How to replace values in an attribute table for one column?

Question

I need to replace values in an attribute table for one column (replace zeroes in column named "label" to 100). Is this possible using ogr or python? I have to do this for 500+ shapefiles.

Answer 1

In the Esri ArcGIS realm, Update Cursors are typically used for this type of operation.

For example

import arcpy

# Your input feature class
fc = r'C:\path\to\your.gdb\feature_class'

# Start an update cursor and change values from 0 to 100 in a field called "your_field"
with arcpy.da.UpdateCursor(fc, "your_field") as cursor:
    for row in cursor:
        if row[0] == 0:
            row[0] = 100
        cursor.updateRow(row)