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1. Top results related to is a list of keyvaluepair a dictionary python

   • Python - Remove dictionary from a list of dictionaries if a particular value is not present

     Given a list of dictionaries, remove all dictionaries which don’t have K as a value.

     Examples:

     Input : test_list = [{"Gfg" : 4, "is" : 8, "best" : 9}, {"Gfg" : 3, "is": 7, "best" : 5}], K = 7 Output : [{'Gfg': 4, 'is': 8, 'best': 9}] Explanation : Resultant dictionary doesn't contain 7 as any element.

     Input : test_list = [{"Gfg" : 4, "is" : 7, "best" : 9}, {"Gfg" : 3, "is": 7, "best" : 5}], K = 7 Output : [] Explanation : All contain 7 as element in List. 

     Method #1 : Using loop + values()

     This is one of the ways in which this task can be performed. In this, we perform the task of iterating for all the dictionaries using a loop and check for value presence using values().

     Python3

     # Python3 code to demonstrate working of# Remove dictionary if K value not present# Using loop + values() # Initializing liststest_list = [{"Gfg": 4, "is": 8, "best": 9},             {"Gfg": 5, "is": 8, "best": 1},             {"Gfg": 3, "is": 7, "best": 6},             {"Gfg": 3, "is": 7, "best": 5}] # Printing original listprint("The original list : " + str(test_list)) # initializing KK = 7 res = [] # Checking for K element# using loopfor sub in...

     • Initialize an empty dictionary to store the filtered dictionaries.
     • Use a dictionary comprehension to iterate through each dictionary in the given list and filter out the dictionaries that have K as one of the values,
     • Print the resulting dictionary of filtered dictionaries.

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     1/5

   • Python: Build a list of dictionary out of a dictionary

     Top Answer

     Answered Feb 06, 2018 · 3 votes

     Python has a great function called zip that is perfect for this.

     EDIT: After re-reading your question you are already using zip! When iterating through the zipped values you just need to build up a list of each dict and use the final output however you need.

     input = { "data_source": "serial_number", "parameters": ["param_1", "param_2", "param_3"], "data_array": [ { "time": "time_stamp_1", "values": [1, 2, 3] }, { "time": "time_stamp_2", "values": [4, 5, 6] }, { "time": "time_stamp_3", "values": [7, 8, 9] }, { "time": "time_stamp_4", "values": [10, 11, 12] }, { "time": "time_stamp_5", "values": [13, 14, 15] }, { "time": "time_stamp_6", "values": [16, 17, 18] } ]}output = []for data in input['data_array']: zipped = zip(input['parameters'], data['values']) for parameter, value in zipped: output.append({ "serial": input['data_source'], "parameter": parameter, "time": data['time'], "parameter_value": value })print output

     Output:

     [ { 'parameter_value': 1, 'serial': 'serial_number', 'parameter': 'param_1', 'time': 'time_stamp_1' }, ...]

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     2/5

   • Python | Count number of items in a dictionary value that is a list

     In Python, dictionary is a collection which is unordered, changeable and indexed. Dictionaries are written with curly brackets, and they have keys and values. It is used to hash a particular key. A dictionary has multiple key:value pairs. There can be multiple pairs where value corresponding to a key is a list. To check that the value is a list or not we use the isinstance() method which is inbuilt in Python. isinstance() method takes two parameters:

     object - object to be checkedclassinfo - class, type, or tuple of classes and types

     It return a boolean whether the object is an instance of the given class or not. Let’s discuss different methods to count number of items in a dictionary value that is a list. Method #1 Using in operator 

     Python3

     # Python program to count number of items# in a dictionary value that is a list.def main():     # defining the dictionary    d = {'A' : [1, 2, 3, 4, 5, 6, 7, 8, 9],        'B' : 34,        'C' : 12,        'D' : [7, 8, 9, 6, 4] }     # using the in operator    count = 0    for x in d:if isinstance d x list...

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     3/5

   • Python: Convert a list of dictionary into a table

     Top Answer

     Answered Mar 11, 2020 · 6 votes

     Easiest is to use Pandas as described Convert list of Dictionaries to Dataframe

     Code

     import pandas as pd-my_dict = [ {'type' : 'type_1', 'prob' : 2, 'x_sum' : 3, 'y_sum' : 5}, {'type' : 'type_2', 'prob' : 3, 'x_sum' : 8, 'y_sum' : 6}]df = pd.DataFrame(my_dict)print(df)

     Output

     type prob x_sum y_sum0 type_1 2 3 51 type_2 3 8 6-

     Without Index Column

     df_no_indices = df.to_string(index=False)print(df_no_indices)-

     Output

     type prob x_sum y_sum type_1 2 3 5 type_2 3 8 6-

     Other Format Examples

     Source

     PostSQL

     from tabulate import tabulatepdtabulate=lambda df:tabulate(df,headers='keys',tablefmt='psql')print(pdtabulate(df))-+----+--------+--------+---------+---------+| | type | prob | x_sum | y_sum ||----+--------+--------+---------+---------|| 0 | type_1 | 2 | 3 | 5 || 1 | type_2 | 3 | 8 | 6 |+----+--------+--------+---------+---------+

     HTML

     pdtabulate=lambda df:tabulate(df,headers='keys',tablefmt='html')print(pdtabulate(df))-

     <table><thead><tr><th style="text-align: right;"> </th><th>type </th><th style="text-align: right;"> prob</th><th style="text-align: right;"> x_sum</th><th style="text-align: right;"> y_sum</th></tr></thead><tbody><tr><td style="text-align: right;"> 0</td><td>type_1</td><td style="text-align: right;"> 2</td><td style="text-align: right;"> 3</td><td style="text-align: right;"> 5</td></tr><tr><td style="text-align: right;"> 1</td><td>type_2</td><td style="text-align: right;"> 3</td><td style="text-align: right;"> 8</td><td style="text-align: right;"> 6</td></tr></tbody></table>

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     4/5

   • Python: Transform a Dictionary into a list of lists

     Top Answer

     Answered Sep 15, 2011 · 14 votes

     for key, value in my_dict.iteritems()-

     This will iterate through the dictionary, storing each key in key and each value in value. See the docs.

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     5/5

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2. datatofish.com › sort-dictionary-in-python-by-keysSort a Dictionary in Python by Keys – Data to Fish

   datatofish.com › sort-dictionary-in-python-by-keys

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   1 day ago · Function to sort a dictionary. Here is a function to sort a dictionary in Python by keys: Copy. def sort_dict_by_keys(my_dict: dict, reverse: bool = False) -> dict: """. Sorts a dictionary by its keys. Args: - my_dict (dict): The dictionary to be sorted. - reverse (bool, optional): If true, sorts the dictionary in descending order.

3. stackoverflow.com › questions › 78535857python - Why is it faster to iterate over dict keys when ...

   stackoverflow.com › questions › 78535857

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   22 hours ago · list : 5.110044667 set : 5.137189292 dict : 5.179844875000001 But if the values of the dict are objects instead of None , iterating over the dict keys is significantly faster:

4. People also ask

   How to get only dictionary keys in Python NumPy?

   • To get only the Dictionary keys to be stored or converted into an Array in Python NumPy, we can use the dict.key () function. The keys () method of a dictionary returns a view object that displays a list of all the values in the Python dictionary. "Miami": 77.0, "Denver": 50.9, "Seattle": 52.0, "Atlanta": 61.4, "Boston": 52.7

   How to Convert Python Dict to an Array [6 Examples ]

   pythonguides.com/python-convert-dictionary-to-an-array/

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   How do you get a list of keys in a dictionary?

   • The dictionary has two keys: “1” and “2”, which map to the values “USA” and “United Kingdom”, respectively. The “keys ()” method is then used to get a list of all the keys in the “country” dictionary, which are the country codes. The “keys ()” method returns a list-like object containing the keys of the dictionary.

   Key Index In Python Dictionary - Python Guides

   pythonguides.com/python-dictionary-index/

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   What is a Python dictionary?

   • A Python dictionary is an unordered data collection in a key-value pair format. Python NumPy Array: Unlike lists, NumPy arrays are homogeneous, meaning all elements are of the same type, a key feature that makes them suitable for mathematical operations. Now, let’s see some examples of how to convert a Python dict to an array:

   How to Convert Python Dict to an Array [6 Examples ]

   pythonguides.com/python-convert-dictionary-to-an-array/

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   How to retrieve a value using a key in Python?

   • The value is retrieved using the key as the index in square brackets, e.g. country [key]. The output of this code will be a list of the keys (country codes) and their corresponding values (country names). Read Python dictionary append with examples index () function: This function is used to find the index of an item in a list.

   Key Index In Python Dictionary - Python Guides

   pythonguides.com/python-dictionary-index/

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5. www.geeksforgeeks.org › different-ways-of-sortingDifferent ways of sorting Dictionary by ... - GeeksforGeeks

   www.geeksforgeeks.org › different-ways-of-sorting

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   5 days ago · // Initialize a dictionary const myDict = {1: 2, 3: 4, 4: 3, 2: 1, 0: 0}; // Convert the dictionary into an array of key-value pairs const items = Object. keys (myDict). map (key => [parseInt (key), myDict [key]]); // Sort the array based on the values items. sort ((a, b) => a [1]-b [1]); // Initialize an empty string to store the sorted ...

6. pythonguides.com › python-dictionary-indexHow To Find Python Dictionary Index - Python Guides

   pythonguides.com › python-dictionary-index

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   3 days ago · Finding Index of the Dictionary using List Comprehension. List comprehension is creating a new list from the existing iterable object. So here, you will use the enumerate() function with list comprehension to get the index of the key-value pair in the dictionary. For example, look at the logic below.

7. intellipaat.com › python-dictionaryPython Dictionaries - The Basics with Examples - Intellipaat

   intellipaat.com › python-dictionary

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   1 day ago · While adding or changing an existing value, we have to use keys. If the key already exists, then the value gets updated; if the key does not exist, then a new key-value pair is generated. Example: dict1 = {“Brand”:”gucci”,”Industry”:”fashion”,”year”:1921} print(dict1) #creating new key-value pair.

8. pythonguides.com › python-convert-dictionary-to-anHow To Convert Python Dict To Array - Python Guides

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   3 days ago · Converting Python Dict to Array using items () Method. The items () method of Python returns the tuple, so here, you will call it on the dictionary to convert the key-value pair into a tuple and then the tuple into a list using the list () method.

9. devcodef1.com › news › 1271619Finding a Value in Two Lists of Dicts Based on First Similarity

   devcodef1.com › news › 1271619

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   22 hours ago · common\_dicts = list(ip\_dict.values()) By using the first similarity between dictionaries in two lists, we can simplify the comparison process and find valuable insights in the data. The defaultdict class from the collections module can further simplify this process, allowing us to create a dictionary of dictionaries where the keys are the IP ...