diff --git a/db.py b/db.py
index 79f1a27..bff424a 100644
--- a/db.py
+++ b/db.py
@@ -1,6 +1,7 @@
 #!/usr/bin/python3
 from sql30 import db
 
+
 class Database(db.Model):
     TABLE = 'database'
     DB_SCHEMA = {
@@ -16,4 +17,4 @@ class Database(db.Model):
             }
         ]
     }
-    VALIDATE_WRITE = True
\ No newline at end of file
+    VALIDATE_WRITE = True
diff --git a/perfd.py b/perfd.py
index 5941350..03dd9fa 100755
--- a/perfd.py
+++ b/perfd.py
@@ -4,20 +4,21 @@
 import subprocess
 import db
 
-temp_perf_file = tempfile.NamedTemporaryFile(delete= False) 
-#temp_perf_file.name
+temp_perf_file = tempfile.NamedTemporaryFile(delete=False)
+# temp_perf_file.name
 
-os.system("perf record -e cycles:u -j any,u -a -o  " + temp_perf_file.name + "  -- sleep 10")
-batcmd ="perf script -F ip,dso -f -i " + temp_perf_file.name
+os.system("perf record -e cycles:u -j any,u -a -o  " +
+          temp_perf_file.name + "  -- sleep 10")
+batcmd = "perf script -F ip,dso -f -i " + temp_perf_file.name
 
-result = subprocess.check_output(batcmd, shell=True, text =True)
+result = subprocess.check_output(batcmd, shell=True, text=True)
 lines = result.splitlines()
 samples_per_obj_file = dict()
 
 for line in lines:
     cols = line.split()
     name_parens = cols[1]
-    name = name_parens[1:-1] 
+    name = name_parens[1:-1]
 
     if name in samples_per_obj_file:
         samples_per_obj_file[name] += 1
@@ -26,8 +27,31 @@
 
 database = db.Database()
 database.table = 'database'
-for name in samples_per_obj_file:      
-    database.write(perf_name= temp_perf_file.name, name_obj_file= name, amount_of_samples= samples_per_obj_file[name])
+for name in samples_per_obj_file:
+    database.write(
+        perf_name=temp_perf_file.name,
+        name_obj_file=name,
+        amount_of_samples=samples_per_obj_file[name])
 
-database.commit() 
-print(database.read()) 
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+database.commit()
+print(database.read())
+
+#step4
+def prepare_fdata(objfile):
+    perf_file = database.read(name_obj_file=objfile)
+    print(perf_file)
+
+perf2bolt = "/path/to/perf2bolt objfile -p perf_file -o perf_file.fdata"
+merge_fdata = "/path/to/merge-fdata perf_file1.fdata perf_file2.fdata perf_file > tmp_fdata" 
+
+temp_fdata = tempfile.NamedTemporaryFile(delete=False)
+# temp_fdata.name
+
+tmp_fdata = "perf script -F ip,dso -f -i " + temp_fdata.name
+print(tmp_fdata)
+
+def prepare_fdata(tmp_fdata):
+    return tmp_fdata 
+
+tmp_fdata.commit()
+print(tmp_fdata.commit())
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