2019-01-14-fstrings-yet-another-string-formatter-in-python.md

layout	title	date	tag
post	Fstring, yet another string formatter in Python	2019-01-14 20:52:03 +0530	fstring Python Python3.6 FormattedStrings

Fstring is a cool feature introduced as a part of Python 3.6. Fstring can be elaborated as "Formatted String". At the time of writing this post, Python already has more than two ways to a format string. Still, Fstring is released by giving yet another way to format a string. Fstrings can be easy to understand and simple to read. When you prefix the string with f, it becomes a formatted string. All names wrapped inside the curly braces ({}) are resolved with the value of variable available in local scope. If the variable isn’t found in the local scope then it will raise a NameError exception.

TODO: ADD below things

1. Multiline Fstring
2. FString by calling function or class methods
3. Fstring as dictionary key
4. Fstring by using capital 'F'.

Demonstration

Below is the code used in the example

name = "Jay"
print(f"Hello {name}")

In my view, this option of string formation is more concise and readable than all other options. I advise migrating your code to Fstrings if your Python interpreter is greater than or equal to version 3.6. You should note that existing string formation approaches are still supported and are not subject to depreciate in the near future.

Summary

• Fstring can be elaborated as "Formatted String".

• Variable is always resolved at a local scope. If it isn’t found then it will raise the NameError exception.

• You can format your strings by Fstring approach only if your Python interpreter version is greater than or equal to 3.6.

• Existing string formation approaches are not subjected to deprecate soon.