Alex Kleider wrote:
> On 2015-05-11 23:48, Peter Otten wrote:
>> Alex Kleider wrote:
>>
>>> Is there a better (more 'Pythonic') way to do the following?
>>>
>>> for f_name in f_names:
>>> with open(f_name, 'r') as f:
>>> for line in f:
>>
>> There's the fileinput module
>>
>> <https://docs.python.org/dev/library/fileinput.html#fileinput.input>
>>
>> but personally I prefer the way you show above.
>
> Then I'll stick with what you prefer and what I know.
> It seems silly to import yet another module for the sole
> purpose of saving one line of code
I think of importing a module as "cheap" unless it draws in a framework (e.
g. numpy). And don't forget that even small pieces of code should be tested.
So you aren't just saving the extra line, but also some of your tests.
> although the reason
> for my inquiry was more to diminish levels of indentation
> than number of lines.
You usually do that by factoring out the loops into a generator:
def lines(files):
for file in files:
with open(files) as f:
yield from f # before python 3.3: for line in f: yield line
for line in lines(files):
...
Also possible, but sloppy as files are closed on garbage collection rather
than explicitly:
lines = (line for file in files for line in open(file))
for line in lines:
...
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