diff --git a/cluster/__init__.py b/cluster/__init__.py
index bb8bc36..302f089 100644
--- a/cluster/__init__.py
+++ b/cluster/__init__.py
@@ -12,6 +12,7 @@ def detect_cluster_system():
 
     :return: string "SBE", "PBS" or "other"
     """
+
     try:
         which_output = check_output(["which", "sge_qmaster"], stderr=DEVNULL).decode("utf-8")
 
diff --git a/helper/pca_plot.py b/helper/pca_plot.py
index 3444afd..21d5a7e 100644
--- a/helper/pca_plot.py
+++ b/helper/pca_plot.py
@@ -16,6 +16,7 @@
 
 def run_pca(expression):
     # Load Expression data
+
     df = pd.read_table(expression, header=0, index_col=0)
     run_ids = list(df.columns.values)
     dataMatrix = np.transpose(np.array(df))