On 20/11/2013 00:30, Victor Hooi wrote:
Hi,
Is either approach (try-excepts, or using libmagic) considered more idiomatic?
What would you guys prefer yourselves?
Also, is it possible to use either approach with a context manager ("with"),
without duplicating lots of code?
For example:
try:
with gzip.open('blah.txt', 'rb') as f:
for line in f:
print(line)
except IOError as e:
with open('blah.txt', 'rb') as f:
for line in f:
print(line)
I'm not sure of how to do this without needing to duplicating the processing
lines (everything inside the with)?
And using:
try:
f = gzip.open('blah.txt', 'rb')
except IOError as e:
f = open('blah.txt', 'rb')
finally:
for line in f:
print(line)
won't work, since the exception won't get thrown until you actually try to open
the file. Plus, I'm under the impression that I should be using
context-managers where I can.
Also, on another note, python-magic will return a string as a result, e.g.:
gzip compressed data, was "blah.txt", from Unix, last modified: Wed Nov 20
10:48:35 2013
I suppose it's enough to just do a?
if "gzip compressed data" in results:
or is there a better way?
Cheers,
Victor
On Tuesday, 19 November 2013 20:36:47 UTC+11, Mark Lawrence wrote:
On 19/11/2013 07:13, Victor Hooi wrote:
So basically, using exception handling for flow-control.
However, is that considered bad practice, or un-Pythonic?
If it works for you use it, practicality beats purity :)
--
Python is the second best programming language in the world.
But the best has yet to be invented. Christian Tismer
Mark Lawrence
Something like
for filetype in filetypes:
try:
process(filetype)
break
except IOError:
pass
??? as it's 01:50 GMT and I can't sleep :(
--
Python is the second best programming language in the world.
But the best has yet to be invented. Christian Tismer
Mark Lawrence
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