Maybe you have meant to a formatted string:

my_var3 = "prefix_%s" % suffix

Or

 my_var3 = "prefix_{}".format(suffix)

where suffix has some runtime string result.

On Thursday, February 27, 2020, Gianluca Cecchi <gianluca.cecchi@gmail.com> wrote:
Hello,
suppose in a .py using sdk I have

my_var1 = 'prefix'

then in the workflow I get at runtime another my_var2 that for example has the attribute
my_var2.name that equals "suffix"

Then I want to define a new variable my_var3 with value "prefix_suffix", where the string "suffix" is known only at runtime, how can I get it?

my_var3 =  ???

Can I use something similar to what I do when using the print function?

print ("My storage domain is %s..." % sd.name)
?
Thanks,
Gianluca