On 07/09/2013 09:30 AM, alex.ha...@gmail.com wrote:
Hello!
I'm new here and fairly new to Python. I am attempting to read a data file into
python and adding it to a 2D list to make it easy to use further down the line.
My data file is just 7 numbers in a row seperated by commas and each bulk of
data is seperated by the sign @ to indicate that the data from this point on
should be stored into a new part of the 2D list.
1,1,1,1,1,1,1
2,2,2,2,2,2,2
@
3,3,3,3,3,3,3
4,4,4,4,4,4,4
Perhaps you mean:
data = """\
1,1,1,1,1,1,1
2,2,2,2,2,2,2
@
3,3,3,3,3,3,3
4,4,4,4,4,4,4
"""
After reading the file, the way I imagine the data to be shown would be in this
manner:
data[0][0] = (1,1,1,1,1,1,1)
data[0][1] = (2,2,2,2,2,2,2)
data[1][0] = (3,3,3,3,3,3,3)
data[1][1] = (4,4,4,4,4,4,4)
perhaps you mean:
object_data[0][0] == (1,1,1,1,1,1)
etc.
This way it will be easy to loop across the data when I use it in Blender.
My code looks like this;
------------------------------
object_data = []
object_data.append([])
You omitted i = 0
for rows in data.splitlines():
So exactly what is data? It's not what you say above. Did you get it
by doing something like myfile.read() ?
elems = rows.split(',')
if elems[0] != "@":
object_data[i].append((float(elems[0]),float(elems[1]),
float(elems[2]),float(elems[3]),float(elems[4]),
float(elems[5]),int(elems[6])))
else:
**start on object_data[1][j] and loop over it all again**
-------------------------------
I could really use some help as to how I would force my code to not start on
object_data[0] on the next iteration in the for loop, but rather on
object_data[1]. I'm an avid Matlab user so I imagined this to be done simply by
setting i=i+1 in the else part, however this does not work as it complains
about the list being out of bounds.
Any help is really appreciated!
Replace te **start line with something like:
object_data.append([])
i += 1
This assumes a few missing lines, which must have been there or you
would have already had runtime errors. For example, you'll need i=0
before the loop.
Another comment about the append with all those calls to float(). When
you see a line like that, you want to seriously consider making it a
loop, or a comprehension, or something.
Given that elem is a list of strings, you could convert it to a list of
float, then convert that to a tuple (if you really wanted that). At
that point, you just append it. All this could be done in one line if
you like, something like (untested):
object_data[i].append(tuple(map(float, row.split(","))))
--
DaveA
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