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vb2python

FelixMuyoba

hi there,
can anyone assist me please on this query?
a script that will require an IF statement for summing numbers cumulatively if they satisfy a certain condition or not summing them if they do not satisfy the condition. This is what i had in VB but wants that to be PYTHON:
Static rec As Double
Dim pStart As Double
Dim pInterval As Double
pStart = 1
pInterval = 1
If (rec = 0) Then
rec = pStart
Else
rec = rec + pInterval
End If

can anyone help please?

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FelixMuyoba

gasior,
this looks exactly what I am looking for because what i want is a script that will require an IF statement for summing numbers cumulatively if they satisfy a certain condition or not summing them if they do not satisfy the condition.

MarcinGasior

I'm not sure what exactly do you want to calculate. Please explain.
Here is a thought how Code Block may be:

def conditional(sourceField, Offset):
  dSum = 0
  if Offset > 0:
    dSum = sourceField
  else:
    dSum += sourceField
  return dSum

Expression:

conditional(!sourceField!,!Offset!)

FelixMuyoba

thanks, Gasior everything works perfectly now..i guess it was just an oversight from side..now, how do i modify these codes to python format?
Static rec As Long
Static dSum As Double
Dim sourceField
If ([Offset] > 0) Then
dSum = sourceField
Else
dSum = sourceField + dSum
End If
rec = rec + 1

please help!

MarcinGasior

Which code doesn't work? In which tool? What errors are generated?

I tried to run the code in ArcGIS 9.3 Calculate Field tool. It works ok. The settings are here:
[ATTACH=CONFIG]14197[/ATTACH]

CalculateField_Python93.png

FelixMuyoba

hi gasior,
i tried those codes and they don't work and the results window in geoprocessing shows PYTHON 9.3..is there something I'm missing?

FelixMuyoba

thanks, gasior..will look at it

MarcinGasior

At Calculate Field examples help page there's a script in Python:

Code Block:
rec=0
def autoIncrement():
 global rec
 pStart = 1 #adjust start value, if req'd 
 pInterval = 1 #adjust interval value, if req'd
 if (rec == 0): 
  rec = pStart 
 else: 
  rec = rec + pInterval 
 return rec

Expression:
autoIncrement()

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