Converting a VB script into Python

[SLouq]

I had some VB code in one of my Calculate Field modules in modelbuilder. I am trying to convert it to Python
Can anybody help me with this?

IF RTRIM([PRE_DIR]) = " " then

MyLabel = LTRIM([STR_NAME]) & " " & [SUF_FIX]

else

MyLabel = RTRIM([PRE_DIR]) & " " & LTRIM(RTRIM([STR_NAME])) & " " & [SUF_FIX]

end If

Thanks

[RobertBorchert · Accepted solution]

If you have it in model builder simply open it in model builder.

Then under Model and Export you can export it automatically to a python scrip.

[SLouq]

Thanks Robert! I knew there was an easy way to do this. HAHA!

[SLouq]

I know I marked your response as correct and it may be correct but I'm still getting an error when trying to convert my if statement to python. I tried this but it isn't working

If (!PRE_DIR!).RTrim() = " "

   print(!STR_NAM!) + " " + (!SUF_FIX!)

else

   print(!PRE_DIR!).RTrim() + " " + LTrim (RTrim(!STR_NAME!)) + " " +

Return !SUF_FIX!

Any help would be appreciated!

Thanks

[RobertBorchert]

Whatever your trying to convert it does not look like it came from Model Builder. 

I have used VB code in model builder expressions in the past and if they work in model builder, which I am assuming yours do, they should convert to python and the code from your last post is not python.  Or are you just posting the original VB code.

[SLouq]

I know I have the syntax wrong because I am very unfamiliar with python syntax. I have just been looking at python examples on the internet and doing what I thought would work since what I had in VB works. Here is a screenshot of the Calculate Field module I have in python.

[RobertBorchert]

What does the syntax look like when you open the python script after you export it as python

[SLouq]

# Process: Calculate Field (2)
arcpy.CalculateField_management(clines__5_, "LABEL", "RTRIM([PRE_DIR]) & \" \" & LTRIM(RTRIM([STR_NAME])) & \" \" & [SUF_FIX]", "VB", "IF RTRIM([PRE_DIR]) = \" \" then\\n    MyLabel = LTRIM([STR_NAME]) & \" \" & [SUF_FIX]\\nelse\\n

[RobertBorchert]

That looks like it should work when you run the python script. 

[SLouq]

Then I just need to learn how to enter it into the prelogic part of the module.

Thank you for helping me figure out this issue Robert!