parameters: (varstr)
return_statement: return _is_valid_var.match(varstr)
docstring: Return if the specified string is a legitimate construction
      variable.
docstring_summary: Return if the specified string is a legitimate construction
      variable.
docstring_tokens: Return if the specified string is a legitimate construction variable .
function: def is_valid_construction_var(varstr):
      """Return if the specified string is a legitimate construction
      variable.
      """
      return _is_valid_var.match(varstr)
function_tokens: def is_valid_construction_var ( varstr ) : return _is_valid_var . match ( varstr )