There were two methods of formatting thongs in python. This situation lasted until the emergence of Python 3.6, with the arrival of the f-strings. Today I will try to discuss all formatting methods, and give an example of their use.

The code we will work with

We will use a few simple variables that I will try to display with each of the available formatting methods.

first_name = "John"
last_name = "Doe"
born_year = 1978
current_age = 40
dict = {'text':'One', 'value': 1}

Old formatting by ‘%’ character

This formatting has been in Python for a long time. Today this method is not recommended by Python’s documentation as it has some shortcomings and may cause display problems an episode and a letter. Below is an example of using this formatting:

print("Hello %s %s. Your born year is %d. You are %d years old", first_name, last_name, born_year, current_age)

What does %s mean? It just informs the interpreter that we want to read the thong. Modifiers available:

• %s - Character string (or any object that has a method repr such as an array))
• **%d ** - Total figures
• %f - floating point numbers
• %.(X) - X-decimal number
• %X - integer represented by the hexadecimal notation

Formatting via p.format()

This option was introduced in Python 2.6. It is an improved formatting compared to %-formatting. With str.format(), the fields we intend to replace are represented by the `{}} characters. Example:

print("Hello {2} {3}. Your born year is {1}. You are {0} years old.".format(current_age, born_year, first_name, last_name))

We can also display the contents of dictionaries by unpacking them:

print("{text} is {value}.".format(**dict))

New road, or f-Strings in Python 3.6

The introduction of f-Strings has made formatting even simpler. Example:

print(f"Hello {first_name} {last_name}. Your born year is {born_year}. You are {current_year} years old")

That’s all, f-Strings are done at start-up. You just give the ``{}` variable you define earlier. You can also use phrases, e.g. “A”:

print(f"{2 * 6}")

This code will display the value of the expression 2 * 6, or 12. You can also call functions:

name = "jane"
print(f"{name.capitalize()}")

The above code will display the text: Jane. We can also display the contents of dictionaries:

print(f"{dict['text']} is {dict['value']}.")

As you can see, it is worth using f-Strings as they increase our productivity and do not obscure the code. They are also slightly faster in execution than %-Strings and str.format().