How to Reset a Python Dictionary to Zero and Empty Existing Values?

To reset a Python dictionary to zero or empty existing values, you can use different approaches depending on your specific requirements. Here are a few methods you can use:

Reassignment: You can reset the dictionary values to zero or empty by reassigning the dictionary variable with a new empty dictionary or with zero values for each key. For example:

my_dict = {"key1": 10, "key2": 20, "key3": 30}

# Method 1: Reset values to zero
for key in my_dict:
    my_dict[key] = 0

# Method 2: Reset values to empty
my_dict = {}

In the first method, a loop iterates over each key in the dictionary, resetting the value to zero. In the second method, the dictionary variable is reassigned with an empty dictionary, effectively resetting all values to empty.

Using a dictionary comprehension: Another approach is to use a dictionary comprehension to create a new dictionary with the same keys but with zero or empty values. For example:

my_dict = {"key1": 10, "key2": 20, "key3": 30}

# Reset values to zero
my_dict = {key: 0 for key in my_dict}

# Reset values to empty
my_dict = {key: "" for key in my_dict}

In this approach, a dictionary comprehension is used to create a new dictionary with the same keys as the original dictionary, but with zero or empty values.

Choose the method that best suits your needs. If you want to modify the existing dictionary in-place, the first method is suitable. If you prefer to create a new dictionary, the second method using a dictionary comprehension is a good option.