):
            obj.append(rt)
            print("compiled tcp only range objects")
    elif ports.get("ranu"):
        ranu2 = ports.get("ranu")
        udpport = True
        ran_udp2 = (list(it.zip_longest(*[iter(ranu2[0])] * 2))) # split strings by groups of 2 for port ranges  
        for ru in compile_rant_port2(ran_udp2):
            obj.append(ru)
            print("compiled udp only range objects")
    elif ports.get("cm"):
        tcpport = True
        cm2 = ports.get("cm")
        for c in compile_port2(cm2):
            obj.append(c)
            print("compiled worded objects\n\n")
    else:
        print("no items found")

uj5u.com熱心網友回復：

的用途elif是評估else-if條件。因此，如果if條件匹配，它將不匹配任何其他elifs'。

如果你想處理所有的鍵，你應該多個if條件而不是elif.

見下，修改版

ports = {'tcp': [['10', '20']], 'rant': [['100', '200']], 'cm': ['https']}

if __name__ == "__main__":
    obj = []
    tcpport = []
    udpport = []
    mxport = []
    items_found = False
    if "tcp" in ports:
        items_found=True
        tcp2 = ports.get("tcp")
        tcpport = True
        for t in compile_port2(tcp2):
            obj.append(t)
            print("compiled tcp only objects")
    if "udp" in ports:
        items_found = True
        udpport = True
        udp2 = ports.get("udp")
        for u in compile_port2(udp2):
            obj.append(u)
            print("compiled udp only objects")
    if "rant" in ports:
        items_found = True
        rant2 = ports.get("rant")
        tcpport = True
        ran_tcp2 = (list(it.zip_longest(*[iter(rant2[0])] * 2)))
        for rt in compile_rant_port2(ran_tcp2):
            obj.append(rt)
            print("compiled tcp only range objects")
    if "ranu" in ports:
        items_found = True
        ranu2 = ports.get("ranu")
        udpport = True
        ran_udp2 = (list(it.zip_longest(*[iter(ranu2[0])] * 2)))  # split strings by groups of 2 for port ranges  
        for ru in compile_rant_port2(ran_udp2):
            obj.append(ru)
            print("compiled udp only range objects")
    if "cm" in ports:
        items_found = True
        tcpport = True
        cm2 = ports.get("cm")
        for c in compile_port2(cm2):
            obj.append(c)
            print("compiled worded objects\n\n")
            
    if not items_found:
        print("no items found")

uj5u.com熱心網友回復：

我是否正確理解您在問為什么第一個條款

if ports.get("tcp"):
    tcp2 = ports.get("tcp")
    tcpport = True
    for t in compile_port2(tcp2):
        obj.append(t)
        print("compiled tcp only objects")

當埠中存在“tcp”時，它是唯一運行的嗎？這就是 if elif else 塊應該如何作業。Elif 代表 else if，即，“如果在我們之前發生的事情不是真的，那么接下來試試這個”

如果你想要多個東西，那么使用多個 if 塊而不是 elif。

標籤：Python if 语句

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