All Questions
21 questions
3
votes
1
answer
343
views
Deleting shapefile after removing it with removeMapLayer using PyQGIS
I am currently working on a script that searches for a currently loaded layer in PyQGIS and does some calculations. Then it removes the layer and deletes the whole shapefile in its directory.
...
- 477
4
votes
1
answer
1k
views
"AttributeError: 'dict' object has no attribute 'fields'" error when creating and deleting fields in the attribute table using PyQGIS
I am currently making a code that will buffer the points then extract vertices and add new coordinates. but I also want to change the "max depth" column to "Height Theo" and then ...
- 171
3
votes
1
answer
182
views
Why is it slow when deleting features in gpkg using PyQGIS?
Deleting features in a somewhat big GeoPackage takes a really long time and I am not sure if I do something wrong or if it is normal that it takes such a long time.
Data: line GeoPackage layer ...
- 4,049
4
votes
1
answer
313
views
Deleting specific attributes of layer using PyQGIS
I want to delete specific columns in the attribute table of my layer:
except for the "LAYER" Column.
This is my code:
clip = processing.runAndLoadResults("native:clip",
...
- 163
9
votes
1
answer
229
views
Deleting parts of MultiPolygon based on area using PyQGIS
I have a layer with MultiPolygons. Some of them have parts less than five m2 which I want to delete.
The QgsGeometry class has methods: parts() and deletePart(self, partNum: int). On parts() I can ...
- 659
4
votes
1
answer
165
views
Adding and deleting fields in shapefile using PyQGIS
As part of a project, I have to extract X, Y coordinates from points in a shapefile, and classify each point as North or South, or East or West.
To do so, I created new fields:
a field to store the X ...
- 43
4
votes
2
answers
646
views
Deleting all fields from attribute table in QGIS processing script
I'm writing a script in the processing script editor of QGIS and at one point i want to delete all columns of my vector layer's attribute table. I tried to do it like this:
lst = list(range(0,-1))
...
- 107
4
votes
1
answer
1k
views
Deleting folder and processed files in QGIS using PyQGIS
My script creates a folder named 'output' and saves processed files there. I am trying to delete this folder and all files within it, if I need to re-run the script (see reproducible example at the ...
- 10.3k
4
votes
1
answer
212
views
Setting selected features in list without specifying their layer using PyQGIS
To get selected features I usually do: layer.selectedFeatures().
Is there a method to retrieve selected features in a list without specifying the layer they belong to ?
I selected features with the &...
- 133
1
vote
1
answer
250
views
Deleting created custom CRS using PyQGIS
How can I delete custom CRS by PyQGIS?
My not working solution is:
my_crs = QgsCoordinateReferenceSystem()
my_crs.createFromProj4("+proj=aea +lat_1=21 +lat_2=49 +lat_0=37 +lon_0=87 +x_0=0 +y_0=0 +...
- 752
1
vote
0
answers
744
views
PyQGIS 'str' object has no attribute 'fields' [closed]
I'm trying to write my first Python script from template in QGIS. I want to delete all fields except specific ones. Therefore I create a list to fill it with all the field names except the specific ...
- 11
2
votes
0
answers
239
views
Permission error when trying to delete shapefiles with PyQGIS
The task is to merge many layers in a folder (temp_layer) and check for valid geometry for further processing. The folder where are the layer data are is external and should be copied local for ...
1
vote
1
answer
306
views
Edit CSV not-spatial table in PyQGIS
I am trying to edit a not-spatial CSV table in PyQGIS 2.18 (i.e. deleting existing fields and adding new one ) for the first time (I can do it with polygonal vector layers but I guess something is ...
- 185
3
votes
1
answer
99
views
Deleting columns by indexes with PyQGIS
In QGIS 3.4, I am building a model for importing and preparing multiple data by merging shapes and joining tables.
I am almost finished with the model, but I haven't found a useful tool for deleting ...
- 33
3
votes
1
answer
1k
views
Deleting vertices from line feature using PyQGIS
I have a line made of 17959 nodes. I want to delete several range of nodes from that line with a Python command.
For example I want to delete all nodes between node 5530 to node 5861 and connect node ...
- 503
1
vote
0
answers
1k
views
Deleting shapefile with QGIS?
This is a follow-up question to an answer to Deleting Shapefiles using QGIS?
I tried to run the script, however it always returns False and the shapefile is not deleted - any ideas what needs to be ...
- 11
11
votes
2
answers
6k
views
Deleting all features of Vector layer using PyQGIS
I am developing a Python plugin for QGIS. In the QGIS map window, certain features of a vector layer are selected and those features are highlighted. Now I need to delete all the existing features ...
- 1,007
4
votes
1
answer
423
views
Recursive loop to modify vector layer and refresh mapcanvas
I'm trying to plot one point "jumping" each second in the canvas (like a gps tracking). I need to take points from a .csv file.
This functionality is made in a QWidget of my application, so the code ...
- 53
6
votes
1
answer
1k
views
How to replace a shapefile name in a directory using Python QGIS?
How to replace name or delete .shp file from directory using Python QGIS ?
import os
import processing
input = "//input.shp"
output = "//output_100.shp"
interval = 100
processing.runalg("qgis:...
- 982
13
votes
3
answers
12k
views
Deleting selected features using PyQGIS
I have a shapefile with only one field "DN". I would like to delete all features which does not have specific value of the field. Let's say the "DN" can be 1,2 or 3.
So far I was ...
- 359
10
votes
3
answers
13k
views
Deleting column/field in PyQGIS
How to remove or delete column fields in a shapefile using PyQGIS?
- 871