Code snippets failing on the interpreter

[Gael Varoquaux]

In [1]: from IPython.kernel.core.interpreter import Interpreter

In [2]: i = Interpreter()

In [3]: i.execute('from textwrap import dedent')
Out[3]:
{'input': {'raw': 'from textwrap import dedent',
           'translated': 'from textwrap import dedent'},
 'number': 1}

In [4]: i.execute('dedent("""a\nb""")\n')
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)

/home/gvaroquaux/<ipython console> in <module>()

/home/gvaroquaux/dev/ipython/ipython-frontend/IPython/kernel/core/interpreter.pyc in execute_block(self, code)
    373 outflag = 1 # start by assuming error, success will reset it
    374 try:
--> 375 exec code in self.user_ns
    376 outflag = 0
    377 except SystemExit:

TypeError: exec: arg 1 must be a string, file, or code object

In [5]: i.execute('dedent(""" a\n b\n c""")\n')
---------------------------------------------------------------------------
IndentationError Traceback (most recent call last)

/home/gvaroquaux/<ipython console> in <module>()

/home/gvaroquaux/dev/ipython/ipython-frontend/IPython/kernel/core/interpreter.pyc in execute_python(self, python)
    352 for cmd in commands:
    353 try:
--> 354 code = self.command_compiler(cmd, self.filename, 'single')
    355 except (SyntaxError, OverflowError, ValueError), e:
    356 self.traceback_trap.args = sys.exc_info()

/usr/lib/python2.5/codeop.pyc in __call__(self, source, filename, symbol)
    164 - Raise SyntaxError, ValueError or OverflowError if the command is a
    165 syntax error (OverflowError and ValueError can be produced by
    166 malformed literals).
    167 """
--> 168 return _maybe_compile(self.compiler, source, filename, symbol)

/usr/lib/python2.5/codeop.pyc in _maybe_compile(compiler, source, filename, symbol)
     97 return code
     98 if not code1 and repr(err1) == repr(err2):
---> 99 raise SyntaxError, err1
    100
    101 def _compile(source, filename, symbol):

IndentationError: unexpected indent (<string>, line 1)

[Brian Granger (ellisonbg)]

This also shows up for the even simpler commands:

str("""a\nb""")

and:

str("a\nb")

I have added tests for these cases and comments in interpreter.py about what lines of code are causing these problem. The difficulty is that some of them look to be a bug in python itself.

[Brian Granger (ellisonbg)]

Thanks for Gael for fixing this!