Class InteractiveInterpreter

Known Subclasses:

InteractiveConsole

Base class for InteractiveConsole.

This class deals with parsing and interpreter state (the user's
namespace); it doesn't deal with input buffering or prompting or
input file naming (the filename is always passed in explicitly).

Constructor.

The optional 'locals' argument specifies the dictionary in
which code will be executed; it defaults to a newly created
dictionary with key "__name__" set to "__console__" and key
"__doc__" set to None.

Execute a code object.

When an exception occurs, self.showtraceback() is called to
display a traceback.  All exceptions are caught except
SystemExit, which is reraised.

A note about KeyboardInterrupt: this exception may occur
elsewhere in this code, and may not always be caught.  The
caller should be prepared to deal with it.

Compile and run some source in the interpreter.

Arguments are as for compile_command().

One several things can happen:

1) The input is incorrect; compile_command() raised an
exception (SyntaxError or OverflowError).  A syntax traceback
will be printed by calling the showsyntaxerror() method.

2) The input is incomplete, and more input is required;
compile_command() returned None.  Nothing happens.

3) The input is complete; compile_command() returned a code
object.  The code is executed by calling self.runcode() (which
also handles run-time exceptions, except for SystemExit).

The return value is True in case 2, False in the other cases (unless
an exception is raised).  The return value can be used to
decide whether to use sys.ps1 or sys.ps2 to prompt the next
line.

Display the syntax error that just occurred.

This doesn't display a stack trace because there isn't one.

If a filename is given, it is stuffed in the exception instead
of what was there before (because Python's parser always uses
"<string>" when reading from a string).

The output is written by self.write(), below.

Display the exception that just occurred.

We remove the first stack item because it is our own code.

The output is written by self.write(), below.

Write a string.

The base implementation writes to sys.stderr; a subclass may
replace this with a different implementation.