code linted using flake8

kaliappan01 · kaliappan01 · commit d953dc54fbb7 · 2021-10-03T01:20:32.000+05:30
diff --git a/markdown_viewer/requirements.txt b/markdown_viewer/requirements.txt
@@ -1,8 +1,12 @@
 certifi==2021.5.30
 charset-normalizer==2.0.6
+flake8==3.9.2
 idna==3.2
 markdown2==2.4.1
+mccabe==0.6.1
 Pillow==8.3.2
+pycodestyle==2.7.0
+pyflakes==2.3.1
 requests==2.26.0
 tkhtmlview==0.1.0.post1
 urllib3==1.26.7
