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user 2581
For processes that involve enumeration or listing the finite number of iterations in an object, layer, feature, or other measurable instance.
6
votes
Getting number of features in the Attribute table using PyQGIS
layer.getFeatures() is a Python Iterator (type: QgsFeatureIterator) so
num_of_features = len(list(layer.getFeatures()))
or you can use list comprehension:
num_of_features = len([feature for feature i …
- 55.4k
3
votes
Counting vertices and adding it as number to column using shapely
In Modify pandas DataFrame within iterrows loop
The rows you get back from iterrows are copies that are no longer connected to the original data frame, so edits don't change your DataFrame. However, …
- 55.4k
7
votes
Getting the number of features in shapefile without opening it using Python
If you only need the number of features, use the standard Python module struct (used by pyshp). You only need to read the first bytes of the dbf or the .shp files (Raw Binary Files):
a) .dbf file : t …
- 55.4k