Question

我有一个键索引，颜色代码和颜色名称的元组列表，如下所示：

BG_MENU_THEME = [
                    ('1','#031B4D','Blue Ocean'),
                    ('2','#303E4D','Grayish blue'),
                    ('3','#062847','Ghibli Ocean  Drak 1'),
                    ('4','#00122e','Ghibli Ocean  Drak 2'),
                    ('4','#00122e','Ghibli Ocean  Drak 2'),
                    ('5','#115478','Ghibli Ocean - Ligit'),
                    ('6','#243447','Twitterish Color'),
                    ('7','#152324','Dark Forrest'),
                    ('8','#11202F','Dark Blue Original'),
                    ('99','','_None')
                ]

给出colorIndext='8'，如何获得颜色代码'#11202F'？不要说BG_MENU_THEME[8][1]，因为如果out of index会引发错误colorIndex='99'。

我尝试过：

BackgroundColor     = BG_MENU_THEME[row[0]] for row in BG_MENU_THEME if row[0]==ColorIndex

得到SyntaxError: invalid syntax

请帮忙给我建议吗？谢谢

Answer 1

使用带有next的生成器：

BackgroundColor = next(color[1] for color in BG_MENU_THEME if color[0] == colorIndex)

Answer 2

使用字典也可以：

BG_MENU_THEME = [
                    ('1','#031B4D','Blue Ocean'),
                    ('2','#303E4D','Grayish blue'),
                    ('3','#062847','Ghibli Ocean  Drak 1'),
                    ('4','#00122e','Ghibli Ocean  Drak 2'),
                    ('4','#00122e','Ghibli Ocean  Drak 2'),
                    ('5','#115478','Ghibli Ocean - Ligit'),
                    ('6','#243447','Twitterish Color'),
                    ('7','#152324','Dark Forrest'),
                    ('8','#11202F','Dark Blue Original'),
                    ('99','','_None')
                ]

d = {key: code for key, code, color in BG_MENU_THEME}

BackgroundColor = d['8']

print(BackgroundColor)
# #11202F

您还可以事先将BG_MENU_THEME保留为字典，这样就不需要转换阶段了。

Answer 3

Proxy p = new Proxy();
p.setHttpProxy("in-pr.oxylabs.io:20000");
p.setSslProxy("in-pr.oxylabs.io:20000");
System.setProperty("webdriver.chrome.driver","D:\\Love_Testing\\Senium_Naveen\\chrome Driver\\chromedriver_win32\\chromedriver.exe");
ChromeOptions options = new ChromeOptions();
//  options.addArguments("--incognito");
DesiredCapabilities dc = DesiredCapabilities.chrome();
dc.setCapability(ChromeOptions.CAPABILITY,options);
dc.setCapability("proxy",p);
WebDriver driver = new ChromeDriver(dc);
driver.get("https://www.google.com");

或简称：for tup in BG_MENU_THEME: if tup[0] == "8": print (tup[1]) # background color.，如果您真的想使用列表理解。当您实际上没有使用列表推导时，您正在使用语法来实现列表推导。这就是为什么它会引发错误。

遍历每个元组，并检查元组中的第一个值是否为[tup[1] for tup in BG_MENU_THEME if tup[0] == "8"][0]。如果是，则打印该元组的第二个值。

Answer 4

BG_MENU_THEME = [
                    ('1','#031B4D','Blue Ocean'),
                    ('2','#303E4D','Grayish blue'),
                    ('3','#062847','Ghibli Ocean  Drak 1'),
                    ('4','#00122e','Ghibli Ocean  Drak 2'),
                    ('4','#00122e','Ghibli Ocean  Drak 2'),
                    ('5','#115478','Ghibli Ocean - Ligit'),
                    ('6','#243447','Twitterish Color'),
                    ('7','#152324','Dark Forrest'),
                    ('8','#11202F','Dark Blue Original'),
                    ('99','','_None')
]

BackgroundColor = '' # give it a default value

ColorIndex = '8'
res  = [row[1] for row in BG_MENU_THEME if row[0]==ColorIndex and row[1]]

if len(res) == 1:
    BackgroundColor = res.pop()

print(BackgroundColor)
# #11202F

Answer 5

尝试以下代码：

BG_MENU_THEME = [
                ('1','#031B4D','Blue Ocean'),
                ('2','#303E4D','Grayish blue'),
                ('3','#062847','Ghibli Ocean  Drak 1'),
                ('4','#00122e','Ghibli Ocean  Drak 2'),
                ('4','#00122e','Ghibli Ocean  Drak 2'),
                ('5','#115478','Ghibli Ocean - Ligit'),
                ('6','#243447','Twitterish Color'),
                ('7','#152324','Dark Forrest'),
                ('8','#11202F','Dark Blue Original'),
                ('99','','_None')
            ]
colorId = '8'
result = None
for data in BG_MENU_THEME:
   if data[0] == colorId:
      result = data[1]
if result:
   print(result)
else:
   print(BG_MENU_THEME[-1][1])

如何从python中的元组列表中获取Value？

5 个答案: