bpo-41224: Document is_annotated() in symtable module and update doc strings (GH-21369)

* Document is_annotate() and update doc strings

* Move quotes to the next line.

Co-authored-by: Pablo Galindo <Pablogsal@gmail.com>

Co-authored-by: Pablo Galindo <Pablogsal@gmail.com>

Doc/library/symtable.rst

@@ -156,6 +156,10 @@ Examining Symbol Tables
 
       Return ``True`` if the symbol is local to its block.
 
+    .. method:: is_annotated()
+
+      Return ``True`` if the symbol is annotated.
+
    .. method:: is_free()
 
       Return ``True`` if the symbol is referenced in its block, but not assigned

Lib/symtable.py

@@ -10,6 +10,11 @@ import weakref
 __all__ = ["symtable", "SymbolTable", "Class", "Function", "Symbol"]
 
 def symtable(code, filename, compile_type):
+    """ Return the toplevel *SymbolTable* for the source code.
+
+    *filename* is the name of the file with the code
+    and *compile_type* is the *compile()* mode argument.
+    """
     top = _symtable.symtable(code, filename, compile_type)
     return _newSymbolTable(top, filename)
 
@@ -55,6 +60,11 @@ class SymbolTable(object):
                                                             self._filename)
 
     def get_type(self):
+        """Return the type of the symbol table.
+
+        The values retuned are 'class', 'module' and
+        'function'.
+        """
         if self._table.type == _symtable.TYPE_MODULE:
             return "module"
         if self._table.type == _symtable.TYPE_FUNCTION:
@@ -65,27 +75,51 @@ class SymbolTable(object):
                "unexpected type: {0}".format(self._table.type)
 
     def get_id(self):
+        """Return an identifier for the table.
+        """
         return self._table.id
 
     def get_name(self):
+        """Return the table's name.
+
+        This corresponds to the name of the class, function
+        or 'top' if the table is for a class, function or
+        global respectively.
+        """
         return self._table.name
 
     def get_lineno(self):
+        """Return the number of the first line in the
+        block for the table.
+        """
         return self._table.lineno
 
     def is_optimized(self):
+        """Return *True* if the locals in the table
+        are optimizable.
+        """
         return bool(self._table.type == _symtable.TYPE_FUNCTION)
 
     def is_nested(self):
+        """Return *True* if the block is a nested class
+        or function."""
         return bool(self._table.nested)
 
     def has_children(self):
+        """Return *True* if the block has nested namespaces.
+        """
         return bool(self._table.children)
 
     def get_identifiers(self):
+        """Return a list of names of symbols in the table.
+        """
         return self._table.symbols.keys()
 
     def lookup(self, name):
+        """Lookup a *name* in the table.
+
+        Returns a *Symbol* instance.
+        """
         sym = self._symbols.get(name)
         if sym is None:
             flags = self._table.symbols[name]
@@ -94,6 +128,9 @@ class SymbolTable(object):
         return sym
 
     def get_symbols(self):
+        """Return a list of *Symbol* instances for
+        names in the table.
+        """
         return [self.lookup(ident) for ident in self.get_identifiers()]
 
     def __check_children(self, name):
@@ -102,6 +139,8 @@ class SymbolTable(object):
                 if st.name == name]
 
     def get_children(self):
+        """Return a list of the nested symbol tables.
+        """
         return [_newSymbolTable(st, self._filename)
                 for st in self._table.children]
 
@@ -120,11 +159,15 @@ class Function(SymbolTable):
                      if test_func(self._table.symbols[ident]))
 
     def get_parameters(self):
+        """Return a tuple of parameters to the function.
+        """
         if self.__params is None:
             self.__params = self.__idents_matching(lambda x:x & DEF_PARAM)
         return self.__params
 
     def get_locals(self):
+        """Return a tuple of locals in the function.
+        """
         if self.__locals is None:
             locs = (LOCAL, CELL)
             test = lambda x: ((x >> SCOPE_OFF) & SCOPE_MASK) in locs
@@ -132,6 +175,8 @@ class Function(SymbolTable):
         return self.__locals
 
     def get_globals(self):
+        """Return a tuple of globals in the function.
+        """
         if self.__globals is None:
             glob = (GLOBAL_IMPLICIT, GLOBAL_EXPLICIT)
             test = lambda x:((x >> SCOPE_OFF) & SCOPE_MASK) in glob
@@ -139,11 +184,15 @@ class Function(SymbolTable):
         return self.__globals
 
     def get_nonlocals(self):
+        """Return a tuple of nonlocals in the function.
+        """
         if self.__nonlocals is None:
             self.__nonlocals = self.__idents_matching(lambda x:x & DEF_NONLOCAL)
         return self.__nonlocals
 
     def get_frees(self):
+        """Return a tuple of free variables in the function.
+        """
         if self.__frees is None:
             is_free = lambda x:((x >> SCOPE_OFF) & SCOPE_MASK) == FREE
             self.__frees = self.__idents_matching(is_free)
@@ -155,6 +204,8 @@ class Class(SymbolTable):
     __methods = None
 
     def get_methods(self):
+        """Return a tuple of methods declared in the class.
+        """
         if self.__methods is None:
             d = {}
             for st in self._table.children:
@@ -175,40 +226,63 @@ class Symbol(object):
         return "<symbol {0!r}>".format(self.__name)
 
     def get_name(self):
+        """Return a name of a symbol.
+        """
         return self.__name
 
     def is_referenced(self):
+        """Return *True* if the symbol is used in
+        its block.
+        """
         return bool(self.__flags & _symtable.USE)
 
     def is_parameter(self):
+        """Return *True* if the symbol is a parameter.
+        """
         return bool(self.__flags & DEF_PARAM)
 
     def is_global(self):
+        """Return *True* if the sysmbol is global.
+        """
         return bool(self.__scope in (GLOBAL_IMPLICIT, GLOBAL_EXPLICIT))
 
     def is_nonlocal(self):
+        """Return *True* if the symbol is nonlocal."""
         return bool(self.__flags & DEF_NONLOCAL)
 
     def is_declared_global(self):
+        """Return *True* if the symbol is declared global
+        with a global statement."""
         return bool(self.__scope == GLOBAL_EXPLICIT)
 
     def is_local(self):
+        """Return *True* if the symbol is local.
+        """
         return bool(self.__scope in (LOCAL, CELL))
 
     def is_annotated(self):
+        """Return *True* if the symbol is annotated.
+        """
         return bool(self.__flags & DEF_ANNOT)
 
     def is_free(self):
+        """Return *True* if a referenced symbol is
+        not assigned to.
+        """
         return bool(self.__scope == FREE)
 
     def is_imported(self):
+        """Return *True* if the symbol is created from
+        an import statement.
+        """
         return bool(self.__flags & DEF_IMPORT)
 
     def is_assigned(self):
+        """Return *True* if a symbol is assigned to."""
         return bool(self.__flags & DEF_LOCAL)
 
     def is_namespace(self):
-        """Returns true if name binding introduces new namespace.
+        """Returns *True* if name binding introduces new namespace.
 
         If the name is used as the target of a function or class
         statement, this will be true.
@@ -225,7 +299,7 @@ class Symbol(object):
         return self.__namespaces
 
     def get_namespace(self):
-        """Returns the single namespace bound to this name.
+        """Return the single namespace bound to this name.
 
         Raises ValueError if the name is bound to multiple namespaces.
         """