On 16Jun2018 12:01, Sharan Basappa <sharan.basa...@gmail.com> wrote:
Is there a difference between these prints. The first one looks a bit complex.
So, why should it be used?
my_age = 35 # not a lie
print "my age %s." % my_age
print "my age ", my_age
Output:
%run "D:/Projects/Initiatives/machine learning/programs/five.py"
my age 35.
my age 35
In case nobody else notices, the reason the second one has 2 spaces before "35"
is that print puts a space between items. So you have a space from the "my age
" and also a space from the item separation. The first print statement is only
printing one item.
Regarding which style to use: the latter is better because it is more readable.
The former can be better when constructing a string with several values where
you want more control and better readablility _for the message as a whole_.
Consider:
# variables, just to make the examples work
# in a real programme perhaps these came from
# some more complex earlier stuff
name = "Sharon"
age = 35
print "The person named %r is %d years old." % (name, age)
versus:
name = "Sharon"
age = 35
print "The person named", repr(name), "is", age, "years old."
I'd be inclined to prefer the former one because I can see the shape of the
message.
Also, I notice you're using Python 2 (from the print syntax). In Python 3 we
have "format strings", which let you write:
name = "Sharon"
age = 35
print(f"The person named {name|r} is {age} years old.")
Win win!
Cheers,
Cameron Simpson <c...@cskk.id.au>
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