diff --git a/.coveragerc b/.coveragerc
new file mode 100644
index 000000000..07491451b
--- /dev/null
+++ b/.coveragerc
@@ -0,0 +1,11 @@
+[run]
+parallel = True
+source = pydatastructs
+omit =
+    */tests/*
+
+[report]
+exclude_lines =
+    pragma: no cover
+
+    raise NotImplementedError
diff --git a/.gitignore b/.gitignore
index 917ba6634..52b147513 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,12 +1,60 @@
-*.swp
-*.pyc
-__pycache__/
-*.pyo
-*.vs
-.vs/
-.vscode/
-.pytest_cache/
+# Compiled source #
+###################
+*.com
+*.class
+*.dll
+*.exe
+*.o
+*.so
+*.gch
+
+# Packages #
+############
+# it's better to unpack these files and commit the raw source
+# git has its own built in compression methods
+*.7z
+*.dmg
+*.gz
+*.iso
+*.jar
+*.rar
+*.tar
+*.zip
+
+# Logs and databases #
+######################
+*.log
+*.sql
+*.sqlite
+
+# OS generated files #
+######################
+.DS_Store
+.DS_Store?
+._*
+.Spotlight-V100
+.Trashes
+ehthumbs.db
+Thumbs.db
 pre_commit.ps1
 htmlcov
 *coverage*
 *.egg-info/
+
+# Python Files #
+################
+*.pyc
+*.pyo
+*~
+__pycache__/
+.pytest_cache/
+
+# Backup Files #
+################
+*.bak
+*.swp
+
+# Editor Files #
+################
+.vscode/
+.vs/
diff --git a/coveragerc_travis b/coveragerc_travis
deleted file mode 100644
index cdbc4d842..000000000
--- a/coveragerc_travis
+++ /dev/null
@@ -1,5 +0,0 @@
-[run]
-parallel = True
-source = pydatastructs
-omit =
-    */tests/*
diff --git a/pydatastructs/graphs/__init__.py b/pydatastructs/graphs/__init__.py
index a484339a9..423345946 100644
--- a/pydatastructs/graphs/__init__.py
+++ b/pydatastructs/graphs/__init__.py
@@ -5,9 +5,3 @@
     Graph
 )
 __all__.extend(graph.__all__)
-
-from . import adjacency_list
-from .adjacency_list import (
-    AdjacencyList
-)
-__all__.extend(adjacency_list.__all__)