25, Sep 20. If you call dict() on that iterator, then you can create the dictionary you need. Here is an example of a Python dictionary: Dictionaries are useful if you want to associate labels with each value. Python lists and dictionaries are two structures used to store data. You can convert a Python list to a dictionary using the dict.fromkeys() method, a dictionary comprehension, or the zip() method. If L1 and L2 are list objects containing keys and respective values, following methods can be used to construct dictionary object. We can use one list as the keys for the dictionary and the other as the values. # app.py stocks = ['reliance', 'infosys', 'tcs'] prices = [2175, 1127, 2750] new_dict = {stocks: prices for stocks, prices in zip(stocks, prices)} print(new_dict) Output Dictionaries use key:value pair to search if a key is present or not and if the key is present what is its value . Convert two lists into a dictionary in Python Python Server Side Programming Programming While a Python list contains a series of values a dictionary on the other hand contains a pair of values which are called key-value pairs. They do not modify the existing list. Python dictionary: Exercise-52 with Solution. Then, we used dictionary comprehension to run through each item in the fruits list. Access the elements using the [] syntax. Read our How to Learn Python guide. Thus the reduction creates one tuple containing … Examples: The dict.keys() is an inbuilt Python method that returns a list consists of keys of the dictionary. We can also use a technique called dictionary comprehension to convert a Python list to a dictionary using the same values. In this example, we have defined two lists that we need to convert into a dictionary. Lists and dictionaries are examples of Python collections. How to Use SQLAlchemy Core with SQLite in Python, Python os.walk() Method: How to Traverse a Directory Tree. James Gallagher is a self-taught programmer and the technical content manager at Career Karma. If you want to add to a list a copy instead of a reference, you can do it by using the copy function. James has written hundreds of programming tutorials, and he frequently contributes to publications like Codecademy, Treehouse, Repl.it, Afrotech, and others. Converting from each other is the most common task you ever face in Python development. He also serves as a researcher at Career Karma, publishing comprehensive reports on the bootcamp market and income share agreements. dict.items() – This function returns a copy of the dictionary’s list. We can use the above example to create a dictionary from two lists. Zip two lists and convert to dictionary using dict() function ChainMap. If we did not specify the value In stock in our code, the default value for the keys in our dictionary would be None. To convert a list to a dictionary using the same values, you can use the dict.fromkeys() method. Adding two tuples together makes one tuple containing all elements. To get Python dict keys to list, use the dict.keys() method. To do so, we can use the Python zip() function. The example joins two lists with zip and passes the iterable to the dict. The zip() method is useful if you want to merge two lists into a dictionary. See the following code example of a dictionary comprehension. dict.iteritems() – This function returns an iterator of the dictionary’s list. dictionary = {key: value for vars in iterable} See the following code example of a dictionary comprehension. A dictionary comprehension is similar to a list comprehension in that both methods create a new value of their respective data types. dict-like class for creating a single view of multiple mappings. 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