diff --git a/log_helper/config.py b/log_helper/config.py
index ed2dd8a..d6aa79d 100644
--- a/log_helper/config.py
+++ b/log_helper/config.py
@@ -1,8 +1,8 @@
 # Path to directory with logs (e.x. pod-logs)
-LOG_DIR = '/home/roman/Downloads/Test_logs/pod-logs'
+LOG_DIR = "/home/roman/Downloads/Test_logs/pod-logs"
 
 # Path to machine-readable YAML file, generated by report_parcer tool
-TEMPEST_REPORT_YAML = '/home/roman/Downloads/Test_logs/tempest_new.yaml'
+TEMPEST_REPORT_YAML = "/home/roman/Downloads/Test_logs/tempest_new.yaml"
 
 # Path to directory with results of log_helper execution
-RESULTS_DIR = '/home/roman/Downloads/Test_logs/log_helper_result'
+RESULTS_DIR = "/home/roman/Downloads/Test_logs/log_helper_result"
diff --git a/log_helper/log_helper.py b/log_helper/log_helper.py
index 48190c2..8e47a9a 100755
--- a/log_helper/log_helper.py
+++ b/log_helper/log_helper.py
@@ -1,88 +1,123 @@
 #!/usr/bin/env python3
 
+import os
 import subprocess
 import sys
-import os
-import yaml
 from os import path
-import config
 
+import config
+import yaml
 
 param_is_yaml = False
 
 if len(sys.argv) == 1:
     param_is_yaml = path.isfile(config.TEMPEST_REPORT_YAML)
     if param_is_yaml is False:
-        print('TEMPEST_REPORT_YAML config parameter is not a file')
-        raise Exception('TEMPEST_REPORT_YAML config parameter is not a file')
+        print("TEMPEST_REPORT_YAML config parameter is not a file")
+        raise Exception("TEMPEST_REPORT_YAML config parameter is not a file")
 
 
 def log_gather(resource_id, sub_resource, log_level=None):
-    """ Get all log lines related to resource-id
-       :param resource_id: ID resource, e.g. request-id, server-id
-       :param sub_resource: name of sub_resource log file, e.g subnet.log for neutron resource
-       :param log_level: substring for resource_id log: e.g. get only ERROR log level messages, optional
-       """
+    """Get all log lines related to resource-id
+    :param resource_id: ID resource, e.g. request-id, server-id
+    :param sub_resource: name of sub_resource log file,
+    e.g subnet.log for neutron resource
+    :param log_level: substring for resource_id log: e.g. get only
+    ERROR log level messages, optional
+    """
     try:
         directory = os.walk(config.LOG_DIR)
     except IndexError:
-        print('Parameter <LOG_DIR> is not provided')
-        raise ValueError('Parameter <LOG_DIR> is not provided')
+        print("Parameter <LOG_DIR> is not provided")
+        raise ValueError("Parameter <LOG_DIR> is not provided")
 
     if param_is_yaml:
         for dirs in directory:
-            run_cmd = f"grep -a {resource_id} {dirs[0]}/* >> {config.RESULTS_DIR}/{sub_resource}"
+            run_cmd = (
+                f"grep -a {resource_id} {dirs[0]}/* >> "
+                f"{config.RESULTS_DIR}/{sub_resource}"
+            )
             subprocess.run(run_cmd, shell=True)
 
     else:
         for dirs in directory:
             if log_level:
-                run_cmd = f"grep -lE '{resource_id}.*{log_level}|{log_level}.*{resource_id}' {dirs[0]}/* >> '{config.RESULTS_DIR}/tmp.log'"
+                run_cmd = (
+                    f"grep -lE '{resource_id}.*{log_level}|{log_level}"
+                    f".*{resource_id}' {dirs[0]}/* >> "
+                    f"'{config.RESULTS_DIR}/tmp.log'"
+                )
             else:
-                run_cmd = f"grep -l {resource_id} {dirs[0]}/* >> '{config.RESULTS_DIR}/tmp.log'"
+                run_cmd = (
+                    f"grep -l {resource_id} {dirs[0]}/* >> "
+                    f"'{config.RESULTS_DIR}/tmp.log'"
+                )
             subprocess.run(run_cmd, shell=True)
 
-        with open(config.RESULTS_DIR + '/tmp.log') as f:
+        with open(f"{config.RESULTS_DIR}/tmp.log") as f:
             files = f.readlines()
 
         for file in files:
             subd = file.split("/")
-            log_dir = subd[-4] + "." + subd[-3] + "." + subd[-2]
-            log_name = subd[-1].replace('\n', '')
-            os.makedirs(os.path.join(config.RESULTS_DIR, sys.argv[1], log_dir), exist_ok=True)
-            path = os.path.join(config.RESULTS_DIR, sys.argv[1], log_dir, log_name)
+            log_dir = f"{subd[-4]}.{subd[-3]}.{subd[-2]}"
+            log_name = subd[-1].replace("\n", "")
+            os.makedirs(
+                os.path.join(config.RESULTS_DIR, sys.argv[1], log_dir),
+                exist_ok=True,
+            )
+            path = os.path.join(
+                config.RESULTS_DIR, sys.argv[1], log_dir, log_name
+            )
             if log_level:
-                run_cmd = f"grep -aE '{resource_id}.*{log_level}|{log_level}.*{resource_id}' {file} >> {path}"
+                run_cmd = (
+                    f"grep -aE '{resource_id}.*{log_level}|{log_level}"
+                    f".*{resource_id}' {file} >> {path}"
+                )
             else:
                 run_cmd = f"grep -a {resource_id} {file} >> {path}"
-            subprocess.run(run_cmd.replace('\n', ''), shell=True)
+            subprocess.run(run_cmd.replace("\n", ""), shell=True)
 
-        os.remove(config.RESULTS_DIR + '/tmp.log')
+        os.remove(f"{config.RESULTS_DIR}/tmp.log")
 
 
 if param_is_yaml:
-    print('Find all the failed tempest tests from YAML file')
+    print("Find all the failed tempest tests from YAML file")
     with open(config.TEMPEST_REPORT_YAML) as f:
         test_resources = yaml.safe_load(f)
 
     for test in test_resources.items():
         # Find all the failed tempest tests from YAML file and gather logs for
         # related resources in corresponded folders
-        if test[1]['status'] == 'failure':
-            print('Collecting logs for ' + test[0])
-            os.makedirs(os.path.join(config.RESULTS_DIR, test[0]), exist_ok=True)
-            for resource in test[1]['resources']:
-                os.makedirs(os.path.join(config.RESULTS_DIR, test[0], resource), exist_ok=True)
-                for sub_resource in test[1]['resources'][resource]:
-                    log_gather(list(test[1]['resources'][resource][sub_resource])[0],
-                               os.path.join(test[0], resource, sub_resource + '.' + 'log'))
+        if test[1]["status"] == "failure":
+            print(f"Collecting logs for {test[0]}")
+            os.makedirs(
+                os.path.join(config.RESULTS_DIR, test[0]), exist_ok=True
+            )
+            for resource in test[1]["resources"]:
+                os.makedirs(
+                    os.path.join(config.RESULTS_DIR, test[0], resource),
+                    exist_ok=True,
+                )
+                for sub_resource in test[1]["resources"][resource]:
+                    log_gather(
+                        list(test[1]["resources"][resource][sub_resource])[0],
+                        os.path.join(
+                            test[0], resource, sub_resource + "." + "log"
+                        ),
+                    )
 
 else:
-    print('Find all the related log for one specific test or id with error')
+    print("Find all the related log for one specific test or id with error")
     os.makedirs(os.path.join(config.RESULTS_DIR, sys.argv[1]), exist_ok=True)
     if len(sys.argv) == 3:
-        log_gather(sys.argv[1], os.path.join(sys.argv[1], 'test' + '.' + 'log'), log_level=sys.argv[2])
+        log_gather(
+            sys.argv[1],
+            os.path.join(sys.argv[1], "test" + "." + "log"),
+            log_level=sys.argv[2],
+        )
     else:
-        log_gather(sys.argv[1], os.path.join(sys.argv[1], 'test' + '.' + 'log'))
+        log_gather(
+            sys.argv[1], os.path.join(sys.argv[1], "test" + "." + "log")
+        )
 
-print('The logger is finished')
+print("The logger is finished")
diff --git a/log_helper/setup.py b/log_helper/setup.py
index 5e73800..e7788a4 100644
--- a/log_helper/setup.py
+++ b/log_helper/setup.py
@@ -1,13 +1,13 @@
 from distutils.core import setup
 
 setup(
-    name='log_helper',
-    version='0.2',
+    name="log_helper",
+    version="0.2",
     py_modules=["log_helper", "config"],
-    install_requires=['pyyaml'],
-    python_requires='>=3.6',
-    author='Roman Bubyr',
-    author_email='rbubyr@gmail.com',
-    description='Openstack log helper tool',
-    scripts=['log_helper.py'],
+    install_requires=["pyyaml"],
+    python_requires=">=3.6",
+    author="Roman Bubyr",
+    author_email="rbubyr@gmail.com",
+    description="Openstack log helper tool",
+    scripts=["log_helper.py"],
 )