我是 python 編程的新手，在任何地方都找不到這個(gè)幫助我有一個(gè)要在指定列表 exp 中搜索的用戶輸入值：option=input("option: ")iplist=['192.168.1.1', '192.168.1.2', '192.168.1.254']while option <= "3": #this is wrong. Help! nub = iplist[option] subprocess.call(["ping", nub])我希望用戶的選項(xiàng)是該程序列表中的數(shù)字，輸出應(yīng)該是：Option : 0Pinging 192.168.1.1 with 32 bytes of data:Reply from 192.168.1.1: bytes=32 time=2ms TTL=64Reply from 192.168.1.1: bytes=32 time=2ms TTL=64Reply from 192.168.1.1: bytes=32 time=2ms TTL=64Reply from 192.168.1.1: bytes=32 time=2ms TTL=64Ping statistics for 192.168.1.1: Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),Approximate round trip times in milli-seconds: Minimum = 2ms, Maximum = 2ms, Average = 2ms
1 回答
隔江千里
TA貢獻(xiàn)1906條經(jīng)驗(yàn) 獲得超10個(gè)贊
為什么需要循環(huán)？使用in檢查，如果在列表中存在的輸入值，并相應(yīng)如下：
option=input("option: ")
iplist=['192.168.1.1', '192.168.1.2', '192.168.1.254']
if option in iplist:
# do the rest
pass
或：
如果要獲取Index列表中元素的 ：
for index, elem in enumerate(iplist):
if option == elem:
print("Element found at Index: {}".format(index))
輸出：
option: 192.168.1.2
Element found at Index: 1
編輯 2：
首先要注意以下幾點(diǎn)：
從用戶那里獲取輸入并將其轉(zhuǎn)換為 anint因?yàn)槟鸁o法使用 str 索引訪問列表：
我仍然沒有看到循環(huán)點(diǎn)
所以：
import subprocess
option= int(input("option: ")) # 1
iplist=['192.168.1.1', '192.168.1.2', '192.168.1.254']
nub = iplist[option]
subprocess.call(["ping", nub])
輸出：
Pinging 192.168.1.2 with 32 bytes of data:
Request timed out.
Request timed out.
Request timed out.
Request timed out.
Ping statistics for 192.168.1.2:
Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),
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