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1. Top results related to how to get a key from a dictionary in python?

   • How to get the key from value in a dictionary in Python?

     Top Answer

     Answered Aug 11, 2017 · 38 votes

     You can write a list comprehension to pull out the matching keys.

     print([k for k,v in a.items() if v == b])-

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     1/5

   • How to get a dictionary name from a list in python

     Top Answer

     Answered Feb 17, 2015 · 3 votes

     I guess, what you really want is, to select between n different dicts.

     Eval would work of course, but would be bad style and have bad performance.

     I would recommend a dict of dicts -- something like that:

     MasterDict = {}MasterDict['game50and25'] = { 'date': [1996,9,6], 'range': [50,25], 'arrayname': ['draw50and25'] }

     You can put as many dicts into the MasterDict as you like.

     To access one:

     MasterDict[iWantTheDictName]['range']-

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     2/5

   • How to get position of key in a dictionary in python

     Top Answer

     Answered Mar 02, 2018 · 21 votes

     As of Python 3.6, dictionaries now preserves the insertion order. So using Python 3.6+, you could get the index by converting the dict_keys to a list.

     dictionary = {'test':{1,3}, 'test2':{2}, 'test3':{2,3}}-if 'test' in dictionary: print(list(dictionary).index('test'))

     As another example, the following demonstrates how to find the index for a few keys of interest.

     key_list = list(dictionary)keys_of_interest = ['test2', 'test3']-for key in keys_of_interest: print('key: {}, index: {}'.format(key, key_list.index(key)))

     The output from this would be

     key: test2, index: 1key: test3, index: 2-

     Other Answers

     Answered Mar 02, 2018 · 14 votes

     For Python <3.6, you cannot do this because dictionaries in Python have no order to them, so items don't have an index. You could use an OrderedDict from the collections library instead though, and pass it a tuple of tuples:

     >>> import collections>>> d = collections.OrderedDict((('test',{1,3}),('test2',{2}),('test3',{2,3})))>>> d.keys().index('test3') # Replace with list(d.keys()).index("test3") for Python 32

     Other Answers

     Answered Mar 18, 2016 · 3 votes

     You can just build an index :

     ind= {k:i for i,k in enumerate(dictionary.keys())}-

     then ind['test3'] will be 2, with O(1) access time.

     This is robust while keys are fixed. If you add/remove keys, you have to rebuild the index.

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     3/5

   • How to get a particular key value pair from a dict in Python

     Top Answer

     Answered May 17, 2022 · 0 votes

     You could do out = {elem:d[elem] for idx,elem in enumerate(d) if idx in [0,1]} to select the indexes in [0,1] but dict([list(d.items())[1]]), as metioned by @Anetropic, works fine as well.

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     4/5

   • How to delete an empty string key from a dictionary in python?

     Top Answer

     Answered Sep 16, 2021 · 4 votes

     Since you are already creating a deepcopy, you may benefit by simply iterating over the keys and removing the unnecessary keys with a if condition.

     Try this -

     new_dict = {k:v for k,v in data.items() if k!=''}print(new_dict)-

     {'id': '213', 'first_name': 'john', 'last_name': 'doe'}-

     As the error trace mentions quite clearly, the reason for the error in the following code is because you are modifying the dictionary during iteration.

     for x, y in data.items(): if x == "": del data[x] #<----

     Instead, as mentioned by some other excellent answers (@tituszban), you should just use del data[''] directly.

     Check all answers on Stack Overflow

     5/5

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2. Videos

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     Python Tutorial for Beginners 5: Dictionaries - Working with Key-Value Pairs

     May 17, 2017

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     datagy.io

     Python: Get Dictionary Key with the Max Value (4 Ways) • datagy

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     How to get a key from a value in Python

     Jun 6, 2018

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3. dnmtechs.com › sorting-a-python-dictionary-by-keySorting a Python Dictionary by Key Values in Python 3

   dnmtechs.com › sorting-a-python-dictionary-by-key

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   10 hours ago · In this article, we will explore various methods to sort a Python dictionary by key values in Python 3. Method 1: Using the sorted() Function. The simplest way to sort a dictionary by its keys is by using the built-in sorted() function. This function takes an iterable as input and returns a new sorted list.

4. stackoverflow.com › questions › 78578552python - Extract certain dictionary values from a list of ...

   stackoverflow.com › questions › 78578552

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   10 hours ago · How can I remove a key from a Python dictionary? 1758 Selecting multiple columns in a Pandas dataframe. Load 7 more related ...

5. solutionfall.com › question › how-can-you-extractHow can you extract specific dictionary values from a list of ...

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   10 hours ago · I have a dataframe where one column contains a list of dictionary key-value pairs. html I have a dataframe where one column contains a list of dictionary key-value pairs. Trip number location airlines 13452 [{'Name': 'Japan', 'City': 'Tokyo', 'Continent': 'Asia'}, British Airways {'Name': 'United Kingdom', 'City': ...

6. www.geeksforgeeks.org › how-to-play-random-mp3How to Play Random mp3 from a Folder in Python - GeeksforGeeks

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   10 hours ago · Python. import os import random import pygame. Step 2: Initialize Pygame Mixer. Pygame’s mixer module is used for loading and playing sounds. We need to initialize it before we can use it. Python. pygame.mixer.init() Step 3: Define the Folder Path. Next, specify the path to the folder containing your MP3 files.

7. blog.apify.com › scrape-linkedin-with-pythonHow to scrape LinkedIn with Python - blog.apify.com

   blog.apify.com › scrape-linkedin-with-python

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   10 hours ago · To run your scraper, insert the following command in your terminal: python src/__main__.py. Bash. LinkedIn scraper run. Next, we'll go through how to export the scraped data to a CSV file. 6. Exporting scraped LinkedIn data to a CSV file.

8. dtnavi.tcdigital.jp › cat_system › language_155PythonのKeyErrorとは？原因と対策 | デジタルトレンドナビ

   dtnavi.tcdigital.jp › cat_system › language_155

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   10 hours ago · PythonのKeyErrorは、特に辞書型データを扱う際に頻繁に遭遇するエラーの一つです。. 辞書はキーと値のペアを管理するデータ構造であり、特定のキーを使用して対応する値にアクセスします。. しかし、存在しないキーを使用しようとするとKeyErrorが発生し ...

9. www.trycatchdebug.net › news › 1284272Python: Array Integer Check Fails with Duplicates

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   10 hours ago · We have also covered some key concepts, such as sorting and hashing, and how they can be used to solve this problem. By using sorting or hashing, we can efficiently check for duplicates in an array of integers with a time complexity of O(n log n) or O(n), respectively. References. Python Sequence Types. Python Set Types. Sorting Algorithms ...