Nested defaultdict of defaultdict
Is there a way to make a defaultdict also be the default for the defaultdict? (i.e. infinite-level recursive defaultdict?)
recursion
Find all occurrences of a key in nested dictionaries and lists
I have a dictionary like this:
Python recursion with list returns None
def foo(a): a.append(1) if len(a) > 10: print a return a else: foo(a) Why this recursive function returns None (see transcript below)? I can’t quite understand what I am doing wrong. In [263]: x = [] In [264]: y = foo(x) [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] In [265]: print … Read more
Recursive code returns None
I really do not understand, why the code def isIn(char, aStr): ms = len(aStr)/2 if aStr[ms] == char: print 'i am here now' return True elif char>aStr[ms] and not ms == len(aStr)-1: aStr = aStr[ms+1:] elif char <aStr[ms] and not ms == 0: aStr = aStr[0:ms] else: return False isIn(char, aStr) print isIn('a', 'ab') does … Read more
Basics of recursion in Python
“Write a recursive function, “listSum” that takes a list of integers and returns the sum of all integers in the list”.
Regular expression to detect semi-colon terminated C++ for & while loops
In my Python application, I need to write a regular expression that matches a C++ for or while loop that has been terminated with a semi-colon (;). For example, it should match this:
Finding a key recursively in a dictionary
I’m trying to write a very simple function to recursively search through a possibly nested (in the most extreme cases ten levels deep) Python dictionary and return the first value it finds from the given key.
How to flatten a nested JSON recursively, with flatten_json
This question is specific to using flatten_json from GitHub Repo: flatten The package is on pypi flatten-json 0.1.7 and can be installed with pip install flatten-json This question is specific to the following component of the package: def flatten_json(nested_json: dict, exclude: list=[”], sep: str=’_’) -> dict: “”” Flatten a list of nested dicts. “”” out … Read more
recursive iteration through nested json for specific key in python
I’m trying to pull nested values from a json file. I want to print out each of the values for every “id” key. I think I’m close but can’t figure out why the obj type changes from a dict to a list, and then why I’m unable to parse that list.
Here is a link to the json I’m working with: http://hastebin.com/ratevimixa.tex
Recursion and return statements
I’m fairly new to Python and recursive functions as a whole, so pardon my ignorance.