dictionary

问题 I'm new with Python, coming from Perl where I've used something like this very often: #!/usr/bin/env perl my %d; my $a = 12; $b = 14; $c = 16; $d{$a}{$b}{$c} = 42; print($d{$a}{$b}{$c}); # 42 How can fill a dictionary in python e.g. in a loop If I try this with Python, I've got a KeyError a = 12 b = 14 c = 16 my_dict[a][b][c] = 42 # KeyError Is this the only way? if a in my_dict: if b in my_dict[a]: my_dict[a][b][c] = 42 else: my_dict[a][b] = {} my_dict[a][b][c] = 42 else: my_dict[a] = {} my

问题 I wrote the code below and it is running. When the loop run a fourth time, it gives an error. It gives "IndexError: list index out of range". How do I fix this error? import yfinance as yf dow_list = ['AAPL', 'AXP', 'BA', 'CAT', 'CSCO', 'CVX', 'DIS', 'DOW', 'GS', 'HD', 'IBM', 'INTC', 'JNJ', 'JPM', 'KO', 'MCD', 'MMM', 'MRK', 'MSFT', 'NKE', 'PFE', 'PG', 'RTX', 'TRV', 'UNH', 'V', 'VZ', 'WBA', 'WMT', 'XOM'] rows = [] for ticker in dow_list: stk_container = yf.Ticker(ticker) stk_info = stk

问题 I have a dictionary as :- { (1, 1): 16, (1, 2): 16, (1, 3): 16, (1, 4): 16, (2, 1): 24, (2, 2): 24, (2, 3): 24, (2, 4): 24 } ...i want it to be ordered as per tuple key's second field as well as dictionary's value field... so result dictionary should be :- { (2, 1): 24, (2, 2): 24, (2, 3): 24, (2, 4): 24, (1, 1): 16, (1, 2): 16, (1, 3): 16, (1, 4): 16 } ... i tried sorting it with value alone but it messes the keys tuple order.... yes so i assigned it to a list afterwards by doing ... list =

问题 in my neural network, I want to normalize words of a text. It means words get converted to infinitives and gender independent. Example: "Unternehmensgruppenführer" (german) gets 3 words: unternehmen gruppe fahren. This requires a lot of "startsWith" processing. I built a table that gives me word=>infinitive and loads it into a sorted(!) dictionary of length 400k. However, the processing of that dictionary by finding words in words got very slow. I optimized that with an implementation of

问题 I have two given classes SgFormsBase and QuestionBase with slightly different member names, and I want to translate observable[] of one to the other. import { of, Observable } from 'rxjs' import { map} from 'rxjs/operators' class SgFormsBase{ constructor( public id: number, public survey: string ){} } class QuestionBase{ constructor( public qid: number, public qsurvey: string ){} } const a = new SgFormsBase(11, 'Endo') const b = new SgFormsBase(12, 'Kolo') const sg = of([a, b] ) function

问题 I have a pyspark dataframe like the example df below. It has 3 columns in it organization_id, id, query_builder. The query_builder column contains a string that's similar to a nested dict. I would like to parse the query_builder field into separate columns for the field, operator, and value. I've supplied an example desired output below. If need be I could convert the pyspark dataframe to a pandas dataframe to make it easier. Does anyone have suggestions or recognize the type of data in the

问题 Good Day. I have managed to load a dictionary from a text file with this code: def loadDictFile(data_folder): critDict = json.loads(open(data_folder+'critDict3.txt').read()) print('json_data is', critDict) return critDict And I can create a tkinter UI with checkboxes that are on or off according to the dictionary values using the following code: def makeUI(data_folder, critDict): top = Tk() varList=[] for key, val in critDict.items(): myVar = IntVar()#create intVar for this checkbutton

问题 I'm getting to know hyperledger composer angular apps. This piece of code that yeoman generator produces puzzle me. The add method executes return this.http.post and it returns a response object, that is chained to a map operator to convert to json output. But all references I could find to map operator show that its argument must be specified, like an arrow function (v)=> {some instructions to perform on v here}); , or as an anonymous function (f(v){some instructions here}) ; I've seem the

问题 I have created a dictionary to combine several bits of data for one event. For example, NameA can have four entries depending on the value in column 5. It can be A, B, C, D. However i would like to display all this information from A, B, C, D on one row in a table for NameA as the end product. So i have created a dictionary with a class module to show this, with the class listing all possible variables to display in final output. Depending on the entries (A, B, C, D) the value in column 1 can

问题 I'm working with dictionaries and I have the following error '>' not supported between instances of 'dict' and 'dict' I know that there are some problems with dictionaries in Python 2.7 and 3.x version. print("number of nodes %d" % G.number_of_nodes()) print("number of edges %d" % G.number_of_edges()) print("Graph is connected?: %s" % nx.is_connected(G)) print("Number of connected components: %s" % nx.number_connected_components(G)) print("Size of connected componnents: %s" % [len(cc) for cc