Python, Change precision of all fields in a drawing

[Danielm103]

from pyrx import Ap, Ax, Db, Ed, Ge, Br

def getAllFieldsIds(db: Db.Database):
    ids: list[Db.ObjectId] = []
    nod = Db.Dictionary(db.namedObjectsDictionaryId())
    fieldListId = nod.getAt("ACAD_FIELDLIST")
    fieldList = Db.Core.entGet(fieldListId)
    for fieldItem in fieldList:
        if fieldItem[0] == 330 and fieldItem[1].isDerivedFrom(Db.Field.desc()):
            ids.append(fieldItem[1])
    return set(ids)

@Ap.Command()
def doit() -> None:
    db = Db.curDb()
    field_ids = getAllFieldsIds(db)
    for id in field_ids:
        field = Db.Field(id, Db.OpenMode.kForRead)
        fmt = field.getFormat()
        if 'pr3' in fmt:
            field.upgradeOpen()
            new_fmt = fmt.replace('pr3', 'pr4')
            field.setFormat(new_fmt)
            field.evaluate(Db.FieldEvalContext.kDemand, db) 
            print(f"Updated field format from {fmt} to {new_fmt}")