Declare a variable global

[yinglcs at gmail.com]

On Feb 19, 11:09 am, Jean-Paul Calderone <exar... at divmod.com> wrote:
> On 19 Feb 2007 09:04:19 -0800, "ying... at gmail.com" <ying... at gmail.com> wrote:
>
> >Hi,
>
> >I have the following code:
>
> >colorIndex = 0;
>
> >def test():
> >     print colorIndex;
>
> >This won't work.
>
> Are you sure?
>
>     exarkun at charm:~$ cat foo.py
>     colorIndex = 0
>
>     def test():
>         print colorIndex
>
>     test()
>     exarkun at charm:~$ python foo.py
>     0
>     exarkun at charm:~$
>
> The global keyword lets you rebind a variable from the module scope.  It
> doesn't have much to do with accessing the current value of a variable.
>
> Jean-Paul

Thanks. Then I don't understand why I get this error in line 98:

 Traceback (most recent call last):
  File "./gensvg.py", line 109, in ?
    outdata, minX, minY, maxX, maxY = getText(data);
  File "./gensvg.py", line 98, in getText
    print colorIndex;
UnboundLocalError: local variable 'colorIndex' referenced before
assignment


Here is my complete script:
#!/usr/bin/python

import re
import sys
import time
import os
import shutil

colors = ["#FF0000",  "#00FF00", "#0000FF",
"#FFFF00" ,"#FFA500" ,"#DA70D6"]
colorIndex = 0

def getText( intputstr):
    rc = ""

    maxX = 0;
    maxY = 0;
    minX = 10000000;
    minY = 10000000;


    for str in intputstr:

        print str;

        if str != "":
            pattern = "x:(\d+) y:(\d+) w:(\d+) h:(\d+) (.*)"

            match = re.findall(pattern, str)

            if match:
                x, y, width, height, area = match[0]

                colorIndex = colorIndex + 1

                rc = rc + "<rect x=\"%(x)s\" y=\"%(y)s\" width=\"%
(width)s\" height=\"%(height)s\" " % locals()

                rc = rc + "fill=\"%s\" stroke=\"#000000\" stroke-width=
\"1px\" fill-opacity=\".5\" />\n"  % colors[colorIndex  % len(colors)]

                _x = int(x)
                _y = int(y)
                _width = int(width)
                _height = int(height)

                minX = min(minX, _x);
                minY = min(minY, _y);

                maxX = max(maxX, _x+ _width);
                maxY = max(maxY, _y+_height);



            else:
                pattern = "\((\d+),(\d+)\)\((\d+),(\d+)\)(.*)"

                match = re.findall(pattern, str)

                if match:
                    x1, y1, x2, y2, ignore = match[0]

                    rc = rc + "<line x1=\"%(x1)s\" y1=\"%(y1)s\" x2=\"%
(x2)s\" y2=\"%(y2)s\" style=\"stroke:rgb(99,99,99);stroke-width:2\" /
>" % locals()
                    rc = rc + "\n"

                    _x1 = int(x1)
                    _y1 = int(y1)
                    _x2 = int(x2)
                    _y2 = int(y2)

                    minX = min(_x1, _x2);
                    minY = min(_y1, _y2);

                    maxX = max(_x1, _x2);
                    maxY = max(_y1, _y2);

                    print colorIndex;

                    print  "match 2!"


    return rc, minX, minY, maxX, maxY;

fileName = sys.argv[1]

inputFile = open(fileName, 'r')
data = inputFile.readlines();
outdata, minX, minY, maxX, maxY = getText(data);

print  minX, minY, maxX, maxY

outputFile = open(fileName + '.svg', 'w')

print >> outputFile, "<svg xmlns=\"http://www.w3.org/2000/svg\"
xmlns:xlink=\"http://www.w3.org/1999/xlink\" id=\"body\">"

outputFile.write(outdata);

print >>outputFile, "</svg>"