Hi all,
I'm new to python and I'm trying to build up a script...
My question is:
After I setted up an option of type double, How can I get it in a python
variable?
h = float(os.getenv('GIS_OPT_h')) it doesn't work, it require a string
or numeric attribute !?!?
how to do?
thanks,
Maxi
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Here is my script:
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#!/usr/bin/python
# -*- coding:utf-8 -*-
import math
#%Module
#% description: g.parser test script
#% keywords: keyword1, keyword2
#%End
#%option
#% key: h
#% type: double
#% description: Profondità del mare in prossimità della costa h
#% required : yes
#%end
#%option
#% key: ho
#% type: double
#% description: Profondità del mare in corrispondenza dell'epicentro
#% required : yes
#%end
#%option
#% key: Ho
#% type: double
#% description: Altezza d'onda nel punto di generazione dello tsunami
#% required : yes
#%end
import sys
import os
def main():
#### add your code here ####
print ""
print "Value of GIS_OPT_h: %s" % os.getenv("GIS_OPT_h")
print "Value of GIS_OPT_ho: %s" % os.getenv("GIS_OPT_ho")
print "Value of GIS_OPT_Ho: %s" % os.getenv("GIS_OPT_Ho")
#### it works and print the user input ####
h = float(os.getenv('GIS_OPT_h'))
ho = os.getenv('GIS_OPT_ho')
Ho = os.getenv('GIS_OPT_Ho')
#### NOT WORKING ! i guess i need something similar to atof in C ANSI ####
Co=math.sqrt(9.8 * h)
print "celerità dell'onda=",Co
H= Ho * ((ho/h)**(0.25))
print "Altezza d'onda a riva=",H
U=Co * math.sqrt((1+H/h))
print "Velocità d'onda a riva=",U
L= 4 * 2.415 *h /(math.sqrt(3*H/h))
print "Lunghezza di un'onda solitaria=",L
k1=U**2 * L/(19.6)
print "k1=",k1
k2= U**2 * H/(39.2)
print "k2=",k2
#### end of your code ####
if __name__ == "__main__":
if ( len(sys.argv) <= 1 or sys.argv[1] != "@ARGS_PARSED@" ):
os.execvp("g.parser", [sys.argv[0]] + sys.argv)
else:
main();
--
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Dr. Massimiliano Cannata
Environmental & Geomatic Engineer
Institute of Earth Scences - SUPSI
Trevano, C.P. 72, CH-6952 Canobbio, SWITZERLAND
Tel: +41 (0)58 / 666 62 14
Fax: +41 (0)58 / 666 62 09
E-mail: massimiliano.cannata@supsi.ch
Web:
http://www.ist.supsi.ch
http://istgis.ist.supsi.ch:8001/geomatica/
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