I want to calculate the length of a line shape file using python scripting. Pls somebody help me do this
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Hi @jelango1996
Why don't you use the LengthCalculator transformer?
https://www.safe.com/transformers/length-calculator/
While I agree that the LengthCalculator is the simplest option, if you absolutely need to use the python caller, the FMECurve class has a getLength{} method.
geom = feature.getGeometry()
length = geom.getLength(False)
Use true if you want the 3D length.
Note that this will throw an error if your geometry is not a curve (line).
I wouldn't be trying to solve everything with Python in FME
You can also use the FMEFeature.performFunction to call the @Length() function. e.g.
len2 = float(feature.performFunction('@Length(2)')) # 2D Length
len3 = float(feature.performFunction('@Length(3)')) # 3D Length
With this method, the result will be equal to the result from the LengthCalculator. That is, the length can be computed even if the input geometry is not a Curve (e.g. the perimeter of an Area feature).
I usually use the LengthCalculator transformer or sometimes use the @Length() function within a transformer parameter (not with Python script), unless there is a specific reason for using Python script.