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

Backport PR : Adapt inline backend to changes in matplotlib...

Backport PR : Adapt inline backend to changes in matplotlib Matplotlib recently merged https://github.com/matplotlib/matplotlib/pull/1125 that makes it simpler to use objective oriented figure creation by automatically creating the right canvas for the backend. To solve that all backends must provide a backend_xxx.FigureCanvas. This is obviosly missing from the inline backend. The change is needed to make the inline backend work with mpl's 1.2.x branch which is due to released soon. Simply setting the default canvas equal to a Agg canvas appears to work for both svg and png figures but I'm not sure weather that is the right approach. Should the canvas depend on the figure format and provide a svg canvas for a svg figure? (Note that before this change to matplotlib the canvas from a plt.figure call seams to be a agg type in all cases) Edit: I made the pull request against 0.13.1 since it would be good to have this in the stable branch for when mpl is released. Just let me know and I can rebase it against master

Robert Kern - - Load All Authors

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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