I would like to process this json data in python: I would like to get the value of all “chain”s. For example like this: I tried with a for loop, but (in the case of several “chain”s) it returns only the last value of “chain” for example ACH BEP20. Does not return ACH ERC20.…
Tag: key
Filter Json Keys that contains certain character in Python
I need to filter all Keys in this dict (book-1, book-2 and book-3) that conatains the string ‘book’and save them in a new dict. In this example no need to seave ‘bicycle’. Answer This can be accomplished with a dict comprehension, which can be updated based on your needed filter:
How to write dict in file with specific format and headers?
I have a dict: I need to write this data into file line by line in the following format: How to do that using Python? Answer You can change dictionary1 to dictionary2 for other values.
max(*args, key = … ). How to modify key to get just certain values?
I am a bit confused with max(*args, key = ..) function. Imagine I have a following list: my_list = [2, 3, 4, -5, -2, -1]. I want to find maximum value within the negative values in my_list. For this, I am using the following code max(my_list, key = lambda x: x<0), but it gives me -5. Can you please explain
Check if key-value combinations can be found in Python dict
I am looking for a function found_in_color_dict() which tells me if a certain key-value combination can be found in color_dict. The function returns True or False, respectively. Based on the example I would expect the following results: I can only think of complex approaches to solve this problem. But I guess…
How to use key in the sort function in this situation (Python)?
I have a list like this: Now I want to sort it, but by the number, not by the word. If I just use l.sort() it just sorts by alphabetically. My desired output should be sth like (d,0)(c,1)(a,2)(b,4) I tried l.sort(key = l[0][1]) but it won’t work too (l[0][1] actually refer to number 2, which is the seco…
Mifare 4K change of keys in trailing block returns error “99” using ACR1252 and pyscard
We receive Mifare 4k cards from a supplier who pre-encodes each sector trailer as follows: In doing so, the supplier sets the access bit to FF0780 and the read key (Key A) and write key (Key B) remain the factory default FFFFFFFFFFFF When attempting to write a new read key(Key A) and write key (Key B) and acc…
Error when transforming (and reversing) Tuple Tuple to dict
I am trying to transform following tuple tuple into a dict (and a reversed one of that): This is the code I use: And I receive the following error: TypeError: unhashable type: ‘list’ How should I do this? Thank you a lot! Answer you are right, lists cannot be used as keys in python dict because ke…
How to access first n characters of a key value in Python
I need to access the first 10 characters of a key-value in dictionary. My dictionary looks like this: I have tried: The desired output is: Answer Why are you using a loop? You can do this directly:- Output:-
Return copy of dictionary excluding specified keys
I want to make a function that returns a copy of a dictionary excluding keys specified in a list. Considering this dictionary: A call to without_keys(my_dict, [‘keyB’, ‘keyC’]) should return: I would like to do this in a one-line with a neat dictionary comprehension but I’m havin…