Increased code coverage

.coveragerc

@@ -0,0 +1,11 @@
+[run]
+parallel = True
+source = pydatastructs
+omit =
+    */tests/*
+
+[report]
+exclude_lines =
+    pragma: no cover
+
+    raise NotImplementedError

.gitignore

@@ -1,12 +1,55 @@
-*.swp
+# 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
+
+# Python Files #
+################
 *.pyc
-__pycache__/
 *.pyo
-*.vs
-.vs/
+*~
+__pycache__/
+
+# Backup Files #
+################
+*.bak
+*.swp
+
+# Editor Files #
+################
 .vscode/
-.pytest_cache/
-pre_commit.ps1
-htmlcov
-*coverage*
-*.egg-info/
+.vs/

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__)