logo
down
shadow

Retrieving values from a paired key dictionary in Python


Retrieving values from a paired key dictionary in Python

By : user3099420
Date : January 11 2021, 03:32 PM
fixed the issue. Will look into that further You can create an optimised lookup table by traversing the dictionary once. Afterwards, you can directly look up partial keys:
code :
split_dicts = [{}, {}]
for key, value in paired_dict.items():
    head, tail = key.split(',')
    split_dicts[0].setdefault(head, []).append(value)
    split_dicts[1].setdefault(tail, []).append(value)

def lookup(key, index):
    return split_dicts[index][key]
>>> lookup('abc', 1)
[[1, 2, 3], [4, 5, 6]]
>>> lookup('456', 0)
[[4, 5, 6]]


Share : facebook icon twitter icon
Python: Error retrieving and modifying values in a dictionary using .append()?

Python: Error retrieving and modifying values in a dictionary using .append()?


By : SajuukOne
Date : March 29 2020, 07:55 AM
it fixes the issue The line d[ch] = d.get(ch,[]).append(1) sets d[ch] to the value returned by append function which is None. Do this instead:
code :
d[ch] = d.get(ch, [])
d[ch].append(1)
Python paired dictionary keys()

Python paired dictionary keys()


By : Spencer
Date : March 29 2020, 07:55 AM
it should still fix some issue itertools.combinations can come in handy
code :
d = {'Komp': ['values'], 'Forx': ['values'], 'Rove': ['values']}
from itertools import combinations
for x in combinations(d, 2):
   print x
Retrieving values from Python dictionary with different variable types

Retrieving values from Python dictionary with different variable types


By : Christian
Date : March 29 2020, 07:55 AM
hope this fix your issue In a dictionary such as: , you can use list comprehension
code :
[x["novel"] for x in dict if x["author"] == author_name]
[x["novel"] for x in dict]
Create a graph of authors as edge list from paired dictionary keys in python

Create a graph of authors as edge list from paired dictionary keys in python


By : Elvin Mclean
Date : March 29 2020, 07:55 AM
I wish this help you You can use list slicing on the dict.keys() in combination with zip() to get your tuples to put into your graph:
code :
authors = {'a1': ' A-ming Hao',
           'a2': ' Qing-zhen Wang',
           'a3': ' Xiao-long Li',
           'a4': ' Ming-da Zhai'}

keys = list(authors .keys())

# zip keys with itself - rotated by 1 element
tups = list(zip(keys, keys[1:]+keys[0:1]))

print(tups)
[('a1', 'a2'), ('a2', 'a3'), ('a3', 'a4'), ('a4', 'a1')]
g = nx.Graph()
for a,b in tups:
    g.add_edge(authors[a], authors[b])
What is the proper way to flatten a dictionary in Python, so that each key and list element is paired up?

What is the proper way to flatten a dictionary in Python, so that each key and list element is paired up?


By : Debu Sinha
Date : March 29 2020, 07:55 AM
I hope this helps you . You can't have duplicate keys in a dictionary. You can turn it until a flat list of key-value objects with nested loops:
code :
result = []
for key, l in my_dict.items():
    for obj in l:
        result.append({"key": key, "value": obj})
[{"key": "first_key", "value": {}},
 {"key": "first_key", "value": {}},
 {"key": "second_key", "value": {}},
 ...
]
Related Posts Related Posts :
  • Tuning the hyperparameter with gridsearch results in overfitting
  • some coordinates that I extracted from geocoder in Python are not saving in the variable I created
  • 7C in cs circles- python Im not sure what is wrong with this yet
  • How to fix 'AttributeError: 'list' object has no attribute 'shape'' error in python with Tensorflow / Keras when loading
  • python - thread`s target is a method of an object
  • Retrieve Variable From Class
  • What is the reason for matplotlib for printing labels multiple times?
  • Why would people use ThreadPoolExecutor instead of direct function call?
  • When clear_widgets is called, it doesnt remove screens in ScreenManager
  • Python can't import function
  • Pieces doesn't stack after one loop on my connect4
  • How to change font size of all .docx document with python-docx
  • How to store a word with # in .cfg file
  • How to append dictionaries to a dictionary?
  • How can I scrape text within paragraph tag with some other tags then within the paragraph text?
  • Custom entity ruler with SpaCy did not return a match
  • Logging with two handlers - one to file and one to stderr
  • How to do pivot_table in dask with aggfunc 'min'?
  • This for loop displays only the last entry of the student record
  • How to split a string by a specific pattern in number of characters?
  • Python 3: how to scrape research results from a website using CSFR?
  • Setting the scoring parameter of RandomizedSeachCV to r2
  • How to send alert or message from view.py to template?
  • How to add qml ScatterSeries to existing qml defined ChartView?
  • Django + tox: Apps aren't loaded yet
  • My css and images arent showing in django
  • Probability mass function sum 2 dice roll?
  • Cannot call ubuntu 'ulimit' from python subprocess without using shell option
  • Dataframe Timestamp Filter for new/repeating value
  • Problem with clicking select2 dropdownlist in selenium
  • pandas dataframe masks to write values into new column
  • How to click on item in navigation bar on top of page using selenium python?
  • Add multiple EntityRuler with spaCy (ValueError: 'entity_ruler' already exists in pipeline)
  • error when replacing missing ')' using negative look ahead regex in python
  • Is there a way to remove specific strings from indexes using a for loop?
  • select multiple tags by position in beautifulSoup
  • pytest: getting AttributeError: 'CaptureFixture' object has no attribute 'readouterror' capturing stdout
  • Shipping PyGObject/GTK+ app on Windows with MingW
  • Python script to deduplicate lines in multiple files
  • How to prevent window and widgets in a pyqt5 application from changing size when the visibility of one widget is altered
  • How to draw stacked bar plot from df.groupby('feature')['label'].value_counts()
  • Python subprocess doesn't work without sleep
  • How can I adjust 'the time' in python with module Re
  • Join original np array with resulting np array in a form of dictionary? multidimensional array? etc?
  • Forcing labels on histograms in each individual graph in a figure
  • For an infinite dataset, is the data used in each epoch the same?
  • Is there a more efficent way to extend a string?
  • Is it possible to do this loop in a one-liner?
  • invalid literal for int() with base 10: - django
  • Why does my code print a value that I have not assigned as yet?
  • the collatz func in automate boring stuff with python
  • How to find all possible combinations of parameters and funtions
  • about backpropagation deep neural network in tensorflow
  • Sort strings in pandas
  • How do access my flask app hosted in docker?
  • Replace the sentence include some text with Python regex
  • Counting the most common element in a 2D List in Python
  • logout a user from the system using a function in python
  • mp4 metadata not found but exists
  • Django: QuerySet with ExpressionWrapper
  • shadow
    Privacy Policy - Terms - Contact Us © festivalmusicasacra.org