Python Forum

Hi

I'm just wondering why I cannot print the following:

#!/usr/bin/python3
some_integer = 10
some_string = "Hello World"
print("{some_integer!r} {some_string!r} ".format(some_integer, some_string))

But the following works:

#!/usr/bin/python3
some_integer = 10
some_string = "Hello World"
print("{0!r} {1!r} ".format(some_integer, some_string))

in the first snippet you try to use f-string, introduced in 3.6. print(f"{some_integer!r} {some_string!r}")
note the f in front of the string

also note that in your example you don't actually need the !r part

---

even before 3.6 you can do

items = {'foo':'some string', 'bar':'another_string'}
print('{foo} {bar}'.format(** items))

EDIT: fix the leftover from .format() in the f-string example

To fix first script with format() alone.

some_integer = 10
some_string = "Hello World"
print("{some_integer!r} {some_string!r} ".format(some_integer=some_integer, some_string=some_string))

Output:
10 'Hello World' 

As mention f-string,the look and readability is a better.

some_integer = 10
some_string = "Hello World"
print(f"{some_integer!r} {some_string!r}")

Output:
10 'Hello World'