32.3. symtable — 访问编译器的符号表 ¶

32.3.1. 生成符号表 ¶

symtable. symtable ( code , filename , compile_type ) ¶

Return the toplevel SymbolTable for the Python source code . filename is the name of the file containing the code. compile_type is like the mode 自变量为 compile() .

32.3.2. 审查符号表 ¶

class symtable. SymbolTable ¶

A namespace table for a block. The constructor is not public.

get_type ( ) ¶

Return the type of the symbol table. Possible values are 'class' , 'module' ，和 'function' .

get_id ( ) ¶

Return the table’s identifier.

get_name ( ) ¶

Return the table’s name. This is the name of the class if the table is for a class, the name of the function if the table is for a function, or 'top' if the table is global ( get_type() 返回 'module' ).

get_lineno ( ) ¶

Return the number of the first line in the block this table represents.

is_optimized ( ) ¶

返回 True if the locals in this table can be optimized.

is_nested ( ) ¶

返回 True if the block is a nested class or function.

has_children ( ) ¶

返回 True if the block has nested namespaces within it. These can be obtained with get_children() .

has_exec ( ) ¶

返回 True if the block uses exec .

get_identifiers ( ) ¶

Return a list of names of symbols in this table.

lookup ( name ) ¶

Lookup name in the table and return a Symbol 实例。

get_symbols ( ) ¶

Return a list of Symbol instances for names in the table.

get_children ( ) ¶

Return a list of the nested symbol tables.

class symtable. Function ¶

A namespace for a function or method. This class inherits SymbolTable .

get_parameters ( ) ¶

Return a tuple containing names of parameters to this function.

get_locals ( ) ¶

Return a tuple containing names of locals in this function.

get_globals ( ) ¶

Return a tuple containing names of globals in this function.

get_frees ( ) ¶

Return a tuple containing names of free variables in this function.

class symtable. 类 ¶

A namespace of a class. This class inherits SymbolTable .

get_methods ( ) ¶

Return a tuple containing the names of methods declared in the class.

class symtable. Symbol ¶

An entry in a SymbolTable corresponding to an identifier in the source. The constructor is not public.

get_name ( ) ¶

Return the symbol’s name.

is_referenced ( ) ¶

返回 True if the symbol is used in its block.

is_imported ( ) ¶

返回 True if the symbol is created from an import statement.

is_parameter ( ) ¶

返回 True if the symbol is a parameter.

is_global ( ) ¶

返回 True if the symbol is global.

is_declared_global ( ) ¶

返回 True if the symbol is declared global with a global statement.

is_local ( ) ¶

返回 True if the symbol is local to its block.

is_free ( ) ¶

返回 True if the symbol is referenced in its block, but not assigned to.

is_assigned ( ) ¶

返回 True if the symbol is assigned to in its block.

is_namespace ( ) ¶

返回 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.

例如：

>>> table = symtable.symtable("def some_func(): pass", "string", "exec")
>>> table.lookup("some_func").is_namespace()
True
												

Note that a single name can be bound to multiple objects. If the result is True , the name may also be bound to other objects, like an int or list, that does not introduce a new namespace.

get_namespaces ( ) ¶

Return a list of namespaces bound to this name.

get_namespace ( ) ¶

Return the namespace bound to this name. If more than one namespace is bound, ValueError 被引发。