diff --git a/lib/getpositions.py b/lib/getpositions.py
index cb5c1a1..c7c319c 100644
--- a/lib/getpositions.py
+++ b/lib/getpositions.py
@@ -81,6 +81,9 @@ def get_attributes_of_insert(d_insert: dict, d_pos: dict) -> tuple[dict, str, st
         attr_text = d_insert["IO"]
         typ = get_type_of_name_cfg(attr_text)
         id_ = d_insert["IO"]
+        # Sensoren werden später gemerged mit den anderen Blöcken des Rahmens mit A,B,C, usw
+        if "SPS" in d_insert and typ != "Sensor":
+            id_ = id_+"@"+d_insert["SPS"] 
         pos = d_pos["IO"]
 
         if "REALE_POSITION" in d_insert and d_insert["REALE_POSITION"] == 'x':
@@ -183,6 +186,25 @@ class CompareBuffer:
         return l
 
 def extract_input_positions(insert_iterable) -> tuple[dict, dict, dict, dict]:
+    """
+    Extracts and organizes input positions from an iterable of inserts.
+
+    This function processes a list of insert objects (e.g., from a DXF file), classifies them by type
+    (Sensor, Kabel, Schaltschrankelement, or unknown), and organizes them into dictionaries keyed by their IDs.
+    For sensors, it handles the special case where sensor information may be split across multiple blocks
+    (e.g., IO and A,B,C blocks) and merges them if necessary. It also collects information about missing
+    attributes and duplicate IDs for further error handling.
+
+    Args:
+        insert_iterable: An iterable of insert objects to process.
+
+    Returns:
+        A tuple containing:
+            - all_sensors: dict of sensor IDs to sensor attribute dicts
+            - all_schaltschrank: dict of Schaltschrankelement IDs to their attribute dicts
+            - double_ids: dict of IDs with multiple associated blocks (potential duplicates)
+            - missing_attribs: dict of IDs with missing or incomplete attributes
+    """
     all_sensors = dict()
     all_cables = dict()
     all_schaltschrank = dict()
@@ -219,6 +241,17 @@ def extract_input_positions(insert_iterable) -> tuple[dict, dict, dict, dict]:
     return all_sensors, all_schaltschrank, double_ids, missing_attribs
 
 def get_errors_double_and_attributes(wp: CompareBuffer) -> tuple[dict, dict]:
+    """
+    Analyze the CompareBuffer for blocks that could not be merged or assigned.
+
+    This function inspects the CompareBuffer for:
+      - IDs with only a single associated block, which likely indicates missing or incomplete attributes.
+      - IDs with multiple associated blocks, which may indicate duplicate or ambiguous entries.
+
+    Returns:
+        missing_attribs: dict mapping IDs to a message about missing or incomplete attributes.
+        double_ids: dict mapping IDs to a list of positions for blocks with duplicate IDs.
+    """
     missing_attribs = dict()
     double_ids = dict()
     for id_ in wp.get_block_ids():
@@ -237,8 +270,21 @@ def get_errors_double_and_attributes(wp: CompareBuffer) -> tuple[dict, dict]:
     return missing_attribs, double_ids
 
 def allocate_blocks_together(all_sensors: dict, wp: CompareBuffer) -> None:
-    """geht alle gemerkten Sensoren durch die gleich heissen. 
-    Falls ein SPS Präfix angegeben wird, wird es zur Id hinzugefügt und als neuer Name gemerkt """
+    """
+    Merge sensor blocks with the same ID that are split across multiple DXF blocks.
+
+    This function iterates over all sensor IDs stored in the CompareBuffer. For each ID, it looks for blocks
+    with and without an "SPS" prefix. If two such blocks have positions that are close to each other (within a
+    specified tolerance), they are considered to represent the same physical sensor. The function then merges
+    their information into a single dictionary, creates a new unique sensor ID by appending the SPS prefix,
+    and adds the merged sensor to the all_sensors dictionary. The merged blocks are then removed from the buffer.
+
+    Args:
+        all_sensors (dict): Dictionary to store merged sensor information, keyed by unique sensor IDs.
+        wp (CompareBuffer): Buffer containing blocks that could not be directly assigned, grouped by ID.
+    """
+    #geht alle gemerkten Sensoren durch die gleich heissen. 
+    # Falls ein SPS Präfix angegeben wird, wird es zur Id hinzugefügt und als neuer Name gemerkt
     all_sensors_ids = wp.get_block_ids() 
     for id_ in all_sensors_ids:
         blks_sps = wp.get_all_sps_blocks(id_) 
@@ -264,6 +310,14 @@ def create_new_id(id_: str, dict1: dict, dict2: dict) -> str:
     return f"{id_}@{sps_praefix}"
 
 def attribs_to_dicts(insert_iterable) -> tuple[list, list]:
+    """
+    Wandelt eine Iterable von INSERT-Objekten in zwei Listen um:
+    - all_inserts: Liste von Dictionaries mit Attribut-Tags und deren Textwerten
+    - all_positions: Liste von Dictionaries mit Attribut-Tags und deren (x, y, z)-Positionen (jeweils gerundet auf eine Nachkommastelle)
+
+    Jeder Eintrag in den Listen entspricht einem INSERT-Block mit Attributen.
+    Blöcke ohne Attribute werden übersprungen.
+    """
     all_inserts = list()
     all_positions = list()
     for insert in insert_iterable:
@@ -285,10 +339,10 @@ def attribs_to_dicts(insert_iterable) -> tuple[list, list]:
             all_positions.append(positions)
     return all_inserts, all_positions
 
-def get_input_positions(msp) -> tuple[dict, dict, dict]:
+def get_input_positions(msp) -> tuple[dict, dict, dict, dict]:
     return extract_input_positions(msp.query('INSERT'))
 
-def get_input_positions_iter(dxf_path) -> tuple[dict, dict, dict]:
+def get_input_positions_iter(dxf_path) -> tuple[dict, dict, dict, dict]:
     return extract_input_positions(iterdxf.modelspace(dxf_path))
 
 def create_mappings(positions: dict) -> tuple[dict, dict]:
diff --git a/lib/portalexport.py b/lib/portalexport.py
index fc2056f..ecd80e8 100644
--- a/lib/portalexport.py
+++ b/lib/portalexport.py
@@ -6,24 +6,24 @@ import json
 from pathlib import Path
 
 def process_item(sname, sdata):
-        data = {
-            "id": sdata.get("IO", ""),
-            "bezeichnung": sdata.get("BEZEICHNUNG", ""),
-            "verwendung": sdata.get("VERW", ""),
-            "kennzeichnung": sdata.get("KENNZEICHNUNG", ""),
-            "text_d": sdata.get("TEXT-D", ""),
-            "text_e": sdata.get("TEXT-E", ""),
-            "text_es": sdata.get("TEXT-ES", ""),
-            "text_f": sdata.get("TEXT-F", ""),
-            "sps": sdata.get("SPS", None),
-        }
-        reihenfolge = ["id", "bezeichnung", "verwendung", "kennzeichnung", "text_d", "text_e", "text_es", "text_f"]
-        # CSV-String erzeugen
-        csvstr = "','".join(str(data[key]) for key in reihenfolge)
-        csvstr = "'"+csvstr+"'"
+    data = {
+        "id": sdata.get("IO", ""),
+        "bezeichnung": sdata.get("BEZEICHNUNG", ""),
+        "verwendung": sdata.get("VERW", ""),
+        "kennzeichnung": sdata.get("KENNZEICHNUNG", ""),
+        "text_d": sdata.get("TEXT-D", ""),
+        "text_e": sdata.get("TEXT-E", ""),
+        "text_es": sdata.get("TEXT-ES", ""),
+        "text_f": sdata.get("TEXT-F", ""),
+        "sps": sdata.get("SPS", None),
+    }
+    reihenfolge = ["id", "bezeichnung", "verwendung", "kennzeichnung", "text_d", "text_e", "text_es", "text_f"]
+    # CSV-String erzeugen
+    csvstr = "','".join(str(data[key]) for key in reihenfolge)
+    csvstr = "'"+csvstr+"'"
 
-        sps_nr = sdata.get("SPS", None)
-        return csvstr, sps_nr
+    sps_nr = sdata.get("SPS", None)
+    return csvstr, sps_nr
 
 def prepare_data(rawdata:dict):
     sensors = rawdata["sensors"]
diff --git a/lib/routing.py b/lib/routing.py
index 8db359e..4bc4170 100644
--- a/lib/routing.py
+++ b/lib/routing.py
@@ -1,16 +1,12 @@
-import os
 import json
-import argparse
-import heapq
-import math
-import matplotlib.pyplot as plt
 import networkx as nx
-import shapely
-from shapely.geometry import LineString, Point
-from shapely.ops import nearest_points
+from shapely.geometry import Point
 from plant import Anlage
-import configparser
 from pathlib import Path
+import argparse
+import os
+import configparser
+import matplotlib.pyplot as plt
 
 
 # Funktionen