style: standardize string quotes and formatting across multiple modules

Author: pwwang

playground/module_all_calls.py

@@ -1,12 +1,15 @@
 import sys
 from varname import varname
 
+
 def func():
     # all calls from this module will be ignored
     return varname(ignore=sys.modules[__name__])
 
+
 def func2():
     return func()
 
+
 def func3():
     return func2()

playground/module_dual_qualnames.py

@@ -1,15 +1,19 @@
 import sys
 from varname import varname
 
+
 def func():
     # ignore all calls named _func*
-    return varname(ignore=(sys.modules[__name__], 'func'))
+    return varname(ignore=(sys.modules[__name__], "func"))
+
 
 # func2.__qualname__ == func.__qualname__ == 'func'
 func2 = func
 
+
 def func():
     return func2()
 
+
 def func3():
     return func()

playground/module_glob_qualname.py

@@ -1,12 +1,15 @@
 import sys
 from varname import varname
 
+
 def _func():
     # ignore all calls named _func*
-    return varname(ignore=(sys.modules[__name__], '_func*'))
+    return varname(ignore=(sys.modules[__name__], "_func*"))
+
 
 def _func2():
     return _func()
 
+
 def func3():
     return _func2()

tests/named_expr.py

@@ -2,7 +2,9 @@
 
 from varname import varname
 
+
 def function():
     return varname()
 
+
 a = [b := function(), c := function()]

varname/utils.py

@@ -271,7 +271,7 @@ def node_name(
         )
     if isinstance(node, ast.BoolOp):
         return f" {OP2SYMBOL[type(node.op)]} ".join(
-            node_name(value) for value in node.values
+            str(node_name(value)) for value in node.values
         )
     if isinstance(node, ast.Compare):
         # When the node is identified by executing, len(ops) is always 1.