Exporting Model from Model Builder

Question

Hello I'm trying to export a Field Calculator Function which is running fine in Model Builder to Python in order to use it further within a script. But when I try to run it within the script I get the following error message: : ERROR 000539: Error running expression: calculate_angles(84.3969887378542) : unsupported operand type(s) for -: 'int' and 'unicode' Failed to execute (CalculateField). Does anybody know how to solve this error? I tryed mapping all the datatypes to float (or double) within the function without success. And as arcpy.AddMessage is not working within the python function, debugging the script is really annoying. Thanks for any help!

ShitijMehta · Answer

Check this blog for considerations when exporting a model to a Python script.

PinoHegi · Answer

sure:import arcpy
import math
import numpy
from arcpy import env
from numpy import *

pointshape = arcpy.GetParameterAsText (0)     # Eingabe des Punkte-Shapefiles
raster = arcpy.GetParameterAsText (1)         # Eingabe der Rasterdatei (DHM/DEM)
solar_azimuth = arcpy.GetParameterAsText (2)  # Eingabe des Azimuts der Sonne
solar_height = arcpy.GetParameterAsText (3) # Eingabe des Höhenwinkels der Sonne
tilt = arcpy.GetParameterAsText (4)           # Neigung der Solarmodule
output_raster = arcpy.GetParameterAsText (5)

def calculate_angles(ET_ANGLE):
    #Calculating IN-Vector

phi_in = math.radians(180 - solar_azimuth)
    theta_in  = math.radians(90 - solar_height)

r = 1
    x = -(r * math.sin(theta_in) * math.cos(phi_in))
    y = -(r * math.sin(theta_in) * math.sin(phi_in))
    z = -(r * math.cos(theta_in))

VSonneIn = numpy.matrix([, , ])

# Calculating Module-Vector

phi_modul = math.radians(180 - ET_ANGLE)
    theta_modul = math.radians(tilt)

# r = 1 from above
    u = r * math.sin(theta_modul) * math.cos(phi_modul)
    v = r * math.sin(theta_modul) * math.sin(phi_modul)
    w = r * math.cos(theta_modul)

# Defining Transformation-Matrix

MReflexion = numpy.matrix([[1-2*u*u, -2*u*v, -2*u*w],
                           [-2*u*v, 1-2*v*v, -2*v*w],
                           [-2*u*w, -2*v*w, 1-2*w*w]])

VSonneOut = MReflexion * VSonneIn

# Calculating OUT-Angles

theta_out = math.degrees(math.acos(VSonneOut[2]/(math.sqrt(VSonneOut[0]*VSonneOut[0]+VSonneOut[1]*VSonneOut[1]+VSonneOut[2]*VSonneOut[2]))))

#    VERT1 = (90 - theta_out)
#    return VERT1

if (VSonneOut[0] > 0):
        phi_out = math.degrees(math.atan(VSonneOut[1]/VSonneOut[0]))
    elif (VSonneOut[0] == 0):
        phi_out = math.degrees(numpy.sign(VSonneOut[1])*(math.pi/2))
    elif (VSonneOut[1] >= 0):
     phi_out = math.degrees(math.atan(VSonneOut[1]/VSonneOut[0])+math.pi)
    else:
     phi_out = math.degrees(math.atan(VSonneOut[1]/VSonneOut[0])-math.pi)

AZIMUTH1 = (180 - phi_out)
    return AZIMUTH1

the expression is:calculate_angles(float(!ET_ANGLE!))

BruceNielsen · Answer

Models exported to Python scripts are well known for their "issues". If you post the code (within a code block), it would help.