On 29/04/2015 15:40, Cecil Westerhof wrote:
Op Wednesday 29 Apr 2015 15:14 CEST schreef Dave Angel:
On 04/29/2015 08:42 AM, Cecil Westerhof wrote:
I have the folowing print statements:
print(
'Calculating fibonacci_old, fibonacci_memoize and'
'fibonacci_memoize once for {0} '.format(large_fibonacci))
print(
'Calculating fibonacci_old, fibonacci_memoize and'
'fibonacci_memoize once for {0} '.format(large_fibonacci) +
'to determine speed increase')
print(
'Calculating fibonacci_old, fibonacci_memoize and'
'to determine speed increase'
'fibonacci_memoize once for {0} '.format(large_fibonacci))
print(
'Calculating fibonacci_old, fibonacci_memoize and'
'fibonacci_memoize once for {0} '.format(large_fibonacci)
'to determine speed increase')
The first three work, but the last gives:
'to determine speed increase')
^
SyntaxError: invalid syntax
Not very important, because I can use the second one, but I was
just wondering why it goes wrong.
Adjacent string literals are concatenated. But once you've called a
method (.format()) on that literal, you now have an expression, not
a string literal.
You could either change the last line to
+ 'to determine speed increase')
or you could concatenate all the strings before calling the format
method:
print(
'Calculating fibonacci_old, fibonacci_memoize and'
'fibonacci_memoize once for {0}'
'to determine speed increase' .format(large_fibonacci))
I now use this, I did not know that the addjacent-concatenation
occurred at compile time.
I spend a ‘little‘ time, but it was worth it.
From the amount of messages you could think I am a spammer. ;-)
Did you mean spanner? ;-)
--
My fellow Pythonistas, ask not what our language can do for you, ask
what you can do for our language.
Mark Lawrence
--
https://mail.python.org/mailman/listinfo/python-list
