key-value

来源： https://stackoverflow.com/questions/64692736/how-to-print-out-different-values-from-same-key

来源： https://stackoverflow.com/questions/64692736/how-to-print-out-different-values-from-same-key

问题 I would like to iterate over a dictionary, and append each key (letter) repeated by the number of times of its value (frequency) to a new list. For example: input: {'A':1, 'B':2} . Expected output: ['A', 'B', 'B'] What I'm doing is not working. What do I write in my function to do this? def get_freq_dict(): freq_dict = {'J' : 1, 'K' : 1, 'Q' : 1, 'X' : 1, 'Z' : 1,\ 'B' : 2, 'C' : 2, 'F' : 2, 'H' : 2, 'M' : 2, 'P' : 2,\ 'V' : 2, 'W' : 2, 'Y' : 2, '' : 2,\ 'G' : 3, 'D' : 4, 'L' : 4, 'S' : 4, 'U

问题 I would like to iterate over a dictionary, and append each key (letter) repeated by the number of times of its value (frequency) to a new list. For example: input: {'A':1, 'B':2} . Expected output: ['A', 'B', 'B'] What I'm doing is not working. What do I write in my function to do this? def get_freq_dict(): freq_dict = {'J' : 1, 'K' : 1, 'Q' : 1, 'X' : 1, 'Z' : 1,\ 'B' : 2, 'C' : 2, 'F' : 2, 'H' : 2, 'M' : 2, 'P' : 2,\ 'V' : 2, 'W' : 2, 'Y' : 2, '' : 2,\ 'G' : 3, 'D' : 4, 'L' : 4, 'S' : 4, 'U

问题 I'm using WEB API to receive the request from the Client application to save the Contact Information and I need to send the Error Message only if data has an error otherwise nothing TODO Early I Used Dictionary For Example: Dictionary<string, string> error = new Dictionary<string, string> { {"SaveContactMethod_1", "FirstName Invalid"}, {"SaveContactMethod_2", "LastName Invalid"}, {"SaveContactMethod_3", "MiddleName Invalid"}, } the respective JSON Object is { "error" : { "SaveContactMethod_1"

问题 Ok so I am given two columns A S A T A Z B F B G B P B U C D C P C R D M E H F S H U The 1st column is a list of points, and the second column is the list of the neighbors of the points. I would like to make it a dictionary so that {A:'S','T','Z', B:'F','G','P' etc} and so on. What I have tried doing is this, given that the text file is the two columns. edges = open('romEdges.txt') edgeslist = edges.read().split() edgeskeys = edgeslist[::2] edgesvalues = edgeslist[1::2] dictionary = {} for

问题 Ok so I am given two columns A S A T A Z B F B G B P B U C D C P C R D M E H F S H U The 1st column is a list of points, and the second column is the list of the neighbors of the points. I would like to make it a dictionary so that {A:'S','T','Z', B:'F','G','P' etc} and so on. What I have tried doing is this, given that the text file is the two columns. edges = open('romEdges.txt') edgeslist = edges.read().split() edgeskeys = edgeslist[::2] edgesvalues = edgeslist[1::2] dictionary = {} for

问题 As suggested in comments from Key: value store in Python for possibly 100 GB of data, without client/server and in other questions, SQLite could totally be used as a persistent key:value store. How would you define a class (or just wrapper functions) such that using a key:value store with SQLite would be as simple as: kv = Keyvaluestore('/test.db') kv['hello'] = 'hi' # set print(kv['hello']) # get print('blah' in kv) # answer: False because there's no key 'blah' in the store kv.close() ? 回答1:

问题 As suggested in comments from Key: value store in Python for possibly 100 GB of data, without client/server and in other questions, SQLite could totally be used as a persistent key:value store. How would you define a class (or just wrapper functions) such that using a key:value store with SQLite would be as simple as: kv = Keyvaluestore('/test.db') kv['hello'] = 'hi' # set print(kv['hello']) # get print('blah' in kv) # answer: False because there's no key 'blah' in the store kv.close() ? 回答1:

问题 I have an array of key/value pairs. The keys are sometimes duplicated, and the values are always unique per key. I want to condense each unique key to an object, so that I have a key and an array of the associated values as a property. Are there any handy javascript functions to do this? This pairArray = [ { key: "a", value: "1" }, { key: "a", value: "2" }, { key: "b", value: "1" }, { key: "b", value: "2" }, ]; Becomes objectArray = [ { key: "a", values: ["1", "2"] }, { key: "(", values: ["1"