CODEWITHSUNDEEP
pythontuples
Houy Narun
Houy Narun

Reputation: 1725

How to get Value out of list of tuple in python?

I have a list of tuple of key index, color code, and color name as like this:

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')
                ]

Given colorIndext='8', how can I get color code '#11202F' ? not to say BG_MENU_THEME[8][1] because it will raise an error out of index if colorIndex='99'.

I tried:

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

and got SyntaxError: invalid syntax

Please kindly help advise me on this ? Thanks

Upvotes: 0

Views: 407

Answers (5)

RoadRunner
RoadRunner

Reputation: 26315

Using a dictionary also works:

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

You could also keep BG_MENU_THEME as a dictionary beforehand, then no transformation stage is needed.

Upvotes: 1

Arghya Saha
Arghya Saha

Reputation: 5713

Try this code:

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])

Upvotes: 0

vts
vts

Reputation: 911

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

Upvotes: 0

jh314
jh314

Reputation: 27802

Use a generator with next:

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

Upvotes: 3

Yang K
Yang K

Reputation: 437

for tup in BG_MENU_THEME:
    if tup[0] == "8":
        print (tup[1]) # background color.

or the short way: [tup[1] for tup in BG_MENU_THEME if tup[0] == "8"][0] if you really want to use list comprehension. You are using the syntax for a list comprehension when you are not actually using list comprehension. That's why it's raising an error.

Iterate through each tuple and check if first value in tuple is "8". If it is print the second value of that tuple.

Upvotes: 0

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