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 optimized in python, and also due to the fact
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’ : { ‘name’ : ‘john’, ‘age’ : 20
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 accomplish this task. Is there
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 dicts? Answer Update: In Python 2.6
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 a difference between an ‘object’ and a