How to load image sequence for texture node via code

Question

I would like to assign an image sequence to the ShaderNodeTexImage

texture_path = 'folder/texture.1.jpg'
tex = matnodes.new('ShaderNodeTexImage')
img = bpy.data.images.load(texture_path)
tex.image = img
tex.image.source = 'SEQUENCE'

I have texture.#.jpg images in the folder.

EDIT

I changed my code to following and got this result:

# new material
mat = bpy.data.materials.new('mat')
mat.use_nodes = True
nodes = mat.node_tree.nodes
nodes.clear()
Add the Principled Shader node
node_principled = nodes.new(type='ShaderNodeBsdfPrincipled')
node_principled.location = 0,0
#new texture
node_tex = nodes.new('ShaderNodeTexImage')
node_tex.location = -400,0

node_tex.image = bpy.data.images.load("//textures/texture.1.jpg")
node_tex.image.source = 'SEQUENCE'
node_tex.image_user.use_auto_refresh = True
node_tex.image_user.frame_duration = 350
node_tex.image_user.frame_start = 1
node_tex.image_user.frame_offset = 0
node_output = nodes.new(type='ShaderNodeOutputMaterial')

node_output.location = 400,0
Link all nodes
links = mat.node_tree.links
link = links.new(node_tex.outputs["Color"], node_principled.inputs["Base Color"])
link = links.new(node_principled.outputs["BSDF"], node_output.inputs["Surface"])
n_slots = len(obj.material_slots)
for slot in range(n_slots):
    obj.data.materials[slot] = mat

The code above still has the same issues as before. basically the only thing changed was the auto_refresh_part

Answer 1

Similar to How to load an image from disc and assign it to a newly created image texture node? you can use BlendDataImages.load() to load and assign the image (sequence) to the texture node in one go. Just make sure Image.source is set to 'SEQUENCE' and ImageUser.use_auto_refresh is enabled (as mentioned by @scurest in the comments):

import bpy
Get the active material of the object in context
mat = bpy.context.object.active_material
Get the nodes
nodes = mat.node_tree.nodes
nodes.clear()
Add the Principled Shader node
node_principled = nodes.new(type='ShaderNodeBsdfPrincipled')
node_principled.location = 0,0
Add the Image Texture node
node_tex = nodes.new('ShaderNodeTexImage')
node_tex.location = -400,0
"//" prefix is a Blender specific identifier for the current blend file
node_tex.image = bpy.data.images.load("//seq/your_image_sequence_0001.exr")
node_tex.image.source = 'SEQUENCE'
Sequence Properties
node_tex.image_user.use_auto_refresh = True
node_tex.image_user.frame_duration = 350
node_tex.image_user.frame_start = 1
node_tex.image_user.frame_offset = 0
Add the Output node
node_output = nodes.new(type='ShaderNodeOutputMaterial')

node_output.location = 400,0
Link all nodes
links = mat.node_tree.links
link = links.new(node_tex.outputs["Color"], node_principled.inputs["Base Color"])
link = links.new(node_principled.outputs["BSDF"], node_output.inputs["Surface"])