Parsing fails when using implicit string concatenation

[tedmiston]

This concatenation style is valid and commonly use for multiline strings.

x = (
    "foo"
    "bar"
)
print x

output:

foobar

However it breaks when a variable interpolation is added:

# coding: interpy

a = 5
x = (
    "foo #{a}"
    "bar"
)
print x

output:

  File "test.py", line 6
    "bar"
        ^
SyntaxError: invalid syntax

I expected the output:

foo5bar

[prashnts]

Since the bytecode generation converts the interpolation to addition, this would certainly seem to fail.

The code above is converted to:

x = (
    "foo " + str(a)
    "bar"
)

This sounds like a very common pitfall.

[tedmiston]

@prashnts I would agree. I stopped using the library for that reason.