How to get the field name for data?

[jiaoL06]

What's your question?

when I create the shapefile,such as:
w = shapefile.Writer(shapname)
w.field("name1", "C")
w.linez([data1])
w.record("cross1")
w.field("name2", "C")
w.linez([data2])
w.record("line1")
w.close()
Then I read the shapefile:
sf = shapefile.Reader(shapname)
datas = sf.shapes()
for data in datas:
points = data.points
x, y = zip(*points)
z = data.z

How to get the field name for data(x,y,z)?

[JamesParrott]

The field names are the same for all shapes. The name is the first item in the list for each field.

https://github.com/GeospatialPython/pyshp#reading-records

To see the fields for the Reader object above (sf) call the "fields" attribute:

>>> fields = sf.fields

e.g.:

[('DeletionFlag', 'C', 1, 0), ['name', 'C', 50, 0]]

To preserve the association between shapes and their records, I find it best to iterate over sf.shapeRecords()

https://github.com/GeospatialPython/pyshp#reading-geometry-and-records-simultaneously

This yields shapeRecords, which have a record attribute, which has a really nice ._as_dict method. The keys of the dictionary that returns are the field names.

with shapefile.Reader(shapname) as sf:
    for shaperec in sf.shapeRecords():
        points = shaperec.shape.points
        x, y = zip(*points)
        z = shaperec.shape.z   # I think, but haven't got a 3D shapefile right now to test this
        
        record_dict = sr.record.as_dict()

        fields = record_dict.keys()
        values = record_dict.values()