Tommy Grav a écrit :
> Hi list,
>
> this is somewhat of a newbie question that has irritated me for a
> while.
> I have a file test.txt:
>
> 0.3434 0.5322 0.3345
> 1.3435 2.3345 5.3433
>
> and this script
> lines = open("test.txt","r").readlines()
> for line in lines:
> (xin,yin,zin) = line.split()
> x = float(xin)
> y = float(yin)
> z = float(zin)
>
> Is there a way to go from line.split() to x,y,z as floats without
> converting
> each variable individually?
either map() or a list comprehension
import sys
fname = "test.txt"
lines = open(fname,"r")
for numline, line in enumerate(lines):
try:
x, y, z = map(float, line.split())
# or:
# x, y, z = [float(item) for item in line.split()]
except (ValueError, IndexError), e:
err = "Invalid data format in %s line %s : "%s" (%s)" \
% (fname, numline, line, e)
print >> sys.stderr, err
sys.exit(1)
else:
# do whatever appropriate here - anyway
HTH
--
http://mail.python.org/mailman/listinfo/python-list
