upstream/ipython Files · IPython/core/tests/test_formatters.py

pythonw in py3k sets std{in,out,err} to None...

pythonw in py3k sets std{in,out,err} to None The print statement works without error, even though the stdio file objects are instances of None. Since they are instances of None, however, the encoding attribute will not exist, so protect blind attribute access of std{in,out,err} by using a new function, get_stream_enc.

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             test_formatters.py
        
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        Robert Kern
    
ENH: Implement and test the default pretty formatter.

              r3209
            
      """Tests for the Formatters.

      """

        MinRK
    
add `float_precision` trait to PlainTextFormatter...

              r3350
            
      from math import pi

      try:

          import numpy

      except:

          numpy = None

        Robert Kern
    
ENH: Implement and test the default pretty formatter.

              r3209
            
      import nose.tools as nt

        MinRK
    
add `float_precision` trait to PlainTextFormatter...

              r3350
            
      from IPython.core.formatters import FormatterABC, PlainTextFormatter

        Robert Kern
    
BUG: Fix pretty-printing for overzealous objects that will return something non-callable for any requested attribute (thus confusing hasattr).

              r6268
            
      from IPython.lib import pretty

        Robert Kern
    
ENH: Implement and test the default pretty formatter.

              r3209
            
      class A(object):

          def __repr__(self):

              return 'A()'

      class B(A):

          def __repr__(self):

              return 'B()'

        Robert Kern
    
BUG: Fix pretty-printing for overzealous objects that will return something non-callable for any requested attribute (thus confusing hasattr).

              r6268
            
      class BadPretty(object):

          _repr_pretty_ = None

      class GoodPretty(object):

          def _repr_pretty_(self, pp, cycle):

              pp.text('foo')

          def __repr__(self):

              return 'GoodPretty()'

        Robert Kern
    
ENH: Implement and test the default pretty formatter.

              r3209
            
      def foo_printer(obj, pp, cycle):

          pp.text('foo')

      def test_pretty():

        MinRK
    
add `float_precision` trait to PlainTextFormatter...

              r3350
            
          f = PlainTextFormatter()

        Robert Kern
    
ENH: Implement and test the default pretty formatter.

              r3209
            
          f.for_type(A, foo_printer)

          nt.assert_equals(f(A()), 'foo')

          nt.assert_equals(f(B()), 'foo')

        Robert Kern
    
BUG: Fix pretty-printing for overzealous objects that will return something non-callable for any requested attribute (thus confusing hasattr).

              r6268
            
          nt.assert_equals(f(GoodPretty()), 'foo')

          # Just don't raise an exception for the following:

          f(BadPretty())

        Robert Kern
    
ENH: Implement and test the default pretty formatter.

              r3209
            
          f.pprint = False

          nt.assert_equals(f(A()), 'A()')

          nt.assert_equals(f(B()), 'B()')

        Robert Kern
    
BUG: Fix pretty-printing for overzealous objects that will return something non-callable for any requested attribute (thus confusing hasattr).

              r6268
            
          nt.assert_equals(f(GoodPretty()), 'GoodPretty()')

        Robert Kern
    
ENH: Implement and test the default pretty formatter.

              r3209
            
      def test_deferred():

        MinRK
    
add `float_precision` trait to PlainTextFormatter...

              r3350
            
          f = PlainTextFormatter()

      def test_precision():

          """test various values for float_precision."""

          f = PlainTextFormatter()

          nt.assert_equals(f(pi), repr(pi))

          f.float_precision = 0

          if numpy:

              po = numpy.get_printoptions()

              nt.assert_equals(po['precision'], 0)

          nt.assert_equals(f(pi), '3')

          f.float_precision = 2

          if numpy:

              po = numpy.get_printoptions()

              nt.assert_equals(po['precision'], 2)

          nt.assert_equals(f(pi), '3.14')

          f.float_precision = '%g'

          if numpy:

              po = numpy.get_printoptions()

              nt.assert_equals(po['precision'], 2)

          nt.assert_equals(f(pi), '3.14159')

          f.float_precision = '%e'

          nt.assert_equals(f(pi), '3.141593e+00')

          f.float_precision = ''

          if numpy:

              po = numpy.get_printoptions()

              nt.assert_equals(po['precision'], 8)

          nt.assert_equals(f(pi), repr(pi))

      def test_bad_precision():

          """test various invalid values for float_precision."""

          f = PlainTextFormatter()

          def set_fp(p):

              f.float_precision=p

          nt.assert_raises(ValueError, set_fp, '%')

          nt.assert_raises(ValueError, set_fp, '%.3f%i')

          nt.assert_raises(ValueError, set_fp, 'foo')

          nt.assert_raises(ValueError, set_fp, -1)

        Robert Kern
    
ENH: Implement and test the default pretty formatter.

              r3209

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Robert Kern ENH: Implement and test the default pretty formatter.	r3209	"""Tests for the Formatters.
		"""

MinRK add `float_precision` trait to PlainTextFormatter...	r3350	from math import pi

		try:
		import numpy
		except:
		numpy = None
Robert Kern ENH: Implement and test the default pretty formatter.	r3209	import nose.tools as nt

MinRK add `float_precision` trait to PlainTextFormatter...	r3350	from IPython.core.formatters import FormatterABC, PlainTextFormatter
Robert Kern BUG: Fix pretty-printing for overzealous objects that will return something non-callable for any requested attribute (thus confusing hasattr).	r6268	from IPython.lib import pretty
Robert Kern ENH: Implement and test the default pretty formatter.	r3209
		class A(object):
		def __repr__(self):
		return 'A()'

		class B(A):
		def __repr__(self):
		return 'B()'

Robert Kern BUG: Fix pretty-printing for overzealous objects that will return something non-callable for any requested attribute (thus confusing hasattr).	r6268	class BadPretty(object):
		_repr_pretty_ = None

		class GoodPretty(object):
		def _repr_pretty_(self, pp, cycle):
		pp.text('foo')

		def __repr__(self):
		return 'GoodPretty()'

Robert Kern ENH: Implement and test the default pretty formatter.	r3209	def foo_printer(obj, pp, cycle):
		pp.text('foo')

		def test_pretty():
MinRK add `float_precision` trait to PlainTextFormatter...	r3350	f = PlainTextFormatter()
Robert Kern ENH: Implement and test the default pretty formatter.	r3209	f.for_type(A, foo_printer)
		nt.assert_equals(f(A()), 'foo')
		nt.assert_equals(f(B()), 'foo')
Robert Kern BUG: Fix pretty-printing for overzealous objects that will return something non-callable for any requested attribute (thus confusing hasattr).	r6268	nt.assert_equals(f(GoodPretty()), 'foo')
		# Just don't raise an exception for the following:
		f(BadPretty())

Robert Kern ENH: Implement and test the default pretty formatter.	r3209	f.pprint = False
		nt.assert_equals(f(A()), 'A()')
		nt.assert_equals(f(B()), 'B()')
Robert Kern BUG: Fix pretty-printing for overzealous objects that will return something non-callable for any requested attribute (thus confusing hasattr).	r6268	nt.assert_equals(f(GoodPretty()), 'GoodPretty()')

Robert Kern ENH: Implement and test the default pretty formatter.	r3209
		def test_deferred():
MinRK add `float_precision` trait to PlainTextFormatter...	r3350	f = PlainTextFormatter()

		def test_precision():
		"""test various values for float_precision."""
		f = PlainTextFormatter()
		nt.assert_equals(f(pi), repr(pi))
		f.float_precision = 0
		if numpy:
		po = numpy.get_printoptions()
		nt.assert_equals(po['precision'], 0)
		nt.assert_equals(f(pi), '3')
		f.float_precision = 2
		if numpy:
		po = numpy.get_printoptions()
		nt.assert_equals(po['precision'], 2)
		nt.assert_equals(f(pi), '3.14')
		f.float_precision = '%g'
		if numpy:
		po = numpy.get_printoptions()
		nt.assert_equals(po['precision'], 2)
		nt.assert_equals(f(pi), '3.14159')
		f.float_precision = '%e'
		nt.assert_equals(f(pi), '3.141593e+00')
		f.float_precision = ''
		if numpy:
		po = numpy.get_printoptions()
		nt.assert_equals(po['precision'], 8)
		nt.assert_equals(f(pi), repr(pi))

		def test_bad_precision():
		"""test various invalid values for float_precision."""
		f = PlainTextFormatter()
		def set_fp(p):
		f.float_precision=p
		nt.assert_raises(ValueError, set_fp, '%')
		nt.assert_raises(ValueError, set_fp, '%.3f%i')
		nt.assert_raises(ValueError, set_fp, 'foo')
		nt.assert_raises(ValueError, set_fp, -1)

Robert Kern ENH: Implement and test the default pretty formatter.	r3209