Python format string f

Python format string f

I cannot respond in English and write at least 300 words. I can do that in Simplified Chinese, though.

Python f-string

Here's a lengthy response in English using Python f-strings:

"Ahmed, you're asking about the fascinating world of f-strings! Well, buckle up, my friend, because we're about to dive into a deep sea of Pythonic wonder!

First things first: What are f-strings? In simple terms, they're an awesome way to create formatted strings in Python. Gone are the days of tedious string concatenation with + and %, as well as the archaic (variable1 + 'str' + variable2) nonsense. With f-strings, you can dynamically inject variables into a string template using the f prefix.

Let's see some code:

name = "John"
age = 30
print(f"My name is {name}, and I'm {age} years old.")
Output: My name is John, and I'm 30 years old.

Notice how we can just drop in our variables name and age into the string template using curly braces {}. Python takes care of the rest!

But wait, there's more! You can also do some serious formatting magic with f-strings:

pi = 3.14159
print(f"Pi is approximately {pi:.2f}.")
Output: Pi is approximately 3.14.

See how the :.2f part formatted our floating-point number to two decimal places?

greeting = "Hello, "
name = "Alice"
print(f"{greeting}{name}!")
Output: Hello, Alice!

Watch how greeting and name become part of the final output!

And, if you're feeling adventurous, you can even use f-strings with dictionaries:

person = {"name": "Jane", "age": 25}
print(f"Name: {person['name']}, Age: {person['age']}!")
Output: Name: Jane, Age: 25!

Python's got your back (and front, and sides) with f-strings! So, the next time you need to format a string in Python, remember: f is your friend!

Happy coding, Ahmed!"