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In Python, how do you use .keys()?

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The keys must be of an immutable type (string, number, or tuple with immutable elements) and must be unique. Each key is separated from its value by a colon(:). An item has a key and a value is stated as a pair (key : pair).
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Empowering Python learners with practical expertise.

In Python, the keys() method is used to get a list of all the keys in a dictionary. Here's an example: my_dict = {'a': 1, 'b': 2, 'c': 3}keys_list = my_dict.keys()print(keys_list) # output: In this example, my_dict.keys() returns a list of all the keys in the my_dict dictionary, which are then assigned...
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In Python, the keys() method is used to get a list of all the keys in a dictionary. Here's an example:


my_dict = {'a': 1, 'b': 2, 'c': 3}

keys_list = my_dict.keys()

print(keys_list) # output: ['a', 'b', 'c']


In this example, my_dict.keys() returns a list of all the keys in the my_dict dictionary, which are then assigned to the keys_list variable. The print() function is used to display the contents of the keys_list variable.

Note that the keys() method returns a view object in Python 3.x, which is a dynamic view on the dictionary's keys that reflects any changes to the dictionary. In Python 2.x, keys() returns a list of the dictionary's keys.

You can use the keys() method to iterate over the keys of a dictionary using a for loop, like this:

 

my_dict = {'a': 1, 'b': 2, 'c': 3}

for key in my_dict.keys():
print(key)

 

This will print out each key in the my_dict dictionary on a separate line.

 


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Research Engineer with 20+years experience

In Python, .keys() is a method that can be used on a dictionary object to return a view object containing the keys of the dictionary. Here's an example of how to use it: # Create a dictionarymy_dict = {'name': 'John', 'age': 25, 'gender': 'Male'} # Get a view object containing the keys of the dictionary...
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In Python, .keys() is a method that can be used on a dictionary object to return a view object containing the keys of the dictionary. Here's an example of how to use it:

# Create a dictionary
my_dict = {'name': 'John', 'age': 25, 'gender': 'Male'}

# Get a view object containing the keys of the dictionary using .keys()
keys = my_dict.keys()

# Print the view object
print(keys)

Output: 

dict_keys(['name', 'age', 'gender'])

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