[client] Sort imports with isort; add pre-commit hooks (#168)

* [client] Add black-compatible isort config
* https://pycqa.github.io/isort/
* https://black.readthedocs.io/en/stable/compatible_configs.html#isort
* [client] Sort all imports with isort
* [client] Add isort to pre-commit hooks

Author: djds

.isort.cfg

@@ -0,0 +1,7 @@
+[settings]
+multi_line_output = 3
+include_trailing_comma = True
+force_grid_wrap = 0
+use_parentheses = True
+ensure_newline_before_comments = True
+line_length = 88

.pre-commit-config.yaml

@@ -1,9 +1,14 @@
-repos:
--   repo: https://github.com/psf/black
-    rev: 20.8b1
-    hooks:
-    -   id: black
--   repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v3.3.0
-    hooks:
-    -   id: check-yaml
+---
+repos:
+  - repo: https://github.com/PyCQA/isort
+    rev: 5.8.0
+    hooks:
+      - id: isort
+  - repo: https://github.com/psf/black
+    rev: 20.8b1
+    hooks:
+      - id: black
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v3.3.0
+    hooks:
+      - id: check-yaml

examples/add_external_reference_to_report.py

@@ -1,6 +1,7 @@
 # coding: utf-8
 
 from dateutil.parser import parse
+
 from pycti import OpenCTIApiClient
 
 # Variables

examples/cmd_line_tag_latest_indicators_of_threat.py

@@ -2,6 +2,7 @@
 import argparse
 
 from dateutil.parser import parse
+
 from pycti import OpenCTIApiClient
 
 # Variables

examples/create_campaign_attributed-to_intrusion_set.py

@@ -1,6 +1,7 @@
 # coding: utf-8
 
 from dateutil.parser import parse
+
 from pycti import OpenCTIApiClient
 
 # Variables

examples/create_indicator_of_campaign.py

@@ -1,6 +1,7 @@
 # coding: utf-8
 
 from dateutil.parser import parse
+
 from pycti import OpenCTIApiClient
 
 # Variables

examples/create_intrusion_set.py

@@ -1,6 +1,7 @@
 # coding: utf-8
 
 import datetime
+
 from pycti import OpenCTIApiClient
 
 # Variables

examples/create_report_with_author.py

@@ -1,6 +1,7 @@
 # coding: utf-8
 
 from dateutil.parser import parse
+
 from pycti import OpenCTIApiClient
 
 # Variables

examples/export_incident_stix2.py

@@ -1,6 +1,7 @@
 # coding: utf-8
 
 import json
+
 from pycti import OpenCTIApiClient
 
 # Variables

examples/export_incidents_stix2.py

@@ -1,6 +1,7 @@
 # coding: utf-8
 
 import json
+
 from pycti import OpenCTIApiClient
 
 # Variables