How to make python printf return this?

Question

I need print(f"" + xx) to output text aaa but it outputs {x} how could i make this work?

I have tried with printf and .format but couln't make any of those to work

x = "aa"
xx = "text {x}"
x = "aaa"
print(f"" + xx)

I can't tell what you're trying to accomplish with that code. — dfundako, Sep 10 '19 at 18:29
The `xx` needs to be inside a `f" ... "` block otherwise it won't be interpolated — Alex W, Sep 10 '19 at 18:33
Possible duplicate of [How do I convert a string into an f-string](https://stackoverflow.com/questions/47339121/how-do-i-convert-a-string-into-an-f-string) — Havenard, Sep 10 '19 at 18:36
what is your python version ? It won't work if it is lesser 3.6. Since formatted string literals were added in python 3.6. https://docs.python.org/3/whatsnew/3.6.html#pep-498-formatted-string-literals — rprakash, Sep 10 '19 at 18:38

score 1 · Answer 1 · answered Sep 10 '19 at 18:29

1

You need to put the variable you are trying to print within f"{}":

x = "aa"
xx = "{x}"
x = "aaa"
print(f"{x}")

Otherwise, xx is literally "{x}" and is not expanded.

answered Sep 10 '19 at 18:29

Anoop R Desai

wjandrea · Accepted Answer · 2019-09-10T18:46:33.497

0

I think you want to use str.format, not an f-string.

xx = "text {x}"
x = "aaa"
print(xx.format(x=x))  # -> text aaa

Or without passing x explicitly:

print(xx.format(**locals()))  # -> text aaa

edited Sep 10 '19 at 18:46

answered Sep 10 '19 at 18:40

wjandrea

2 Answers2