diff --git a/.DS_Store b/.DS_Store
new file mode 100644
index 0000000..3c36496
Binary files /dev/null and b/.DS_Store differ
diff --git a/Handle_emg_data.py b/Handle_emg_data.py
index a086d97..522cd27 100644
--- a/Handle_emg_data.py
+++ b/Handle_emg_data.py
@@ -1,4 +1,21 @@
 import pandas as pd
+from pathlib import Path
+
+class CSV_handler:
+
+    self.working_dir
+
+    def __init__():
+        self.working_dir = str(Path.cwd())
+
+    def make_df(self, filename)
+        filepath = self.working_dir + str(filename)
+        df = pd.read_csv(filepath)
+        return df
+
+    def get_time_emg_table(filepaths, subject_nr):
+        return None
+
+
 
-def get_time_emg_table(filepath, )
 
diff --git a/Signal_prep.py b/Signal_prep.py
index c09ebf0..62eeb3e 100644
--- a/Signal_prep.py
+++ b/Signal_prep.py
@@ -1,2 +1,5 @@
-import numpy
+import numpy as np 
+
+
+