WebUnfortunately, there is still no dedicated method to index into keys () / values () of the dictionary, so getting the first key / value in the dictionary can be done as first_key = list (colors) [0] first_val = list (colors.values ()) [0] or alternatively (this avoids instantiating the keys view into a list): Web13 Answers Sorted by: 166 There already exists a function for this: from operator import itemgetter my_dict = {x: x**2 for x in range (10)} itemgetter (1, 3, 2, 5) (my_dict) #>>> (1, 9, 4, 25) itemgetter will return a tuple if more than one argument is passed. To pass a list to itemgetter, use itemgetter (*wanted_keys) (my_dict)
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WebAug 29, 2013 · 2 Answers. Sorted by: 2. It is much easier to have python do the lookup for you. Ignoring empty lines for now: elements = [] for line in open ("periodic_table.txt"): elements.append (line [3:]) You can then do a lookup like this: if answer.isdigit (): print elements [int (answer)] else: print elements.index (answer) Webdict_keys(['brand', 'model', 'year']) ... イラストレーター レイヤー グループ 解除
How to call method keys in Python 3 - Stack Overflow
WebOct 25, 2015 · Given that it is a dictionary you access it by using the keys. Getting the dictionary stored under "Apple", do the following: >>> mydict ["Apple"] {'American': '16', 'Mexican': 10, 'Chinese': 5} And getting how many of them are American (16), do like this: >>> mydict ["Apple"] ["American"] '16' Share Improve this answer Follow WebFeb 2, 2016 · EAFP is great. And exception handling in Python is very efficient: it's faster than the equivalent if-based code when the exception isn't raised.However, it's considerably slower if the exception is raised. And in this case, it looks like the simple string values in the OP's switcher dict will be used more often than the function values, so using try:... except … イラストレーター レイヤー 結合 ipad