Thank you all for your suggestions.
The purpose of this script to read values for initialization of a class
that calls functions from another software program for chemically reacting
flows (www.cantera.org). I have around 25 input variables with distinct
variable names (dont follow any patterns) with 5 strings (i.e., last five
variables that contain chemical species names). Currently, I use a csv file to
provide the initial values. I hope this answers your questions.
Lex
Michael Langford [EMAIL PROTECTED] wrote: I'd like to be clear, this isn't a
clean thing for the middle of a big
program. I was thinking the entire time I was testing it I wonder why
anyone would need to do this
But if you have a python program you'd probably call a script, used
for one simple task, it can be appropriate (with Kent's catch on the
globals/local thing). I assumed you were using your approach for
something like that. (would you tell us what you're doing this for
btw? The suspense ... :o))
If you're doing something like multivariable analysis or something
else that you would do in software like maple, this approach can
greatly simplify the notation over the list/dict approach.
If you're not using python as a huge substitute for a math solver,
then avoid what I said like the plague and use a dict.
--Michael
On 1/15/08, Michael Langford wrote:
Accidentally cut off a 0 there...
Think about using ConfigParser instead of your csv. Doug Hellman wrote
a good article on that:
http://blog.doughellmann.com/2007/04/pymotw-configparser.html
But if you really want to load your data this way, this will work:
for subscript,line in enumerate(file(file.csv)):
s = line.split(,)[1]
try:
f = float(s)
locals()[x%i % subscript]=f
except:
locals()[x%i % subscript]=s
print x1
print x0
On Jan 15, 2008 3:47 PM, Michael Langford wrote:
for subscript,line in enumerate(file(file.csv)):
s = line.split(,)[1]
try:
f = float(s)
locals()[x%i % subscript]=f
except:
locals()[x%i % subscript]=s
print x1
print x
On Jan 15, 2008 3:26 PM, lechtlr wrote:
I want to read an input file (file.csv) that has two columns. I want to
read
2nd column and assign variables that are strings and floats. Currently, I
use the following split() function to read from the input file and create
a
list, and then assign each element to a variable.
I am wondering there is any other easier (and elegant) way of doing this ?
data = []
for line in open(file.csv):
columns = line.split(',')
data.append([columns[1]])
This script returns, say:
data = [ ['20.0'], ['0.34'], ,[ 'a:0.20, b:0.30, c:0.50'
]]
Then, I assign to a set of variables, say:
x1 = float(data[0][0]) ; x2 = float(data[1][0]);.;xn =
data[-1][0]
Thanks,
Lex
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Michael Langford
Phone: 404-386-0495
Consulting: http://www.RowdyLabs.com
--
Michael Langford
Phone: 404-386-0495
Consulting: http://www.RowdyLabs.com
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