diff --git a/api/api_parser.py b/api/api_parser.py
index c02ab98..69c35a1 100644
--- a/api/api_parser.py
+++ b/api/api_parser.py
@@ -38,7 +38,7 @@ section_name = ['TITLE',    'JUNCTIONS', 'RESERVOIRS', 'TANKS',       'PIPES',
                 'TIMES',    'REPORT',    'OPTIONS',    'COORDINATES', 'VERTICES',
                 'LABELS',   'BACKDROP',  'END']
 
-def parse_inp(inp: str) -> dict[str, list[str]]:
+def _parse_inp(inp: str) -> dict[str, list[str]]:
     file: dict[str, list[str]] = {}
     for s in section_name:
         file[s] = []
@@ -71,8 +71,8 @@ def parse_inp(inp: str) -> dict[str, list[str]]:
     return file
 
 
-def read_inp(project: str, inp: str):
-    file = parse_inp(inp)
+def _read_inp(inp: str) -> ChangeSet:
+    file = _parse_inp(inp)
 
     file_cs: dict[str, ChangeSet] = {}
     for s in section_name:
@@ -205,6 +205,10 @@ def read_inp(project: str, inp: str):
     for s in priorities:
         cs.merge(file_cs[s])
 
+    return cs
+
+
+def read_inp(project: str, inp: str):
     if is_project_open(project):
        close_project(project)
 
@@ -214,7 +218,7 @@ def read_inp(project: str, inp: str):
     create_project(project)
     open_project(project)
 
-    execute_batch_commands(project, cs)
+    execute_batch_command(project, _read_inp(inp))
 
 
 def dump_inp(project: str, inp: str):