diff --git a/scripts/retrieve_cutout.py b/scripts/retrieve_cutout.py
index b1461ded..fb33a9d5 100644
--- a/scripts/retrieve_cutout.py
+++ b/scripts/retrieve_cutout.py
@@ -1,10 +1,4 @@
-#!/usr/bin/env python3
-# -*- coding: utf-8 -*-
-"""
-Created on Mon Nov  4 18:37:11 2019
-
-@author: fabian
-"""
+## Copyright 2019 Fabian Hofmann (FIAS)
 
 import logging, os, tarfile
 from _helpers import progress_retrieve
@@ -12,15 +6,14 @@ from _helpers import progress_retrieve
 logger = logging.getLogger(__name__)
 
 if snakemake.config['tutorial']:
-    url =        "https://zenodo.org/record/3518020/files/pypsa-eur-tutorial-cutouts.tar.xz"
+    url = "https://zenodo.org/record/3518020/files/pypsa-eur-tutorial-cutouts.tar.xz"
 else:
-   url = "https://zenodo.org/record/3517949/files/pypsa-eur-cutouts.tar.xz"
+    url = "https://zenodo.org/record/3517949/files/pypsa-eur-cutouts.tar.xz"
 
-file = "./cutouts.tar.xz"
+tarball_fn = "./cutouts.tar.xz"
 
-progress_retrieve(url, file)
+progress_retrieve(url, tarball_fn)
 
-# extract
-tarfile.open('./cutouts.tar.xz').extractall()
-os.remove("./cutouts.tar.xz")
+tarfile.open(tarball_fn).extractall()
 
+os.remove(tarball_fn)
diff --git a/scripts/retrieve_databundle.py b/scripts/retrieve_databundle.py
index 9296388c..f402e237 100644
--- a/scripts/retrieve_databundle.py
+++ b/scripts/retrieve_databundle.py
@@ -1,28 +1,19 @@
-#!/usr/bin/env python3
-# -*- coding: utf-8 -*-
-"""
-Created on Mon Nov  4 18:37:11 2019
-
-@author: fabian
-"""
+## Copyright 2019 Fabian Hofmann (FIAS)
 
 import logging, os, tarfile
 from _helpers import progress_retrieve
 
 logger = logging.getLogger(__name__)
 
-
 if snakemake.config['tutorial']:
     url = "https://zenodo.org/record/3517921/files/pypsa-eur-tutorial-data-bundle.tar.xz"
 else:
-   url = "https://zenodo.org/record/3517935/files/pypsa-eur-data-bundle.tar.xz"
+    url = "https://zenodo.org/record/3517935/files/pypsa-eur-data-bundle.tar.xz"
 
-file = "./bundle.tar.xz"
+tarball_fn = "./bundle.tar.xz"
 
-progress_retrieve(url, file)
+progress_retrieve(url, tarball_fn)
 
-# extract
-tarfile.open('./bundle.tar.xz').extractall('./data')
-
-os.remove("./bundle.tar.xz")
+tarfile.open(tarball_fn).extractall('./data')
 
+os.remove(tarball_fn)
diff --git a/scripts/retrieve_natura_raster.py b/scripts/retrieve_natura_raster.py
index 98c1ae37..fd0f9332 100644
--- a/scripts/retrieve_natura_raster.py
+++ b/scripts/retrieve_natura_raster.py
@@ -1,10 +1,4 @@
-#!/usr/bin/env python3
-# -*- coding: utf-8 -*-
-"""
-Created on Mon Nov  4 18:37:11 2019
-
-@author: fabian
-"""
+## Copyright 2019 Fabian Hofmann (FIAS)
 
 import logging, os
 from _helpers import progress_retrieve
@@ -15,7 +9,6 @@ d = './resources'
 if not os.path.exists(d):
     os.makedirs(d)
 
-url = "https://zenodo.org/record/3518215/files/natura.tiff"
-file = "resources/natura.tiff"
-progress_retrieve(url, file)
-
+progress_retrieve("https://zenodo.org/record/3518215/files/natura.tiff",
+                  "resources/natura.tiff")
+                  
\ No newline at end of file