diff --git a/useful_scripts/conc_gzip_files.py b/useful_scripts/conc_gzip_files.py
new file mode 100644
index 0000000..340c68f
--- /dev/null
+++ b/useful_scripts/conc_gzip_files.py
@@ -0,0 +1,28 @@
+# Sebastian Raschka 03/2014
+
+import gzip
+import os
+
+def conc_gzip_files(in_dir, out_file, append=False):
+    """ Reads contents from gzipped ASCII or UTF-8 files, decodes them, and
+        appends the lines to one output file.
+
+    Keyword arguments:
+        in_dir (str): Path of the directory with the gzip-files
+        out_file (str): Path to the resulting file
+        append (bool): If true, it appends contents to an exisiting file,
+             else creates a new output file.
+
+    """
+    write_mode = 'w'
+    if append:
+        write_mode = 'a'
+    gzips = [os.path.join(in_dir, i) for i in os.listdir(in_dir) if i.endswith(i)]
+    with open(out_file, write_mode) as ofile:
+        for f in gzips:
+            with gzip.open(f, 'rb') as gzipf:
+                for line in gzipf:
+                    ofile.write(line.decode())
+
+if __name__ == '__main__':
+    conc_gzip_files('/home/usr/my_dir', '/home/usr/test.txt')