List of list to dictionary python
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In the previous article, we have discussed how to convert a list of dictionaries into a list of lists. In this article let’s discuss how to do the converse of this i.e. learn how to convert a list of lists into a list of dictionaries when a separate list that has the data of keys is given to us. Let us first understand this scenario with an example. We have a list named list_of_list with the following elements. Example: list_of_list= [['One', 'Two', 'Three'], ['Two', 'Three', 'Four']] Output: We have another list named dict_keys which has the keys for the list of dictionaries that we are creating. Example: dict_keys = [1,2,3] Output; We now have to get the output in this form which is a list of dictionaries. Example: [{1: 'One', 2: 'Two', 3: 'Three'}, {1: 'Two', 2: 'Three', 3: 'Four'}] Output: We can achieve this using two methods:
Before we learn these methods, having prior knowledge about list comprehension and dictionary comprehension is appreciated. So please refer to the articles below list comprehension Using list comprehension:We are using the dict() function along with the zip() function which will zip the values of elements in the list dict_keys and the lists in the list_of_list and store them in a list named list_of_dict. [ dict (zip(dict_keys, i)) for i in list_of_list ] Example: list_of_list= [['One', 'Two', 'Three'], ['Two', 'Three', 'Four']] dict_keys = [1,2,3] print("Given list of lists: " +str(list_of_lists)) print("The given keys are: " +str(dict_keys)) list_of_dict = [dict(zip(dict_keys, i)) for i in list_of_list ] print("The given keys are: " +str(list_of_dict)) Output: Using dictionary comprehension:The implementation is much similar to that of list comprehension. We use a zip() function here which again does the same task as above in the one-liner code using dictionary comprehension and stores it in a list named list_of_dict. list_of_dict = [{ k:v for k,v in zip(dict_keys, i) } for i in list_of_list] Example: list_of_list= [['One', 'Two', 'Three'], ['Two', 'Three', 'Four']] dict_keys = [1,2,3] print("Given list of lists: " +str(list_of_lists)) print("The given keys are: " +str(dict_keys)) list_of_dict = [{k:v for k,v in zip(dict_keys, i)} for i in list_of_list ] print("The converted list: " +str(list_of_dict)) Output: In this Python tutorial, we will discuss the Python convert dictionary to list. Here we will also cover the below examples:
By using .items() methodThe first method is dict. items() to convert a dictionary into the list. This method is used to iterate the elements of the dictionary. Using list() we will get all the items converted into the list. Example:
In the above code first, we will create a dictionary by using curly brackets and assign them key-values pairs. The con_lis variable needs to be converted into a list so that we can use the list() function and then store the result in the con_lis variable. Output: Python convert dictionary to listBy using .values() methodUse the dict.values() method we can easily get a list of values and to convert values to a list we can use the list() function Example: Let’s take an example and check how to convert a dictionary to a list
Here is the Screenshot of the following given code Python convert dictionary to list values methodBy using zip() functionIn this example, we can combine the zip(), keys(), and values method to convert a dictionary into a list. To create a list of tuples we can use the zip() function. The zip() function is mostly used in Python for combining two iterators. Here is the Source code
Here is the implementation of the following given code Python convert dictionary to list zip methodBy using .keys() methodThe keys() method is used to get the list of keys from the dictionary. To get the list of all keys we can combine the list() function with the keys() method. Example:
Output: Python convert dictionary to list keys methodBy using list comprehension methodTo create a list in Python we can use the list comprehension method. To collect the key values from the dictionary, we have to use dict.items() method and then add to the list. Example:
Check the execution of the following given code Python convert dictionary to list comprehension methodBy using map() functionThe map function will take a function and a sequence as a parameter and it applies that function to the iterables and returns a new list. In this example, you can combine the map and list function to convert the dictionary into a list. Source code:
Output: Python convert dictionary to list map functionThis is how to convert a dictionary to a list Python convert dictionary to list of key-value pairs
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Here is the implementation of the following given code Python convert dictionary to list of key-value pairsAnother way to convert a dictionary to a list including key-value pairs By using the list comprehension method we convert key-value pairs into the list. Example:
Here is the Screenshot of the following given code Python convert dictionary to list of key-value pairs comprehension methodRead: Convert string to float in Python Python convert dictionary to list of tuples
Example: Let’s take an example and check how to convert a dictionary into a list of tuples
Implementation: Python convert dictionary to list of tuplesAnother example to check how to convert a dictionary into a list of tuples By using the collection method we can initialize a named tuple function. This function creating tuple subclasses with name fields. Here is the Source code
Here is the Screenshot of the following given code OutputRead: Convert float to int Python Python convert dictionary to list of dictionariesBy using the list comprehension method we can iterate through each of the dictionary key-value pairs and convert the dictionary of the list to a list of dictionaries. Example:
Here is the execution of the following given code Python convert dictionary to list of dictionariesPython convert dictionary to list of valuesFor converting the values of a dictionary to a list. First, we will create a list where each key-value pair is a value from the dictionary. By using dict.values() method we can get a list of values. Code:
Output: Python convert dictionary to list of valuesRead: How to Convert DateTime to UNIX timestamp in Python Python convert dictionary to list of keysIn Python to convert the keys of a dictionary to a list. First, we have to declare a dictionary and insert it into key-value pairs. Now we will use dict.keys() method to get the list of keys from the dictionary. Example: Let’s take an example and check how to convert the keys of a dictionary into a list.
Output: Python convert dictionary to list of keysPython convert dict to list of pairsIn Python, a dictionary provides method items() which returns an iterable sequence of all elements from the dictionary. The items() method basically converts a dictionary to a list along with that we can also use the list() function to get a list of tuples/pairs. Example: Let’s take an example and check how to convert a dictionary into a list of pair
Here is the Screenshot of the following given code Python convert dict to list of pairsRead: How to convert dictionary to JSON in Python Python turn dictionary to list
Python convert nested dictionary to list
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Output: This is how to convert a nested dictionary to a listRead: How to Convert Python string to byte array Python convert dictionary list to string
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Here is the execution of the following given code Python convert dictionary list to stringPython convert dict of list to dataframe
By using pd.dataframe(data)Dataframe is two dimensional and the size of the data is mutable and it will display the result in the form of tabular data. Example:
Output: Python convert dict of the list to dataframeBy using pd.dataframe.from_dict(data)
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Here is the Screenshot of the following given code Python convert dict of the list to dataframe methodBy using index methodThe source code for this implementation is as follows:
Here is the execution of the following given code Python convert dict of list to dataframe index methodYou may also like reading the following articles.
In this Python tutorial, we have discussed the Python convert dictionary to list. Here we have also covered the following examples:
Python is one of the most popular languages in the United States of America. I have been working with Python for a long time and I have expertise in working with various libraries on Tkinter, Pandas, NumPy, Turtle, Django, Matplotlib, Tensorflow, Scipy, Scikit-Learn, etc… I have experience in working with various clients in countries like United States, Canada, United Kingdom, Australia, New Zealand, etc. Check out my profile. Can we convert list to dictionary in Python?You can convert a Python list to a dictionary using the dict. fromkeys() method, a dictionary comprehension, or the zip() method. The zip() method is useful if you want to merge two lists into a dictionary.
Is it possible to declare a list of dictionary and dictionary of list in Python?Note that the restriction with keys in Python dictionary is only immutable data types can be used as keys, which means we cannot use a dictionary of list as a key . But the same can be done very wisely with values in dictionary.
How do you convert a list to a keyFirst create an iterator, and initialize it to variable 'it'. Then use zip method, to zip keys and values together. Finally typecast it to dict type.
How do I convert a list to a dictionary in Python w3schools?The zip() function is an in-built function that takes iterators (can be zero or more), aggregates and combines them, and returns them as an iterator of tuples and the dict() function creates a new dictionary.
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