How to create a symbol table in python
Source code: Lib/symtable.py Show Symbol tables are generated by the compiler from AST just before bytecode is generated. The symbol table is responsible for calculating the scope of every identifier in the code.
Generating Symbol Tables¶symtable. symtable (code, filename, compile_type)¶Return the toplevel Examining Symbol Tables¶classsymtable. SymbolTable ¶A namespace table for a block. The constructor is not public. get_type ()¶
Return the type of the symbol table. Possible values are 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 get_lineno ()¶Return the number of the first line in the block this table represents. is_optimized ()¶Return is_nested ()¶Return has_children ()¶Return get_identifiers ()¶Return a view object containing the names of symbols in the table. See the documentation of view objects. lookup (name)¶Lookup name in the table and return a get_symbols ()¶Return a list of get_children ()¶Return a list of the nested symbol tables. classsymtable. Function ¶A
namespace for a function or method. This class inherits 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_nonlocals ()¶Return a tuple containing names of nonlocals in this function. get_frees ()¶Return a tuple containing names of free variables in this function. classsymtable. Class ¶A
namespace of a class. This class inherits get_methods ()¶Return a tuple containing the names of methods declared in the class. classsymtable. Symbol ¶An entry in a get_name ()¶Return the symbol’s name. is_referenced ()¶Return is_imported ()¶Return is_parameter ()¶Return is_global ()¶Return
is_nonlocal ()¶Return is_declared_global ()¶Return is_local ()¶Return is_annotated ()¶Return New in version 3.6. is_free ()¶Return is_assigned ()¶Return is_namespace ()¶Return If the name is used as the target of a function or class statement, this will be true. For example: >>> 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 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, What is a symbol table in Python?Symbol tables are generated by the compiler from AST just before bytecode is generated. The symbol table is responsible for calculating the scope of every identifier in the code. symtable provides an interface to examine these tables.
How do you implement a symbol table?The symbol table can be implemented in the unordered list if the compiler is used to handle the small amount of data.. Linear (sorted or unsorted) list.. Hash table.. Binary search tree.. What is symbol table give an example?Symbol Table is an important data structure created and maintained by the compiler in order to keep track of semantics of variables i.e. it stores information about the scope and binding information about names, information about instances of various entities such as variable and function names, classes, objects, etc.
What is a symbol table programming?A symbol table is a data type that we use to associate values with keys. Clients can store (put) an entry into the symbol table by specifying a key–value pair and then can retrieve (get) the value corresponding to a particular key.
|