[Tutor] 2.5 to 2.4 problem with Int

[John]

In all it's glory: I'm just a bit embarrassed because I'm sure it's poor
coding:



def gridarea(H):
 """ returns an array of area corresponding to each nx,ny,nz
 %===========================================
 %
 %-------------------------------------------
 % input
 %   - H  : Header dict object with nx, ny, nz
 %
 % output
 %   - Numpy array area corresponding to nx,ny,nz
 %-------------------------------------------
 %
 %-------------------------------------------
 % last changes: ww, 2007
 %===========================================
 """
 import math
 import numpy as N

 pih=math.pi/180.
 r_earth=6.371e6
 cosfunc = lambda y : math.cos(y*pih)*r_earth
 nz=H['nz']
 nx=H['nx']
 ny=H['ny']
 outlat0=H['outlat0']
 dyout=H['dyout']
 dxout=H['dxout']
 area=N.zeros((nx,ny)) #creates numpy array

 for iy in range(ny):
  ylata=outlat0+(float(iy)+0.5)*dyout
  ylatp=ylata+0.5*dyout
  ylatm=ylata-0.5*dyout
  if (ylatm<0 and ylatp>0): hzone=dyout*r_earth*pih
  else:
   cosfact=cosfunc(ylata)
   cosfactp=cosfunc(ylatp)
   cosfactm=cosfunc(ylatm)
   if cosfactp<cosfactm: hzone=math.sqrt(r_earth**2-cosfactp**2)-math.sqrt
(r_earth**2-cosfactm**2)
   else: hzone=math.sqrt(r_earth**2-cosfactm**2)-math.sqrt
(r_earth**2-cosfactp**2)

  gridarea=2.*math.pi*r_earth*hzone*dxout/360.
  for ix in range(nx):
   print nx, ix, iy
   area[ix,iy]=gridarea

 return area #returns numpy array of area



Here's the traceback:

...

360 357 9
360 358 9
360 359 9
360 0 10
OverflowError: long int too large to convert to int
Traceback:
  File "<string>", line 1, in ?
  File "c:\07\Programming\Python\mod_fp\getfp.py", line 11, in ?
    H,fail=readheader(pathname,1,0)
  File "c:\07\Programming\Python\mod_fp\mod_fp.py", line 170, in readheader
    H['area'] = gridarea(H)
  File "c:\07\Programming\Python\mod_fp\mod_fp.py", line 332, in gridarea
    area[ix,iy]=gridarea
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