Get all keys from a dictionary in Python

Output

['math', 'physics', 'chemistry', 'dbms', 'programming']

We know that a Python dictionary stores data in key-value pairs. And we can access the values of the dictionary using the key name. Sometimes, we need to get all the keys to the dictionary as a list and we can access them using their index.

In this post, we will explain methods and techniques that can be used to get the keys of a dictionary as a List.

Get all keys from a dictionary using Dicitonary.keys() function

This is the simplest method to get all the keys from a dictionary. This is a dictionary method that extracts all the keys from the dictionary and then you can get the list using the list() function by passing the Dictionary.keys() to it as a parameter.

user = {
  "first_name": "Tony",
  "last_name": "Stark",
  "username": "tony001",
  "email": "to[email protected]"
}

result = list(user.keys())

print(result)

Output

['first_name', 'last_name', 'username', 'email']

Get all keys using Python For Loop

We can iterate over a dictionary using Python For Loop. In each iteration, we can append the key name to the list that we declare as a result.

# create a dictionary
my_dict = {
  "a": "1",
  "b": "2",
  "c": "3",
  "d": "4",
  "e": "5"
}

# declare a result varibale
result = []

# use for loop to get the keys
for key in my_dict:
  result.append(key)

# print the result
print(result)

Output

['a', 'b', 'c', 'd', 'e']