refactor component (#5)

* test: fix wrong name for test_get_children

* refactor: change .get() for direct get value by dict key

* refactor: fix trailing commas

* ci: ignore some flake8 cheking for easy easy code reading

This change is intended to make it easier for those who are completely beginners in programming to understand the code

* docs: fix README.md regardnig doctest errors

Co-authored-by: Sergey Karpuk <[email protected]>

README.md

@@ -11,6 +11,7 @@ pip install hexlet-immutable-fs-trees
 ## Usage example
 
 ```python
+
 >>> import hexlet.fs as fs
 >>> fs.is_file(fs.mkfile('config'))
 True

src/hexlet/fs/__init__.py

@@ -11,7 +11,7 @@ def mkfile(name, meta={}):
     return {
         'name': name,
         'meta': meta,
-        'type': 'file'
+        'type': 'file',
     }
 
 
@@ -21,33 +21,33 @@ def mkdir(name, children=[], meta={}):
         'name': name,
         'children': children,
         'meta': meta,
-        'type': 'directory'
+        'type': 'directory',
     }
 
 
 def is_directory(node):
     """Check is node a directory."""
-    return node.get('type') == 'directory'
+    return node['type'] == 'directory'
 
 
 def is_file(node):
     """Check is node a file."""
-    return node.get('type') == 'file'
+    return node['type'] == 'file'
 
 
 def get_children(directory):
     """Return children of node."""
-    return directory.get('children')
+    return directory.get('children', [])
 
 
 def get_meta(node):
     """Return meta of node."""
-    return node.get('meta')
+    return node['meta']
 
 
 def get_name(node):
     """Return name of node."""
-    return node.get('name')
+    return node['name']
 
 
 def flatten(tree):

test/test_fs.py

@@ -22,17 +22,18 @@ def test_build():
                 'children': [],
                 'meta': {},
                 'name': 'etc',
-                'type': 'directory'
+                'type': 'directory',
             },
             {
                 'children': [],
                 'meta': {},
                 'name': 'usr',
-                'type': 'directory'},
+                'type': 'directory',
+            },
             {
                 'meta': {},
                 'name': 'robots.txt',
-                'type': 'file'
+                'type': 'file',
             },
         ],
         'meta': {},
@@ -56,7 +57,7 @@ def test_get_meta2():
     assert fs.get_meta(file).get('owner') == 'root'
 
 
-def test_get_meta3():
+def test_get_children():
     file = fs.mkfile('robots.txt')
     dir = fs.mkdir('/')
     tree = fs.mkdir('/', [