How can the input string be used to format the dictionary in Python?

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The input string can be used to format the dictionary in Python by using string formatting methods such as format() or f-string. The input string can contain placeholder values that correspond to the keys in the dictionary. These placeholders can be replaced with the values of the corresponding keys using the string formatting method. Here's an example:

# Input string
input_str = "My name is {name} and I am {age} years old."

# Dictionary
my_dict = {"name": "John", "age": 25}

# Format the string using the dictionary
output_str = input_str.format(**my_dict) # or, output_str = f"My name is {my_dict['name']} and I am {my_dict['age']} years old."

# Output
print(output_str) # "My name is John and I am 25 years old."

In this example, the placeholders {name} and {age} in the input string are replaced with the values of the corresponding keys in the dictionary my_dict using the format() method.