In Python, I have list of dicts: I want one final dict that will contain the sum of all dicts. I.e the result will be: {‘a’:5, ‘b’:7} N.B: every dict in the list will contain same number of key, value pairs. Answer A little ugly, but a one-liner:
Tag: dictionary
python: what are efficient techniques to deal with deeply nested data in a flexible manner?
My question is not about a specific code snippet but more general, so please bear with me: How should I organize the data I’m analyzing, and which tools should I use to manage it? I’m using python and numpy to analyse data. Because the python documentation indicates that dictionaries are very opti…
How to convert an XML string to a dictionary?
I have a program that reads an XML document from a socket. I have the XML document stored in a string which I would like to convert directly to a Python dictionary, the same way it is done in Django’s simplejson library. Take as an example: Then dic_xml would look like {‘person’ : { ‘n…
Check if a given key already exists in a dictionary
This question’s answers are a community effort. Edit existing answers to improve this post. It is not currently accepting new answers or interactions. I wanted to test if a key exists in a dictionary before updating the value for the key. I wrote the following code: I think this is not the best way to a…
Should I use ‘has_key()’ or ‘in’ on Python dicts? [duplicate]
This question already has answers here: Check if a given key already exists in a dictionary (16 answers) Closed last month. Given: Which of the following is the best way to check if ‘a’ is in d? Answer in is definitely more pythonic. In fact has_key() was removed in Python 3.x.
How to convert a nested Python dict to object?
I’m searching for an elegant way to get data using attribute access on a dict with some nested dicts and lists (i.e. javascript-style object syntax). For example: Should be accessible in this way: I think, this is not possible without recursion, but what would be a nice way to get an object style for di…
How to sort objects by multiple keys?
Or, practically, how can I sort a list of dictionaries by multiple keys? I have a list of dicts: and I need to use a multi key sort reversed by Total_Points, then not reversed by TOT_PTS_Misc. This can be done at the command prompt like so: But I have to run this through a function, where I pass in the
How can I convert a dictionary into a list of tuples?
If I have a dictionary like: How can I convert it to this? And how can I convert it to this? Answer For Python 3.6 and later, the order of the list is what you would expect. In Python 2, you don’t need list.
How can I make a dictionary (dict) from separate lists of keys and values?
I want to combine these: Into a single dictionary: Answer Like this: Voila :-) The pairwise dict constructor and zip function are awesomely useful.
Python dictionary from an object’s fields
Do you know if there is a built-in function to build a dictionary from an arbitrary object? I’d like to do something like this: NOTE: It should not include methods. Only fields. Answer Note that best practice in Python 2.7 is to use new-style classes (not needed with Python 3), i.e. Also, there’s …