test_format.py

try:
    from StringIO import StringIO
except:
    from io import StringIO

import os
import sys
import unittest

from numpy import nan
from numpy.random import randn
import numpy as np

from pandas import DataFrame, Series, Index
import pandas.core.format as fmt
import pandas.util.testing as tm
import pandas

_frame = DataFrame(tm.getSeriesData())

def curpath():
    pth, _ = os.path.split(os.path.abspath(__file__))
    return pth

class TestDataFrameFormatting(unittest.TestCase):

    def setUp(self):
        self.frame = _frame.copy()

    def test_repr_embedded_ndarray(self):
        arr = np.empty(10, dtype=[('err', object)])
        for i in range(len(arr)):
            arr['err'][i] = np.random.randn(i)

        df = DataFrame(arr)
        repr(df['err'])
        repr(df)
        df.to_string()

    def test_eng_float_formatter(self):
        self.frame.ix[5] = 0

        fmt.set_eng_float_format()
        result = repr(self.frame)

        fmt.set_eng_float_format(use_eng_prefix=True)
        repr(self.frame)

        fmt.set_eng_float_format(accuracy=0)
        repr(self.frame)

        fmt.reset_printoptions()

    def test_repr_tuples(self):
        buf = StringIO()

        df = DataFrame({'tups' : zip(range(10), range(10))})
        repr(df)
        df.to_string(col_space=10, buf=buf)

    def test_to_string_repr_unicode(self):
        buf = StringIO()

        unicode_values = [u'\u03c3'] * 10
        unicode_values = np.array(unicode_values, dtype=object)
        df = DataFrame({'unicode' : unicode_values})
        df.to_string(col_space=10, buf=buf)

        # it works!
        repr(df)

        idx = Index(['abc', u'\u03c3a', 'aegdvg'])
        ser = Series(np.random.randn(len(idx)), idx)
        rs = repr(ser).split('\n')
        line_len = len(rs[0])
        for line in rs[1:]:
            try:
                line = line.decode('utf-8')
            except:
                pass
            self.assert_(len(line) == line_len)

        # it works even if sys.stdin in None
        sys.stdin = None
        repr(df)
        sys.stdin = sys.__stdin__

    def test_to_string_unicode_columns(self):
        df = DataFrame({u'\u03c3' : np.arange(10.)})

        buf = StringIO()
        df.to_string(buf=buf)
        buf.getvalue()

        buf = StringIO()
        df.info(buf=buf)
        buf.getvalue()

        result = self.frame.to_string(force_unicode=True)
        self.assert_(isinstance(result, unicode))

    def test_to_string_unicode_two(self):
        dm = DataFrame({u'c/\u03c3': []})
        buf = StringIO()
        dm.to_string(buf)

    def test_to_string_unicode_three(self):
        dm = DataFrame(['\xc2'])
        buf = StringIO()
        dm.to_string(buf)

    def test_to_string_with_formatters(self):
        df = DataFrame({'int': [1, 2, 3],
                        'float': [1.0, 2.0, 3.0],
                        'object': [(1,2), True, False]},
                        columns=['int', 'float', 'object'])

        result = df.to_string(formatters={'int': lambda x: '0x%x' % x,
                                          'float': lambda x: '[% 4.1f]' % x,
                                          'object': lambda x: '-%s-' % str(x)})
        self.assertEqual(result, ('  int  float    object\n'
                                  '0 0x1 [ 1.0]  -(1, 2)-\n'
                                  '1 0x2 [ 2.0]    -True-\n'
                                  '2 0x3 [ 3.0]   -False-'))

    def test_to_string_with_formatters_unicode(self):
        df = DataFrame({u'c/\u03c3':[1,2,3]})
        result = df.to_string(formatters={u'c/\u03c3': lambda x: '%s' % x})
        self.assertEqual(result, (u'  c/\u03c3\n'
                                   '0   1\n'
                                   '1   2\n'
                                   '2   3'))

    def test_to_string_buffer_all_unicode(self):
        buf = StringIO()

        empty = DataFrame({u'c/\u03c3':Series()})
        nonempty = DataFrame({u'c/\u03c3':Series([1,2,3])})

        print >>buf, empty
        print >>buf, nonempty

        # this should work
        buf.getvalue()

    def test_to_html_unicode(self):
        # it works!
        df = DataFrame({u'\u03c3' : np.arange(10.)})
        df.to_html()
        df = DataFrame({'A' : [u'\u03c3']})
        df.to_html()

    def test_nonunicode_nonascii_alignment(self):
        df = DataFrame([["aa\xc3\xa4\xc3\xa4", 1], ["bbbb", 2]])
        rep_str = df.to_string()
        lines = rep_str.split('\n')
        self.assert_(len(lines[1]) == len(lines[2]))

    def test_unicode_problem_decoding_as_ascii(self):
        dm = DataFrame({u'c/\u03c3': Series({'test':np.NaN})})
        unicode(dm.to_string())

    def test_string_repr_encoding(self):
        pth = curpath()
        filepath = os.path.join(pth, 'data', 'unicode_series.csv')
        df = pandas.read_csv(filepath, header=None)
        repr(df)
        repr(df['X.2'])

    def test_repr_corner(self):
        # representing infs poses no problems
        df = DataFrame({'foo' : np.inf * np.empty(10)})
        foo = repr(df)

    def test_frame_info_encoding(self):
        index = ['\'Til There Was You (1997)',
                 '\xc1 k\xf6ldum klaka (Cold Fever) (1994)']
        fmt.set_printoptions(max_rows=1)
        df = DataFrame(columns=['a', 'b', 'c'], index=index)
        repr(df)
        repr(df.T)
        fmt.set_printoptions(max_rows=200)

    def test_to_string(self):
        from pandas import read_table
        import re

        # big mixed
        biggie = DataFrame({'A' : randn(200),
                            'B' : tm.makeStringIndex(200)},
                            index=range(200))

        biggie['A'][:20] = nan
        biggie['B'][:20] = nan
        s = biggie.to_string()

        buf = StringIO()
        retval = biggie.to_string(buf=buf)
        self.assert_(retval is None)
        self.assertEqual(buf.getvalue(), s)

        self.assert_(isinstance(s, basestring))

        # print in right order
        result = biggie.to_string(columns=['B', 'A'], col_space=17,
                                  float_format='%.5f'.__mod__)
        lines = result.split('\n')
        header = lines[0].strip().split()
        joined = '\n'.join([re.sub('\s+', ' ', x).strip() for x in lines[1:]])
        recons = read_table(StringIO(joined), names=header, sep=' ')
        tm.assert_series_equal(recons['B'], biggie['B'])
        self.assertEqual(recons['A'].count(), biggie['A'].count())
        self.assert_((np.abs(recons['A'].dropna() -
                             biggie['A'].dropna()) < 0.1).all())

        # expected = ['B', 'A']
        # self.assertEqual(header, expected)

        result = biggie.to_string(columns=['A'], col_space=17)
        header = result.split('\n')[0].strip().split()
        expected = ['A']
        self.assertEqual(header, expected)

        biggie.to_string(columns=['B', 'A'],
                         formatters={'A' : lambda x: '%.1f' % x})

        biggie.to_string(columns=['B', 'A'], float_format=str)
        biggie.to_string(columns=['B', 'A'], col_space=12,
                         float_format=str)

        frame = DataFrame(index=np.arange(200))
        frame.to_string()

    def test_to_string_no_header(self):
        df = DataFrame({'x' : [1, 2, 3],
                        'y' : [4, 5, 6]})

        df_s = df.to_string(header=False)
        expected = "0  1  4\n1  2  5\n2  3  6"

        assert(df_s == expected)

    def test_to_string_no_index(self):
        df = DataFrame({'x' : [1, 2, 3],
                        'y' : [4, 5, 6]})

        df_s = df.to_string(index=False)
        expected = " x  y\n 1  4\n 2  5\n 3  6"

        assert(df_s == expected)

    def test_to_string_float_formatting(self):
        fmt.reset_printoptions()
        fmt.set_printoptions(precision=6, column_space=12,
                             notebook_repr_html=False)

        df = DataFrame({'x' : [0, 0.25, 3456.000, 12e+45, 1.64e+6,
                               1.7e+8, 1.253456, np.pi, -1e6]})

        df_s = df.to_string()

        # Python 2.5 just wants me to be sad. And debian 32-bit
        #sys.version_info[0] == 2 and sys.version_info[1] < 6:
        if '%.4g' % 1.7e8 == '1.7e+008':
            expected = ('              x\n0  0.00000e+000\n1  2.50000e-001\n'
                        '2  3.45600e+003\n3  1.20000e+046\n4  1.64000e+006\n'
                        '5  1.70000e+008\n6  1.25346e+000\n7  3.14159e+000\n'
                        '8 -1.00000e+006')
        else:
            expected = ('             x\n0  0.00000e+00\n1  2.50000e-01\n'
                        '2  3.45600e+03\n3  1.20000e+46\n4  1.64000e+06\n'
                        '5  1.70000e+08\n6  1.25346e+00\n7  3.14159e+00\n'
                        '8 -1.00000e+06')
        assert(df_s == expected)

        df = DataFrame({'x' : [3234, 0.253]})
        df_s = df.to_string()

        expected = ('          x\n'
                    '0  3234.000\n'
                    '1     0.253')
        assert(df_s == expected)

        fmt.reset_printoptions()
        self.assertEqual(fmt.print_config.precision, 7)

        df = DataFrame({'x': [1e9, 0.2512]})
        df_s = df.to_string()
        # Python 2.5 just wants me to be sad. And debian 32-bit
        #sys.version_info[0] == 2 and sys.version_info[1] < 6:
        if '%.4g' % 1.7e8 == '1.7e+008':
            expected = ('               x\n'
                        '0  1.000000e+009\n'
                        '1  2.512000e-001')
        else:
            expected = ('              x\n'
                        '0  1.000000e+09\n'
                        '1  2.512000e-01')
        assert(df_s == expected)

    def test_to_string_float_index(self):
        index = Index([1.5, 2, 3, 4, 5])
        df = DataFrame(range(5), index=index)

        result = df.to_string()
        expected = ('     0\n'
                    '1.5  0\n'
                    '2    1\n'
                    '3    2\n'
                    '4    3\n'
                    '5    4')
        self.assertEqual(result, expected)

    def test_to_string_ascii_error(self):
        data = [('0  ',
                 u'                        .gitignore ',
                 u'     5 ',
                 ' \xe2\x80\xa2\xe2\x80\xa2\xe2\x80'
                 '\xa2\xe2\x80\xa2\xe2\x80\xa2')]
        df = DataFrame(data)

        # it works!
        repr(df)

    def test_to_string_int_formatting(self):
        df = DataFrame({'x' : [-15, 20, 25, -35]})
        self.assert_(issubclass(df['x'].dtype.type, np.integer))

        output = df.to_string()
        self.assert_(isinstance(output, str))
        expected = ('    x\n'
                    '0 -15\n'
                    '1  20\n'
                    '2  25\n'
                    '3 -35')
        self.assertEqual(output, expected)

    def test_to_string_left_justify_cols(self):
        fmt.reset_printoptions()
        df = DataFrame({'x' : [3234, 0.253]})
        df_s = df.to_string(justify='left')
        expected = ('   x       \n'
                    '0  3234.000\n'
                    '1     0.253')
        assert(df_s == expected)

    def test_to_string_format_na(self):
        fmt.reset_printoptions()
        df = DataFrame({'A' : [np.nan, -1, -2.1234, 3, 4],
                        'B' : [np.nan, 'foo', 'foooo', 'fooooo', 'bar']})
        result = df.to_string()

        expected = ('        A       B\n'
                    '0     NaN     NaN\n'
                    '1 -1.0000     foo\n'
                    '2 -2.1234   foooo\n'
                    '3  3.0000  fooooo\n'
                    '4  4.0000     bar')
        self.assertEqual(result, expected)

        df = DataFrame({'A' : [np.nan, -1., -2., 3., 4.],
                        'B' : [np.nan, 'foo', 'foooo', 'fooooo', 'bar']})
        result = df.to_string()

        expected = ('    A       B\n'
                    '0 NaN     NaN\n'
                    '1  -1     foo\n'
                    '2  -2   foooo\n'
                    '3   3  fooooo\n'
                    '4   4     bar')
        self.assertEqual(result, expected)

    def test_to_html(self):
        # big mixed
        biggie = DataFrame({'A' : randn(200),
                            'B' : tm.makeStringIndex(200)},
                            index=range(200))

        biggie['A'][:20] = nan
        biggie['B'][:20] = nan
        s = biggie.to_html()

        buf = StringIO()
        retval = biggie.to_html(buf=buf)
        self.assert_(retval is None)
        self.assertEqual(buf.getvalue(), s)

        self.assert_(isinstance(s, basestring))

        biggie.to_html(columns=['B', 'A'], col_space=17)
        biggie.to_html(columns=['B', 'A'],
                       formatters={'A' : lambda x: '%.1f' % x})

        biggie.to_html(columns=['B', 'A'], float_format=str)
        biggie.to_html(columns=['B', 'A'], col_space=12,
                       float_format=str)

        frame = DataFrame(index=np.arange(200))
        frame.to_html()

    def test_to_html_with_no_bold(self):
        x = DataFrame({'x': randn(5)})
        ashtml = x.to_html(bold_rows=False)
        assert('<strong>' not in ashtml)

    def test_to_html_columns_arg(self):
        result = self.frame.to_html(columns=['A'])
        self.assert_('<th>B</th>' not in result)

    def test_to_html_multiindex(self):
        columns = pandas.MultiIndex.from_tuples(zip(range(4),
                                                    np.mod(range(4), 2)),
                                                names=['CL0', 'CL1'])
        df = pandas.DataFrame([list('abcd'), list('efgh')], columns=columns)
        result = df.to_html()
        expected = ('<table border="1">\n'
                    '  <thead>\n'
                    '    <tr>\n'
                    '      <th><table><tbody><tr><td>CL0</td></tr><tr>'
                    '<td>CL1</td></tr></tbody></table></th>\n'
                    '      <th><table><tbody><tr><td>0</td></tr><tr>'
                    '<td>0</td></tr></tbody></table></th>\n'
                    '      <th><table><tbody><tr><td>1</td></tr><tr>'
                    '<td>1</td></tr></tbody></table></th>\n'
                    '      <th><table><tbody><tr><td>2</td></tr><tr>'
                    '<td>0</td></tr></tbody></table></th>\n'
                    '      <th><table><tbody><tr><td>3</td></tr><tr>'
                    '<td>1</td></tr></tbody></table></th>\n'
                    '    </tr>\n'
                    '  </thead>\n'
                    '  <tbody>\n'
                    '    <tr>\n'
                    '      <td><strong>0</strong></td>\n'
                    '      <td> a</td>\n'
                    '      <td> b</td>\n'
                    '      <td> c</td>\n'
                    '      <td> d</td>\n'
                    '    </tr>\n'
                    '    <tr>\n'
                    '      <td><strong>1</strong></td>\n'
                    '      <td> e</td>\n'
                    '      <td> f</td>\n'
                    '      <td> g</td>\n'
                    '      <td> h</td>\n'
                    '    </tr>\n'
                    '  </tbody>\n'
                    '</table>')
        self.assertEqual(result, expected)

        columns = pandas.MultiIndex.from_tuples(zip(range(4),
                                                    np.mod(range(4), 2)))
        df = pandas.DataFrame([list('abcd'), list('efgh')], columns=columns)
        result = df.to_html()
        expected = ('<table border="1">\n'
                    '  <thead>\n'
                    '    <tr>\n'
                    '      <th></th>\n'
                    '      <th><table><tbody><tr><td>0</td></tr>'
                    '<tr><td>0</td></tr></tbody></table></th>\n'
                    '      <th><table><tbody><tr><td>1</td></tr>'
                    '<tr><td>1</td></tr></tbody></table></th>\n'
                    '      <th><table><tbody><tr><td>2</td></tr>'
                    '<tr><td>0</td></tr></tbody></table></th>\n'
                    '      <th><table><tbody><tr><td>3</td></tr>'
                    '<tr><td>1</td></tr></tbody></table></th>\n'
                    '    </tr>\n'
                    '  </thead>\n'
                    '  <tbody>\n'
                    '    <tr>\n'
                    '      <td><strong>0</strong></td>\n'
                    '      <td> a</td>\n'
                    '      <td> b</td>\n'
                    '      <td> c</td>\n'
                    '      <td> d</td>\n'
                    '    </tr>\n'
                    '    <tr>\n'
                    '      <td><strong>1</strong></td>\n'
                    '      <td> e</td>\n'
                    '      <td> f</td>\n'
                    '      <td> g</td>\n'
                    '      <td> h</td>\n'
                    '    </tr>\n'
                    '  </tbody>\n'
                    '</table>')
        self.assertEqual(result, expected)

    def test_repr_html(self):
        self.frame._repr_html_()

        fmt.set_printoptions(max_rows=1, max_columns=1)
        self.frame._repr_html_()

        fmt.set_printoptions(notebook_repr_html=False)
        self.frame._repr_html_()

        fmt.reset_printoptions()

class TestSeriesFormatting(unittest.TestCase):

    def setUp(self):
        self.ts = tm.makeTimeSeries()

    def test_repr_unicode(self):
        s = Series([u'\u03c3'] * 10)
        repr(s)

    def test_to_string(self):
        buf = StringIO()

        s = self.ts.to_string()

        retval = self.ts.to_string(buf=buf)
        self.assert_(retval is None)
        self.assertEqual(buf.getvalue().strip(), s)

        # pass float_format
        format = '%.4f'.__mod__
        result = self.ts.to_string(float_format=format)
        result = [x.split()[1] for x in result.split('\n')]
        expected = [format(x) for x in self.ts]
        self.assertEqual(result, expected)

        # empty string
        result = self.ts[:0].to_string()
        self.assertEqual(result, '')

        result = self.ts[:0].to_string(length=0)
        self.assertEqual(result, '')

        # name and length
        cp = self.ts.copy()
        cp.name = 'foo'
        result = cp.to_string(length=True, name=True)
        last_line = result.split('\n')[-1].strip()
        self.assertEqual(last_line, "Freq: B, Name: foo, Length: %d" % len(cp))

    def test_to_string_mixed(self):
        s = Series(['foo', np.nan, -1.23, 4.56])
        result = s.to_string()
        expected = ('0     foo\n'
                    '1     NaN\n'
                    '2   -1.23\n'
                    '3    4.56')
        self.assertEqual(result, expected)

        # but don't count NAs as floats
        s = Series(['foo', np.nan, 'bar', 'baz'])
        result = s.to_string()
        expected = ('0    foo\n'
                    '1    NaN\n'
                    '2    bar\n'
                    '3    baz')
        self.assertEqual(result, expected)

        s = Series(['foo', 5, 'bar', 'baz'])
        result = s.to_string()
        expected = ('0    foo\n'
                    '1      5\n'
                    '2    bar\n'
                    '3    baz')
        self.assertEqual(result, expected)

    def test_to_string_float_na_spacing(self):
        s = Series([0., 1.5678, 2., -3., 4.])
        s[::2] = np.nan

        result = s.to_string()
        expected = ('0       NaN\n'
                    '1    1.5678\n'
                    '2       NaN\n'
                    '3   -3.0000\n'
                    '4       NaN')
        self.assertEqual(result, expected)

class TestEngFormatter(unittest.TestCase):

    def test_eng_float_formatter(self):
        df = DataFrame({'A' : [1.41, 141., 14100, 1410000.]})

        fmt.set_eng_float_format()
        result = df.to_string()
        expected = ('             A\n'
                    '0    1.410E+00\n'
                    '1  141.000E+00\n'
                    '2   14.100E+03\n'
                    '3    1.410E+06')
        self.assertEqual(result, expected)

        fmt.set_eng_float_format(use_eng_prefix=True)
        result = df.to_string()
        expected = ('         A\n'
                    '0    1.410\n'
                    '1  141.000\n'
                    '2  14.100k\n'
                    '3   1.410M')
        self.assertEqual(result, expected)

        fmt.set_eng_float_format(accuracy=0)
        result = df.to_string()
        expected = ('         A\n'
                    '0    1E+00\n'
                    '1  141E+00\n'
                    '2   14E+03\n'
                    '3    1E+06')
        self.assertEqual(result, expected)

        fmt.reset_printoptions()

    def compare(self, formatter, input, output):
        formatted_input = formatter(input)
        msg = ("formatting of %s results in '%s', expected '%s'"
               % (str(input), formatted_input, output))
        self.assertEqual(formatted_input, output, msg)

    def compare_all(self, formatter, in_out):
        """
        Parameters:
        -----------
        formatter: EngFormatter under test
        in_out: list of tuples. Each tuple = (number, expected_formatting)

        It is tested if 'formatter(number) == expected_formatting'.
        *number* should be >= 0 because formatter(-number) == fmt is also
        tested. *fmt* is derived from *expected_formatting*
        """
        for input, output in in_out:
            self.compare(formatter, input, output)
            self.compare(formatter, -input, "-" + output[1:])

    def test_exponents_with_eng_prefix(self):
        formatter = fmt.EngFormatter(accuracy=3, use_eng_prefix=True)
        f = np.sqrt(2)
        in_out = [(f * 10 ** -24, " 1.414y"),
                  (f * 10 ** -23, " 14.142y"),
                  (f * 10 ** -22, " 141.421y"),
                  (f * 10 ** -21, " 1.414z"),
                  (f * 10 ** -20, " 14.142z"),
                  (f * 10 ** -19, " 141.421z"),
                  (f * 10 ** -18, " 1.414a"),
                  (f * 10 ** -17, " 14.142a"),
                  (f * 10 ** -16, " 141.421a"),
                  (f * 10 ** -15, " 1.414f"),
                  (f * 10 ** -14, " 14.142f"),
                  (f * 10 ** -13, " 141.421f"),
                  (f * 10 ** -12, " 1.414p"),
                  (f * 10 ** -11, " 14.142p"),
                  (f * 10 ** -10, " 141.421p"),
                  (f * 10 ** -9, " 1.414n"),
                  (f * 10 ** -8, " 14.142n"),
                  (f * 10 ** -7, " 141.421n"),
                  (f * 10 ** -6, " 1.414u"),
                  (f * 10 ** -5, " 14.142u"),
                  (f * 10 ** -4, " 141.421u"),
                  (f * 10 ** -3, " 1.414m"),
                  (f * 10 ** -2, " 14.142m"),
                  (f * 10 ** -1, " 141.421m"),
                  (f * 10 ** 0, " 1.414"),
                  (f * 10 ** 1, " 14.142"),
                  (f * 10 ** 2, " 141.421"),
                  (f * 10 ** 3, " 1.414k"),
                  (f * 10 ** 4, " 14.142k"),
                  (f * 10 ** 5, " 141.421k"),
                  (f * 10 ** 6, " 1.414M"),
                  (f * 10 ** 7, " 14.142M"),
                  (f * 10 ** 8, " 141.421M"),
                  (f * 10 ** 9, " 1.414G"),
                  (f * 10 ** 10, " 14.142G"),
                  (f * 10 ** 11, " 141.421G"),
                  (f * 10 ** 12, " 1.414T"),
                  (f * 10 ** 13, " 14.142T"),
                  (f * 10 ** 14, " 141.421T"),
                  (f * 10 ** 15, " 1.414P"),
                  (f * 10 ** 16, " 14.142P"),
                  (f * 10 ** 17, " 141.421P"),
                  (f * 10 ** 18, " 1.414E"),
                  (f * 10 ** 19, " 14.142E"),
                  (f * 10 ** 20, " 141.421E"),
                  (f * 10 ** 21, " 1.414Z"),
                  (f * 10 ** 22, " 14.142Z"),
                  (f * 10 ** 23, " 141.421Z"),
                  (f * 10 ** 24, " 1.414Y"),
                  (f * 10 ** 25, " 14.142Y"),
                  (f * 10 ** 26, " 141.421Y")]
        self.compare_all(formatter, in_out)

    def test_exponents_without_eng_prefix(self):
        formatter = fmt.EngFormatter(accuracy=4, use_eng_prefix=False)
        f = np.pi
        in_out = [(f * 10 ** -24, " 3.1416E-24"),
                  (f * 10 ** -23, " 31.4159E-24"),
                  (f * 10 ** -22, " 314.1593E-24"),
                  (f * 10 ** -21, " 3.1416E-21"),
                  (f * 10 ** -20, " 31.4159E-21"),
                  (f * 10 ** -19, " 314.1593E-21"),
                  (f * 10 ** -18, " 3.1416E-18"),
                  (f * 10 ** -17, " 31.4159E-18"),
                  (f * 10 ** -16, " 314.1593E-18"),
                  (f * 10 ** -15, " 3.1416E-15"),
                  (f * 10 ** -14, " 31.4159E-15"),
                  (f * 10 ** -13, " 314.1593E-15"),
                  (f * 10 ** -12, " 3.1416E-12"),
                  (f * 10 ** -11, " 31.4159E-12"),
                  (f * 10 ** -10, " 314.1593E-12"),
                  (f * 10 ** -9, " 3.1416E-09"),
                  (f * 10 ** -8, " 31.4159E-09"),
                  (f * 10 ** -7, " 314.1593E-09"),
                  (f * 10 ** -6, " 3.1416E-06"),
                  (f * 10 ** -5, " 31.4159E-06"),
                  (f * 10 ** -4, " 314.1593E-06"),
                  (f * 10 ** -3, " 3.1416E-03"),
                  (f * 10 ** -2, " 31.4159E-03"),
                  (f * 10 ** -1, " 314.1593E-03"),
                  (f * 10 ** 0, " 3.1416E+00"),
                  (f * 10 ** 1, " 31.4159E+00"),
                  (f * 10 ** 2, " 314.1593E+00"),
                  (f * 10 ** 3, " 3.1416E+03"),
                  (f * 10 ** 4, " 31.4159E+03"),
                  (f * 10 ** 5, " 314.1593E+03"),
                  (f * 10 ** 6, " 3.1416E+06"),
                  (f * 10 ** 7, " 31.4159E+06"),
                  (f * 10 ** 8, " 314.1593E+06"),
                  (f * 10 ** 9, " 3.1416E+09"),
                  (f * 10 ** 10, " 31.4159E+09"),
                  (f * 10 ** 11, " 314.1593E+09"),
                  (f * 10 ** 12, " 3.1416E+12"),
                  (f * 10 ** 13, " 31.4159E+12"),
                  (f * 10 ** 14, " 314.1593E+12"),
                  (f * 10 ** 15, " 3.1416E+15"),
                  (f * 10 ** 16, " 31.4159E+15"),
                  (f * 10 ** 17, " 314.1593E+15"),
                  (f * 10 ** 18, " 3.1416E+18"),
                  (f * 10 ** 19, " 31.4159E+18"),
                  (f * 10 ** 20, " 314.1593E+18"),
                  (f * 10 ** 21, " 3.1416E+21"),
                  (f * 10 ** 22, " 31.4159E+21"),
                  (f * 10 ** 23, " 314.1593E+21"),
                  (f * 10 ** 24, " 3.1416E+24"),
                  (f * 10 ** 25, " 31.4159E+24"),
                  (f * 10 ** 26, " 314.1593E+24")]
        self.compare_all(formatter, in_out)

    def test_rounding(self):
        formatter = fmt.EngFormatter(accuracy=3, use_eng_prefix=True)
        in_out = [(5.55555, ' 5.556'),
                  (55.5555, ' 55.556'),
                  (555.555, ' 555.555'),
                  (5555.55, ' 5.556k'),
                  (55555.5, ' 55.556k'),
                  (555555, ' 555.555k')]
        self.compare_all(formatter, in_out)

        formatter = fmt.EngFormatter(accuracy=1, use_eng_prefix=True)
        in_out = [(5.55555, ' 5.6'),
                  (55.5555, ' 55.6'),
                  (555.555, ' 555.6'),
                  (5555.55, ' 5.6k'),
                  (55555.5, ' 55.6k'),
                  (555555, ' 555.6k')]
        self.compare_all(formatter, in_out)

        formatter = fmt.EngFormatter(accuracy=0, use_eng_prefix=True)
        in_out = [(5.55555, ' 6'),
                  (55.5555, ' 56'),
                  (555.555, ' 556'),
                  (5555.55, ' 6k'),
                  (55555.5, ' 56k'),
                  (555555, ' 556k')]
        self.compare_all(formatter, in_out)

        formatter = fmt.EngFormatter(accuracy=3, use_eng_prefix=True)
        result = formatter(0)
        self.assertEqual(result, u' 0.000')


class TestFloatArrayFormatter(unittest.TestCase):

    def test_misc(self):
        obj = fmt.FloatArrayFormatter(np.array([], dtype=np.float64))
        result = obj.get_result()

if __name__ == '__main__':
    import nose
    nose.runmodule(argv=[__file__,'-vvs','-x','--pdb', '--pdb-failure'],
                   exit=False)