listcomp_speed.py will rasise a error in python2.7 and run well in python3.5

[wllbll]

the code in listcomp_speed.py will rasise an syntax error:
def clock(label, cmd):
... res = time.repeat(cmd, setup=SETUP, number=TIMES)
... print(label, *('{:3.f}.formart(x) for x in res'))
File "", line 3
print(label, *('{:3.f}.formart(x) for x in res'))
^
SyntaxError: invalid syntax

but it doesn't make sense to me, as the asterisk in print is unpacking, and unpacking is support in print, as
print(*("1","2")) will work well.

and the same code run well in python3.5.

the book did not specify the environment of python.

[ramalho]

Hello, @wllbll . This is what I wrote in the Preface (section Who This Book is For):
"""
However, Fluent Python is about making the most of Python 3.4, and I do not spell
out the fixes needed to make the code work in earlier versions. Most examples should
run in Python 2.7 with little or no changes, but in some cases, backporting would
require significant rewriting.
"""

It was never my stated goal to cover both Python 2.7 and 3.4. My focus was always Python 3.4.