Re: [Tutor] Question about exception handling

[Adam Bark]

On 17/12/06, Asrarahmed Kadri <[EMAIL PROTECTED]> wrote:



Hi Folks,

Is it possible to catch exception raised in module A to be caught in
module B.

If yes, then please let me know how to do it.



You can easily test this yourself. First right a quick module, something
like this will do:

def exception_test():
   raise Exception

then start an interpreter and do the following


import your_module
try:

... your_module.exception_test()
... except:
... print "Caught it!"
...

HTH,
Adam
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[Tutor] Question about exception handling

[Asrarahmed Kadri]

Hi Folks,

Is it possible to catch exception raised in module A to be caught in module
B.

If yes, then please let me know how to do it.

TIA.

Regards,
Asrarahmed Kadri



--
To HIM you shall return.
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Re: [Tutor] Splitting a file

[Kent Johnson]

Antonio Rodriguez wrote:
> I'm attempting to split a binary file into 5 component files, as a
> "challenge". I thought that the following would work:
> 
> f = open('/home/taser/Desktop/inputfile.bin')
> f1 = []
> f2 = []
> f3 = []
> f4 = []
> f5 = []
> while 1:
> try:
> bytes = list(f.read(5))
> f1.append(bytes[0])
> f2.append(bytes[1])
> f3.append(bytes[2])
> f4.append(bytes[3])
> f5.append(bytes[4])
> except:
> break
> ff1 = open('/home/taser/Desktop/ff1.file','w')
> ff1.write(''.join(f1))
> ff1.close()
> 
> I've only dealt with one of the lists, since I want to test it before
> doing the rest.
> 
> I'm unsure if I'm going about this correctly, since I'm manipulating
> binary data as if it were a text file.

You should read and write the file in binary mode or you will corrupt 
the data:
f = open('/home/taser/Desktop/inputfile.bin', 'rb')
ff1 = open('/home/taser/Desktop/ff1.file','wb')

Kent

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[Tutor] Splitting a file

[Antonio Rodriguez]

I'm attempting to split a binary file into 5 component files, as a
"challenge". I thought that the following would work:

f = open('/home/taser/Desktop/inputfile.bin')
f1 = []
f2 = []
f3 = []
f4 = []
f5 = []
while 1:
try:
bytes = list(f.read(5))
f1.append(bytes[0])
f2.append(bytes[1])
f3.append(bytes[2])
f4.append(bytes[3])
f5.append(bytes[4])
except:
break
ff1 = open('/home/taser/Desktop/ff1.file','w')
ff1.write(''.join(f1))
ff1.close()

I've only dealt with one of the lists, since I want to test it before
doing the rest.

I'm unsure if I'm going about this correctly, since I'm manipulating
binary data as if it were a text file.

Also, I'm told that I should be able to have Python itself determine the
type of file it is, since the file contains a "magic number". However, I
haven't had any luck in my searches for how to do that in Python.

Any help would be appreciated.



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