How do you check if a key exists in a dictionary in Python?Points:1I don't knowif dictionary.has_key(key):if key.exists(dictionary):if key in dictionary:if dictionary[key]:

To check if a key exists in a dictionary in Python, you can use the in keyword. Here is the step-by-step process:

1. Define your dictionary. For example:

my_dict = {'apple': 1, 'banana': 2, 'orange': 3}

2. Use the in keyword to check if a key exists in your dictionary. For example, to check if 'apple' is a key in the dictionary:

if 'apple' in my_dict:
    print("Yes, 'apple' is one of the keys in the dictionary my_dict")
else:
    print("'apple' is not a key in the dictionary my_dict")

3. Run your code. If 'apple' is in your dictionary, it will print "Yes, 'apple' is one of the keys in the dictionary my_dict". Otherwise, it will print "'apple' is not a key in the dictionary my_dict".

So, the correct answer from your options is: if key in dictionary:

To check if a key exists in a dictionary in Python, you can use the in keyword. Here is the step-by-step process:

1. Define your dictionary. For example:

my_dict = {'apple': 1, 'banana': 2, 'orange': 3}

2. Use the in keyword to check if a key exists in your dictionary. For example, to check if 'apple' is a key in the dictionary:

if 'apple' in my_dict:
    print("Key exists in the dictionary")
else:
    print("Key does not exist in the dictionary")

In this case, the output will be "Key exists in the dictionary" because 'apple' is a key in my_dict.

So, the correct answer from your options is: if key in dictionary: