text: import numpy as np
  from numpy.testing import *
  import nose
  
  import locale
  import sys
  from StringIO import StringIO
  
  _REF = {np.inf: 'inf', -np.inf: '-inf', np.nan: 'nan'}
  
  
  def check_float_type(tp):
      for x in [0, 1,-1, 1e20] :
          assert_equal(str(tp(x)), str(float(x)),
                       err_msg='Failed str formatting for type %s' % tp)
  
      if tp(1e10).itemsize > 4:
          assert_equal(str(tp(1e10)), str(float('1e10')),
                       err_msg='Failed str formatting for type %s' % tp)
      else:
          if sys.platform == 'win32' and sys.version_info[0] <= 2 and \
             sys.version_info[1] <= 5:
              ref = '1e+010'
          else:
              ref = '1e+10'
          assert_equal(str(tp(1e10)), ref,
                       err_msg='Failed str formatting for type %s' % tp)
  
  #@dec.knownfailureif(True, "formatting tests are known to fail")
  def test_float_types():
      """ Check formatting.
  
          This is only for the str function, and only for simple types.
          The precision of np.float and np.longdouble aren't the same as the
          python float precision.
  
      """
      for t in [np.float32, np.double, np.longdouble] :
          yield check_float_type, t
  
  def check_nan_inf_float(tp):
      for x in [np.inf, -np.inf, np.nan]:
          assert_equal(str(tp(x)), _REF[x],
                       err_msg='Failed str formatting for type %s' % tp)
  
  #@dec.knownfailureif(True, "formatting tests are known to fail")
  def test_nan_inf_float():
      """ Check formatting of nan & inf.
  
          This is only for the str function, and only for simple types.
          The precision of np.float and np.longdouble aren't the same as the
          python float precision.
  
      """
      for t in [np.float32, np.double, np.longdouble] :
          yield check_nan_inf_float, t
  
  def check_complex_type(tp):
      for x in [0, 1,-1, 1e20] :
          assert_equal(str(tp(x)), str(complex(x)),
                       err_msg='Failed str formatting for type %s' % tp)
          assert_equal(str(tp(x*1j)), str(complex(x*1j)),
                       err_msg='Failed str formatting for type %s' % tp)
          assert_equal(str(tp(x + x*1j)), str(complex(x + x*1j)),
                       err_msg='Failed str formatting for type %s' % tp)
  
      if tp(1e10).itemsize > 8:
          assert_equal(str(tp(1e10)), str(complex(1e10)),
                       err_msg='Failed str formatting for type %s' % tp)
      else:
          if sys.platform == 'win32' and sys.version_info[0] <= 2 and \
             sys.version_info[1] <= 5:
              ref = '(1e+010+0j)'
          else:
              ref = '(1e+10+0j)'
          assert_equal(str(tp(1e10)), ref,
                       err_msg='Failed str formatting for type %s' % tp)
  
  #@dec.knownfailureif(True, "formatting tests are known to fail")
  def test_complex_types():
      """Check formatting of complex types.
  
          This is only for the str function, and only for simple types.
          The precision of np.float and np.longdouble aren't the same as the
          python float precision.
  
      """
      for t in [np.complex64, np.cdouble, np.clongdouble] :
          yield check_complex_type, t
  
  def test_complex_inf_nan():
      """Check inf/nan formatting of complex types."""
      if sys.version_info[0] >= 2 and sys.version_info[1] >= 6:
          TESTS = {
              complex(np.inf, 0): "(inf+0j)",
              complex(0, np.inf): "inf*j",
              complex(-np.inf, 0): "(-inf+0j)",
              complex(0, -np.inf): "-inf*j",
              complex(np.inf, 1): "(inf+1j)",
              complex(1, np.inf): "(1+inf*j)",
              complex(-np.inf, 1): "(-inf+1j)",
              complex(1, -np.inf): "(1-inf*j)",
              complex(np.nan, 0): "(nan+0j)",
              complex(0, np.nan): "nan*j",
              complex(-np.nan, 0): "(nan+0j)",
              complex(0, -np.nan): "nan*j",
              complex(np.nan, 1): "(nan+1j)",
              complex(1, np.nan): "(1+nan*j)",
              complex(-np.nan, 1): "(nan+1j)",
              complex(1, -np.nan): "(1+nan*j)",
          }
      else:
          TESTS = {
              complex(np.inf, 0): "(inf+0j)",
              complex(0, np.inf): "infj",
              complex(-np.inf, 0): "(-inf+0j)",
              complex(0, -np.inf): "-infj",
              complex(np.inf, 1): "(inf+1j)",
              complex(1, np.inf): "(1+infj)",
              complex(-np.inf, 1): "(-inf+1j)",
              complex(1, -np.inf): "(1-infj)",
              complex(np.nan, 0): "(nan+0j)",
              complex(0, np.nan): "nanj",
              complex(-np.nan, 0): "(nan+0j)",
              complex(0, -np.nan): "nanj",
              complex(np.nan, 1): "(nan+1j)",
              complex(1, np.nan): "(1+nanj)",
              complex(-np.nan, 1): "(nan+1j)",
              complex(1, -np.nan): "(1+nanj)",
          }
      for tp in [np.complex64, np.cdouble, np.clongdouble]:
          for c, s in TESTS.items():
              yield _check_complex_inf_nan, c, s, tp
  
  def _check_complex_inf_nan(c, s, dtype):
      assert_equal(str(dtype(c)), s)
  
  # print tests
  def _test_redirected_print(x, tp, ref=None):
      file = StringIO()
      file_tp = StringIO()
      stdout = sys.stdout
      try:
          sys.stdout = file_tp
          print tp(x)
          sys.stdout = file
          if ref:
              print ref
          else:
              print x
      finally:
          sys.stdout = stdout
  
      assert_equal(file.getvalue(), file_tp.getvalue(),
                   err_msg='print failed for type%s' % tp)
  
  def check_float_type_print(tp):
      for x in [0, 1,-1, 1e20]:
          _test_redirected_print(float(x), tp)
  
      for x in [np.inf, -np.inf, np.nan]:
          _test_redirected_print(float(x), tp, _REF[x])
  
      if tp(1e10).itemsize > 4:
          _test_redirected_print(float(1e10), tp)
      else:
          if sys.platform == 'win32' and sys.version_info[0] <= 2 and \
             sys.version_info[1] <= 5:
              ref = '1e+010'
          else:
              ref = '1e+10'
          _test_redirected_print(float(1e10), tp, ref)
  
  #@dec.knownfailureif(True, "formatting tests are known to fail")
  def check_complex_type_print(tp):
      # We do not create complex with inf/nan directly because the feature is
      # missing in python < 2.6
      for x in [0, 1, -1, 1e20]:
          _test_redirected_print(complex(x), tp)
  
      if tp(1e10).itemsize > 8:
          _test_redirected_print(complex(1e10), tp)
      else:
          if sys.platform == 'win32' and sys.version_info[0] <= 2 and \
             sys.version_info[1] <= 5:
              ref = '(1e+010+0j)'
          else:
              ref = '(1e+10+0j)'
          _test_redirected_print(complex(1e10), tp, ref)
  
      _test_redirected_print(complex(np.inf, 1), tp, '(inf+1j)')
      _test_redirected_print(complex(-np.inf, 1), tp, '(-inf+1j)')
      _test_redirected_print(complex(-np.nan, 1), tp, '(nan+1j)')
  
  def test_float_type_print():
      """Check formatting when using print """
      for t in [np.float32, np.double, np.longdouble] :
          yield check_float_type_print, t
  
  #@dec.knownfailureif(True, "formatting tests are known to fail")
  def test_complex_type_print():
      """Check formatting when using print """
      for t in [np.complex64, np.cdouble, np.clongdouble] :
          yield check_complex_type_print, t
  
  # Locale tests: scalar types formatting should be independent of the locale
  def in_foreign_locale(func):
      # XXX: How to query locale on a given system ?
  
      # French is one language where the decimal is ',' not '.', and should be
      # relatively common on many systems
      def wrapper(*args, **kwargs):
          curloc = locale.getlocale(locale.LC_NUMERIC)
          try:
              try:
                  if not sys.platform == 'win32':
                      locale.setlocale(locale.LC_NUMERIC, 'fr_FR')
                  else:
                      locale.setlocale(locale.LC_NUMERIC, 'FRENCH')
              except locale.Error:
                  raise nose.SkipTest("Skipping locale test, because "
                                      "French locale not found")
              return func(*args, **kwargs)
          finally:
              locale.setlocale(locale.LC_NUMERIC, locale=curloc)
      return nose.tools.make_decorator(func)(wrapper)
  
  #@dec.knownfailureif(True, "formatting tests are known to fail")
  @in_foreign_locale
  def test_locale_single():
      assert_equal(str(np.float32(1.2)), str(float(1.2)))
  
  #@dec.knownfailureif(True, "formatting tests are known to fail")
  @in_foreign_locale
  def test_locale_double():
      assert_equal(str(np.double(1.2)), str(float(1.2)))
  
  #@dec.knownfailureif(True, "formatting tests are known to fail")
  @in_foreign_locale
  def test_locale_longdouble():
      assert_equal(str(np.longdouble(1.2)), str(float(1.2)))
  
  if __name__ == "__main__":
      run_module_suite()
  