python - Adding thousand separator while printing a number

Question

I don't really know the "name" for this problem, so it might be a incorrect title, but the problem is simple, if I have a number

for example:

number = 23543
second = 68471243

I want to it make print() like this.

23,543
68,471,243

I hope this explains enough or else add comments. Any help is appreciated!

Answer 1

If you only need to add comma as thousand separator and are using Python version 3.6 or greater:

print(f"{number:,g}")

This uses the formatted string literals style. The item in braces {0} is the object to be formatted as a string. The colon : states that output should be modified. The comma , states that a comma should be used as thousands separator and g is for general number. [1]

With older Python 3 versions, without the f-strings:

print("{0:,g}".format(number))

This uses the format-method of the str-objects [2]. The item in braces {0} is a place holder in string, the colon : says that stuff should be modified. The comma , states that a comma should be used as thousands separator and g is for general number [3]. The format-method of the string object is then called and the variable number is passed as an argument.

The 68,471,24,3 seems a bit odd to me. Is it just a typo?

Formatted string literals

Python 3 str.format()

Python 3 Format String Syntax

Answer 2

The easiest way is setting the locale to en_US.

Example:

import locale
locale.setlocale(locale.LC_ALL, 'en_US')
number = 23543
second = 68471243
print locale.format("%d", number, grouping=True)
print locale.format("%d", second, grouping=True)

prints:

23,543
68,471,243