diff --git a/pyaerocom/config.py b/pyaerocom/config.py
index 23e86a952..e5de58112 100644
--- a/pyaerocom/config.py
+++ b/pyaerocom/config.py
@@ -1,4 +1,4 @@
-import getpass
+reimport getpass
 import logging
 import os
 from configparser import ConfigParser
diff --git a/pyaerocom/io/readgridded.py b/pyaerocom/io/readgridded.py
index b33c02692..40c2bd1b6 100755
--- a/pyaerocom/io/readgridded.py
+++ b/pyaerocom/io/readgridded.py
@@ -170,7 +170,6 @@ class specifying details of the file naming convention for the model
     VERT_ALT = {"Surface": "ModelLevel"}
 
     def __init__(self, data_id=None, data_dir=None, file_convention="aerocom3"):
-
         self._data_dir = None
 
         #: data_id of gridded dataset
@@ -444,7 +443,6 @@ def _check_var_match_pattern(self, var_name):
             if fnmatch.fnmatch(var_name, pattern):
                 vars_required = self.AUX_REQUIRES[pattern]
                 for addvar in vars_required:
-
                     if not "*" in addvar:
                         vars_found.append(addvar)
                     else:
@@ -696,6 +694,7 @@ def _update_file_convention(self, files):
         FileNotFoundError
             if none of the input files matches a registered convention.
         """
+        breakpoint()
         for file in files:
             try:
                 self.file_convention.from_file(os.path.basename(file))
@@ -1663,7 +1662,6 @@ def read_var(
         )
 
         if constraints is not None:
-
             if isinstance(constraints, dict):
                 constraints = [constraints]
             for constraint in constraints:
diff --git a/pyaerocom/plugins/tropomi/reader.py b/pyaerocom/plugins/tropomi/reader.py
index 555253901..973685ac2 100644
--- a/pyaerocom/plugins/tropomi/reader.py
+++ b/pyaerocom/plugins/tropomi/reader.py
@@ -10,7 +10,7 @@
 import xarray as xr
 
 from pyaerocom import const
-from pyaerocom.io.readgridded import ReadGriddedBase
+from pyaerocom.io.readgridded import ReadGridded
 from pyaerocom.stationdata import StationData
 from pyaerocom.griddeddata import GriddedData
 
@@ -35,7 +35,7 @@
 )
 
 
-class ReadTropomiL3(ReadGriddedData):
+class ReadTropomiL3(ReadGridded):
     """
     Class to read processed TROPOMI data (homebrewed L3 data) for use in SESAM.
     e.g., Tropospheric vertical column of nitrogen dioxide
@@ -50,4 +50,4 @@ def __init__(self, data_id=None, data_dir=None):
         if data_dir is None:
             data_dir = TMP_DATA_DIR
             # raise Exception("Need a data_dir")
-        super.__init__()
+        super().__init__(data_dir=data_dir)