> From: "Alan Gauld"
> To: tu...@python.org
> Date: Mon, 22 Jun 2009 14:15:55 +0100
> Subject: Re: [Tutor] how to manage an encrypted file?
>>
>> there must be a Security Now episode that explains the thing pretty
>> well (could be this one http://www.grc.com/sn/sn-011.htm).
>
> Eek! I tried to re
2009/6/23 Alan Gauld :
> Interesting! How is a NaN stored in Python?
> ie. How do you get to the point of having one in the first place?
Well, you can do this:
>>> float('nan')
nan
(try float('inf') too)
--
John.
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"Kent Johnson" wrote
I have a list with some values being NaN (after division-by-zero). How
can I
check and remove all the NaN values?
In Python 2.6 you can use math.isnan() to check for NaN, so you can
filter your list by
newList = [ x for x in oldList if not math.isnan(x) ]
Interesting!
"Eduardo Vieira" wrote in message
news:9356b9f30906221404o7a7c5e5dt3d59e7b6d40ac...@mail.gmail.com...
Hello, I have a dictionary similar to this:
dyc = {
'a50' : ['textfield', 50, 40],
'k77' : ['othertext', 60, 10]
}
I was trying to write a csv with the csv module, by doing this:
import csv
m
are there any extra spaces of characters
" intrinsic" !== "intrinsic"
On Monday 22 June 2009 8:14:00 pm Bryan Fodness wrote:
> tried both again, they both return the same 9 lines, when i expect
> 492. it dies on a blank line, but the if i_line takes care of the
> previous ones.
>
> On Mon, Jun 2
tried both again, they both return the same 9 lines, when i expect
492. it dies on a blank line, but the if i_line takes care of the
previous ones.
On Mon, Jun 22, 2009 at 4:21 PM, vince spicer wrote:
> 14mb file shouldn't be an issue, unless you very little ram, is there any
> errors being outpu
On Mon, Jun 22, 2009 at 7:25 PM, Wayne wrote:
> With string formatting I know you can easily specify precision a la
> 'file%.2d.jpg' % 1 which would give me 'file01.jpg' but then I discovered
> you can indeed chain together formatting (or use variables in place of
> string constants... of course s
On Mon, Jun 22, 2009 at 4:15 PM, Elisha Rosensweig wrote:
> Hi,
>
> I have a list with some values being NaN (after division-by-zero). How can I
> check and remove all the NaN values?
In Python 2.6 you can use math.isnan() to check for NaN, so you can
filter your list by
newList = [ x for x in old
Well, I was going to ask the question, but some experimentation has led me
to the answer which I will share. Mainly because I'm sure someone out there
may come across the need.
I'm writing a function that will generate me a filename such as
"file0001.jpg"
but I want to be able to specify the min
"Bryan Fodness" wrote
I am trying to output all the lines that start with a specific word.
It is a large output file (~14 Mb), but nothing that I thought would
be a problem.
Shouldn't be, you are processing one line at a time!
for line in open('output.new'):
i_line = line.split()
if
"Elisha Rosensweig" wrote
I have a list with some values being NaN (after division-by-zero). How
can I
check and remove all the NaN values?
NaN is, so far as I know, a JavaScript only feature. The equivalent thing
in Python would be to avoid having those 'values' in your list in the first
p
Hello, I have a dictionary similar to this:
dyc = {
'a50' : ['textfield', 50, 40],
'k77' : ['othertext', 60, 10]
}
I was trying to write a csv with the csv module, by doing this:
import csv
myfile = open('c:/myscripts/csv-test.csv', 'wb')
mywriter = csv.writer(myfile, dialect='excel')
for item in
14mb file shouldn't be an issue, unless you very little ram, is there any
errors being outputted?
a cleaner way for reading the file:
for line in open("output.new"):
if line.startswith("intrinsic"):
print line
On Mon, Jun 22, 2009 at 2:16 PM, Bryan Fodness wrote:
> I am trying to o
I am trying to output all the lines that start with a specific word.
It is a large output file (~14 Mb), but nothing that I thought would
be a problem.
for line in open('output.new'):
i_line = line.split()
if i_line:
if i_line[0] == "intrinsic":
print i_line
It does no
Hi,
I have a list with some values being NaN (after division-by-zero). How can I
check and remove all the NaN values?
Thanks
Elisha
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The method that Daniele describes is called encryption with a "One
Time Pad". A somewhat readable description is in Wikipedia:
http://en.wikipedia.org/wiki/One_time_pad
This encryption method is a theoretically perfectly secure, but there
are big organizational problems connected to its use. It
Very good suggestion! Thanks! I knew about TrueCrypt before (it's
really excellent) but I didn't think of it for this purpose because it
didn't show up when I did a Synaptic search. I'll see if I can get it
installed on ubuntu and used with Python. Actually, the URL you give
doesn't work (at least
there must be a Security Now episode that explains the thing pretty
well (could be this one http://www.grc.com/sn/sn-011.htm).
Eek! I tried to read that but it was so garbled and basically illiterate
that I gave up! It's the nearest thing I've seen to plain text encryption!
Sample:
""" We don't,
> From: Wayne
> If you want the most basic encryption you could simply XOR the file. It's
> fairly easy to break, though, because the same character patterns will be
> present as with your original file.
Actually if you do it properly this kind of encryption is unbreakable,
but you'd have to:
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