Python lambda expression for formatting integers

If you're looking for a concise way to format a list of integers in Python, lambda expressions can be helpful. The following lambda expression can be used to format a list of integers with a provided separator:

separator = ", "
formatter = lambda x: separator.join(map(str, x))

Here, the map function converts each integer to a string, and join concatenates the strings with the separator. You can adjust the separator to fit your needs.

For example, if you have a list of integers [1, 2, 3], you can use the lambda expression to format the list as a string:

>>> numbers = [1, 2, 3]
>>> formatted_numbers = formatter(numbers)
>>> formatted_numbers
'1, 2, 3'

You can also use the lambda expression inline, for example in a print statement:

>>> print("The numbers are: {}".format(formatter(numbers)))
The numbers are: 1, 2, 3

With this lambda expression, you can easily format lists of integers in a concise and flexible way.