good init

setup.py

@@ -6,6 +6,7 @@
     description='Timestamp treatment, time-shift finder and more.',
     long_description=open('README.md').read(),
     long_description_content_type='text/markdown',
+    packages=find_packages(),
     url='https://github.com/BernatNicolau/signalfixer',
     author='Bernat Nicolau',
     author_email='[email protected]',

signalfixer/__init__.py

@@ -1,6 +1,5 @@
 from signalfixer.version import __version__
-
 from signalfixer import (
     timestamp,
-    timeshift,
+    timeshift
 )

signalfixer/timeshift.py

@@ -1,6 +1,6 @@
 import pandas as pd
 import numpy as np
-import timestamp
+from signalfixer import timestamp
 
 
 def time_lag_pair(signal_ref, signal_eval, max_lag=4, freq="1min"):

signalfixer/timestamp.py

@@ -108,5 +108,5 @@ def sanitize_index(signal: pd.Series):
     if signal.empty:
         raise ValueError('Signal did not contain any index')
     if not isinstance(signal.index[0], pd.Timestamp):
-        raise ValueError('Signal did not contain any index')
+        raise ValueError('Signal index are not pd.Timestamp')
     return signal.sort_index()