Select objects with name sequence

Question

I'm trying to organize a big scene file where some objects has this name (small sample) "US40.004, US40.005, US41.001, US51.006" or even possible for the names to be like this "US-009.009, US-009.010, US-015, US-016" as you can see the names are incremental or in sequence, and then I have some other objects with the name "USA, USDOT"

On my script I ask to select all the objects with "US" in their names but it select also the "USA, USDOT" which I don't want then to be selected.

Is there a way to tell the script to focus on selecting the objects that has US plus the sequence?

I hope this makes sense.

Here is my code so far:

import bpy


params = ["US", "US-"]

for obj in bpy.context.scene.objects:
    if any(x in obj.name for x in params):
        obj.select_set(True)
        bpy.context.view_layer.objects.active = obj
    else: 
        obj.select_set(False)

Answer 1

well, unfortunately you did not exactly specify, which ones should be included and which ones not.

it basically uses regular expressions and searches for starting characters "US" and then an optional "-" and a number. Then a match is found. Since you know python i think you are able to adapt that to your code. Have fun!

So i made it like this:

import re
    
txt = {"US40.004", "US40.005", "US41.001", "US51.006", "US-009.009", "US-009.010", "US-015", "US-016", "USA", "us30.0055", "uS30.99"}
    
for eachText in txt:
    x = re.findall("US[-]?\d", eachText.upper())
        
    if (x):
        print("Yes, there is at least one match!", eachText)
    else:
        print("No match", eachText)

result:

Yes, there is at least one match! US-009.010
Yes, there is at least one match! us30.0055
Yes, there is at least one match! US51.006
Yes, there is at least one match! US-016
Yes, there is at least one match! uS30.99
Yes, there is at least one match! US-009.009
Yes, there is at least one match! US41.001
Yes, there is at least one match! US40.004
Yes, there is at least one match! US-015
Yes, there is at least one match! US40.005
No match USA

my change was just this: eachText.upper() -> so i convert the text to uppercase before i check whether it fits or not.

Answer 2

bpy.ops.object.select_pattern

As mentioned in your previous question re the operator script Script is selecting all the objects (unwanted) there is already a pattern matching operator, bpy.ops.object.select_pattern which uses Unix file token matching. See no need to "reinvent the wheel" and write another, which so far has no extra functionality. Here is quick run down on how it works. (The code of the operator is available in bl_operators/object.py.)

>>> bpy.ops.object.select_pattern(
select_pattern()
bpy.ops.object.select_pattern(pattern="*", case_sensitive=False, extend=True)
Select objects matching a naming pattern

options to extend the selection, and a case insensitive match.

>>> import fnmatch
>>> fnmatch.fnmatch(
fnmatch(name, pat)
Test whether FILENAME matches PATTERN.
Patterns are Unix shell style:
*       matches everything
?       matches any single character
[seq]   matches any character in seq
[!seq]  matches any char not in seq
An initial period in FILENAME is not special.
Both FILENAME and PATTERN are first case-normalized
if the operating system requires it.
If you don't want this, use fnmatchcase(FILENAME, PATTERN).

So for example sake will pinch

>>> txt = {"US40.004", "US40.005", "US41.001", "US51.006", "US-009.009", "US-009.010", "US-015", "US-016", "USA", "USADOT"}

make a pattern, Case sensitive, any name starting with "US" but not having an uppercase character as third character. then end with anything

>>> pattern = "US[!A-Z]*"
>>> for t in txt:
...     t, fnmatch.fnmatchcase(t, pattern)
...     
('US-009.009', True)
('US40.005', True)
('US41.001', True)
('US51.006', True)
('US-016', True)
('US-009.010', True)
('USA', False)
('USADOT', False)
('US-015', True)
('US40.004', True)

Looks about right, so a call with instead object names matching the sample list

bpy.ops.object.select_pattern(pattern="US[!A-Z]*", case_sensitive=True)

in object mode will select all objects denoted True above

To clarify, re the commentary below, it is not necessary to use the operator could (thought this was implied TBH) instead

for ob in scene.objects:
    ob.select_set(fnmatch.fnmatchcase(ob.name, pattern)) # match case

Re setting the active object. If the context object is no longer selected, or None and you wish it to be one of the selected

if context.selected_objects and context.object not in context.selected_objects:
    context.view_layer.objects.active = context.selected_objects[0]

ie If the active object is set and selected probably don't want to randomly change it to another of the selected objects. (BTW most selection operators do not set the active object)