Python : How to create a list of all the Values in a dictionary ?
In this article we will discuss how to create a list of all the values in dictionary.
Suppose we have a dictionary of string and integers i.e.
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# Dictionary of string and int wordFreqDic = { "Hello": 56, "at" : 23 , "test" : 43, "this" : 2, "here" : 23, "city" : 2, } |
Now we want all the Values from above dictionary in a list i.e.
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[2, 43, 2, 23, 56, 23] |
Let’s see how to do that,
Create a list of all values in dict using dict.values()
In python, dictionary class provides a member function i.e.
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dict.values() |
It returns a view object / iterator to the list of all values in dictionary. We can use this object for iteration or creating new list.
Let’s use that to get the list of all values in the above dictionary.
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# Create a new list from the view object returned by values() dictValues = list (wordFreqDic.values()) |
dictValues content will be,
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[2, 43, 2, 23, 56, 23] |
Creating a list of duplicate values in dictionary
Suppose instead of all values we want a list of all duplicate values from the dictionary i.e.
[23 , 2]
Let’s do that using for loop i.e.
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''' Creating a list of dulicate values in dictionary ''' uniqueValues = list() duplicateValues = list() # Creating a list of all duplicate values in dictionary for x in wordFreqDic.values() : if x not in uniqueValues : uniqueValues.append(x) else: duplicateValues.append(x) print("List of Duplicate values in Dictionary" , duplicateValues) |
dictkeys content will be,
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[2, 23] |
Learn more about Dictionaries in Python,
- The Modern Python 3 Bootcamp
- The Python Bible Everything You Need to Program in Python
- Programming for Everybody (Getting Started with Python)
Complete example is as follows,
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def main(): # Dictionary of string and int wordFreqDic = { "Hello": 56, "at" : 23 , "test" : 43, "this" : 2, "here" : 23, "city" : 2, } print(wordFreqDic) ''' Creating a list of all values in dictionary ''' # Create a new list from the view object returned by values() dictValues = list (wordFreqDic.values()) print("List of values in Dictionary : ", dictValues) ''' Creating a list of dulicate values in dictionary ''' uniqueValues = list() duplicateValues = list() # Creating a list of all duplicate values in dictionary for x in wordFreqDic.values() : if x not in uniqueValues : uniqueValues.append(x) else: duplicateValues.append(x) print("List of Duplicate values in Dictionary" , duplicateValues) if __name__ == '__main__': main() |
Output:
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{'city': 2, 'test': 43, 'this': 2, 'at': 23, 'Hello': 56, 'here': 23} List of values in Dictionary : [2, 43, 2, 23, 56, 23] List of Duplicate values in Dictionary [2, 23] |
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