Re: A question about readability
- Original Message -
On Dec 7, 6:46 pm, Marco name.surn...@gmail.com wrote:
Hi all, do you think this code:
$ more myscript.py
for line in open('data.txt'):
result = sum(int(data) for data in line.split(';'))
print(result)
that sums the elements of the lines of this file:
$ more data.txt
30;44;99;88
11;17;16;50
33;91;77;15
$ python3.3 myscript.py
261
94
216
is explicit enough? Do you prefer a clearer solution?
Thanks in advance, Marco
--
Marco
Interpreting your question as a general question of stylistics, my
experience is that a 3 line script often becomes a 10 line or a 50
line script at which point the direct printing will have to be
modified to create an internal data structure.
So on the whole I find it expedient to start with that assumption and
write it as:
def linesums(file):
return [sum(int(i) for i in l.split(';')) for l in open(file, 'r')]
Why change the OP's namings ? 'data' and 'line' were more suitable than 'i' and
'l'. Of course we're nitpicking, no one will get hurt.
JM
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Re: A question about readability
On Dec 10, 3:03 pm, Jean-Michel Pichavant jeanmic...@sequans.com
wrote:
- Original Message -
On Dec 7, 6:46 pm, Marco name.surn...@gmail.com wrote:
Hi all, do you think this code:
$ more myscript.py
for line in open('data.txt'):
result = sum(int(data) for data in line.split(';'))
print(result)
that sums the elements of the lines of this file:
$ more data.txt
30;44;99;88
11;17;16;50
33;91;77;15
$ python3.3 myscript.py
261
94
216
is explicit enough? Do you prefer a clearer solution?
Thanks in advance, Marco
--
Marco
Interpreting your question as a general question of stylistics, my
experience is that a 3 line script often becomes a 10 line or a 50
line script at which point the direct printing will have to be
modified to create an internal data structure.
So on the whole I find it expedient to start with that assumption and
write it as:
def linesums(file):
return [sum(int(i) for i in l.split(';')) for l in open(file, 'r')]
Why change the OP's namings ? 'data' and 'line' were more suitable than 'i'
and 'l'. Of course we're nitpicking, no one will get hurt.
JM
Yes, l is an undesirable name because it can look like 1
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Re: A question about readability
In article k9srup$kc7$1...@speranza.aioe.org,
Marco name.surn...@gmail.com wrote:
Hi all, do you think this code:
$ more myscript.py
for line in open('data.txt'):
result = sum(int(data) for data in line.split(';'))
print(result)
That sum() line is a bit of a mouthful. I would refactor it into
something like this:
for line in open('data.txt'):
fields = line.split(';')
print sum(int(i) for i in fields)
It's the same number of lines, but I think it's easier to read.
BTW, are you using Python 2 or 3? It helps when asking these kinds of
questions to let people know. I assumed 2 in my answer above.
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Re: A question about readability
On Fri, 07 Dec 2012 14:46:03 +0100, Marco wrote:
Hi all, do you think this code:
$ more myscript.py
for line in open('data.txt'):
result = sum(int(data) for data in line.split(';'))
print(result)
[...]
is explicit enough? Do you prefer a clearer solution? Thanks in advance,
It's perfectly fine for such a simple script. It is readable and explicit.
--
Steven
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Re: A question about readability
On Dec 7, 6:46 pm, Marco name.surn...@gmail.com wrote:
Hi all, do you think this code:
$ more myscript.py
for line in open('data.txt'):
result = sum(int(data) for data in line.split(';'))
print(result)
that sums the elements of the lines of this file:
$ more data.txt
30;44;99;88
11;17;16;50
33;91;77;15
$ python3.3 myscript.py
261
94
216
is explicit enough? Do you prefer a clearer solution?
Thanks in advance, Marco
--
Marco
Interpreting your question as a general question of stylistics, my
experience is that a 3 line script often becomes a 10 line or a 50
line script at which point the direct printing will have to be
modified to create an internal data structure.
So on the whole I find it expedient to start with that assumption and
write it as:
def linesums(file):
return [sum(int(i) for i in l.split(';')) for l in open(file, 'r')]
Whether this one-liner is readable or not and how to make it more so
etc is probably bikeshedding.
More important questions are for example:
- Should you protect the open with a try
- When to list and when to generate(or)
All these are nice features of python but can lead to over-engineered
code
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