通过新的Writer对象在Python中编辑shapefile不起作用

Question

I'm currently following a Python geospatial analysis tutorial book by Joel Lawhead, and I'm running into an error when trying to edit shapefiles.

The shapefile I'm using is available a http://git.io/vLd8Y . I'm running my code in a Jupyter Notebook on python3.

This is my code. I'm simply reading in a shapefile as a Reader object r , and creating a new Writer object w with the same shapetype as r . Then, I'm attempting to attach the records from r to w .

import shapefile
r = shapefile.Reader("NYC_MUSEUMS_GEO")
w = shapefile.Writer(r.shapeType)
w.fields = list(r.fields)
w.records.extend(r.records())

However, I'm running into this error:

AttributeError                            Traceback (most recent call last)
<ipython-input-151-ceee096fbafa> in <module>()
      6 w = shapefile.Writer(r.shapeType)
      7 w.fields = list(r.fields)
----> 8 w.records.extend(r.records())

AttributeError: 'Writer' object has no attribute 'records'

Any ideas why?

Answer 1

I am unable to reproduce the problem you've described. I started with:

$ python
Python 3.5.4 (default, Oct  9 2017, 12:07:29) 
>>>

And install the pyshp module:

$ pip install pyshp
...
Successfully installed pyshp-1.2.12

And now:

$ python
Python 2.7.13 (default, Dec  1 2017, 09:21:53) 
[GCC 6.4.1 20170727 (Red Hat 6.4.1-1)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import shapefile
>>> r = shapefile.Reader("NYC_MUSEUMS_GEO")
>>> w = shapefile.Writer(r.shapeType)
>>> w.fields = list(r.fields)
>>> w.records.extend(r.records())
>>> len(w.records)
130

Do the python and pyshp versions you are working with match what I am using? If not, can you update your question to include the specific details of your environment?

Answer 2

I've been having this same issue. It seems that w.records.extend(r.records()) is no longer possible to do in the new version of pyshp. The correct method to do this is now:

for shaperec in r.iterShapeRecords():
   w.record(*shaperec.record)
   w.shape(shaperec.shape)

Please see an explanation for the change and more context around the above code here .