Python locale 模块，CHAR_MAX 实例源码

def _group_lengths(grouping):
    """Convert a localeconv-style grouping into a (possibly infinite)
    iterable of integers representing group lengths.

    """
    # The result from localeconv()['grouping'], and the input to this
    # function, should be a list of integers in one of the
    # following three forms:
    #
    #   (1) an empty list, or
    #   (2) nonempty list of positive integers + [0]
    #   (3) list of positive integers + [locale.CHAR_MAX], or

    from itertools import chain, repeat
    if not grouping:
        return []
    elif grouping[-1] == 0 and len(grouping) >= 2:
        return chain(grouping[:-1], repeat(grouping[-2]))
    elif grouping[-1] == _locale.CHAR_MAX:
        return grouping[:-1]
    else:
        raise ValueError('unrecognised format for grouping')

def _group_lengths(grouping):
    """Convert a localeconv-style grouping into a (possibly infinite)
    iterable of integers representing group lengths.

    """
    # The result from localeconv()['grouping'], and the input to this
    # function, should be a list of integers in one of the
    # following three forms:
    #
    #   (1) an empty list, or
    #   (2) nonempty list of positive integers + [0]
    #   (3) list of positive integers + [locale.CHAR_MAX], or

    from itertools import chain, repeat
    if not grouping:
        return []
    elif grouping[-1] == 0 and len(grouping) >= 2:
        return chain(grouping[:-1], repeat(grouping[-2]))
    elif grouping[-1] == _locale.CHAR_MAX:
        return grouping[:-1]
    else:
        raise ValueError('unrecognised format for grouping')

def _group_lengths(grouping):
    """Convert a localeconv-style grouping into a (possibly infinite)
    iterable of integers representing group lengths.

    """
    # The result from localeconv()['grouping'], and the input to this
    # function, should be a list of integers in one of the
    # following three forms:
    #
    #   (1) an empty list, or
    #   (2) nonempty list of positive integers + [0]
    #   (3) list of positive integers + [locale.CHAR_MAX], or

    from itertools import chain, repeat
    if not grouping:
        return []
    elif grouping[-1] == 0 and len(grouping) >= 2:
        return chain(grouping[:-1], repeat(grouping[-2]))
    elif grouping[-1] == _locale.CHAR_MAX:
        return grouping[:-1]
    else:
        raise ValueError('unrecognised format for grouping')

def _group_lengths(grouping):
    """Convert a localeconv-style grouping into a (possibly infinite)
    iterable of integers representing group lengths.

    """
    # The result from localeconv()['grouping'], and the input to this
    # function, should be a list of integers in one of the
    # following three forms:
    #
    #   (1) an empty list, or
    #   (2) nonempty list of positive integers + [0]
    #   (3) list of positive integers + [locale.CHAR_MAX], or

    from itertools import chain, repeat
    if not grouping:
        return []
    elif grouping[-1] == 0 and len(grouping) >= 2:
        return chain(grouping[:-1], repeat(grouping[-2]))
    elif grouping[-1] == _locale.CHAR_MAX:
        return grouping[:-1]
    else:
        raise ValueError('unrecognised format for grouping')

def _group_lengths(grouping):
    """Convert a localeconv-style grouping into a (possibly infinite)
    iterable of integers representing group lengths.

    """
    # The result from localeconv()['grouping'], and the input to this
    # function, should be a list of integers in one of the
    # following three forms:
    #
    #   (1) an empty list, or
    #   (2) nonempty list of positive integers + [0]
    #   (3) list of positive integers + [locale.CHAR_MAX], or

    from itertools import chain, repeat
    if not grouping:
        return []
    elif grouping[-1] == 0 and len(grouping) >= 2:
        return chain(grouping[:-1], repeat(grouping[-2]))
    elif grouping[-1] == _locale.CHAR_MAX:
        return grouping[:-1]
    else:
        raise ValueError('unrecognised format for grouping')

def _group_lengths(grouping):
    """Convert a localeconv-style grouping into a (possibly infinite)
    iterable of integers representing group lengths.

    """
    # The result from localeconv()['grouping'], and the input to this
    # function, should be a list of integers in one of the
    # following three forms:
    #
    #   (1) an empty list, or
    #   (2) nonempty list of positive integers + [0]
    #   (3) list of positive integers + [locale.CHAR_MAX], or

    from itertools import chain, repeat
    if not grouping:
        return []
    elif grouping[-1] == 0 and len(grouping) >= 2:
        return chain(grouping[:-1], repeat(grouping[-2]))
    elif grouping[-1] == _locale.CHAR_MAX:
        return grouping[:-1]
    else:
        raise ValueError('unrecognised format for grouping')

def _group_lengths(grouping):
    """Convert a localeconv-style grouping into a (possibly infinite)
    iterable of integers representing group lengths.

    """
    # The result from localeconv()['grouping'], and the input to this
    # function, should be a list of integers in one of the
    # following three forms:
    #
    #   (1) an empty list, or
    #   (2) nonempty list of positive integers + [0]
    #   (3) list of positive integers + [locale.CHAR_MAX], or

    from itertools import chain, repeat
    if not grouping:
        return []
    elif grouping[-1] == 0 and len(grouping) >= 2:
        return chain(grouping[:-1], repeat(grouping[-2]))
    elif grouping[-1] == _locale.CHAR_MAX:
        return grouping[:-1]
    else:
        raise ValueError('unrecognised format for grouping')

def _group_lengths(grouping):
    """Convert a localeconv-style grouping into a (possibly infinite)
    iterable of integers representing group lengths.

    """
    # The result from localeconv()['grouping'], and the input to this
    # function, should be a list of integers in one of the
    # following three forms:
    #
    #   (1) an empty list, or
    #   (2) nonempty list of positive integers + [0]
    #   (3) list of positive integers + [locale.CHAR_MAX], or

    from itertools import chain, repeat
    if not grouping:
        return []
    elif grouping[-1] == 0 and len(grouping) >= 2:
        return chain(grouping[:-1], repeat(grouping[-2]))
    elif grouping[-1] == _locale.CHAR_MAX:
        return grouping[:-1]
    else:
        raise ValueError('unrecognised format for grouping')

def _group_lengths(grouping):
    """Convert a localeconv-style grouping into a (possibly infinite)
    iterable of integers representing group lengths.

    """
    # The result from localeconv()['grouping'], and the input to this
    # function, should be a list of integers in one of the
    # following three forms:
    #
    #   (1) an empty list, or
    #   (2) nonempty list of positive integers + [0]
    #   (3) list of positive integers + [locale.CHAR_MAX], or

    from itertools import chain, repeat
    if not grouping:
        return []
    elif grouping[-1] == 0 and len(grouping) >= 2:
        return chain(grouping[:-1], repeat(grouping[-2]))
    elif grouping[-1] == _locale.CHAR_MAX:
        return grouping[:-1]
    else:
        raise ValueError('unrecognised format for grouping')

def _group_lengths(grouping):
    """Convert a localeconv-style grouping into a (possibly infinite)
    iterable of integers representing group lengths.

    """
    # The result from localeconv()['grouping'], and the input to this
    # function, should be a list of integers in one of the
    # following three forms:
    #
    #   (1) an empty list, or
    #   (2) nonempty list of positive integers + [0]
    #   (3) list of positive integers + [locale.CHAR_MAX], or

    from itertools import chain, repeat
    if not grouping:
        return []
    elif grouping[-1] == 0 and len(grouping) >= 2:
        return chain(grouping[:-1], repeat(grouping[-2]))
    elif grouping[-1] == _locale.CHAR_MAX:
        return grouping[:-1]
    else:
        raise ValueError('unrecognised format for grouping')

def _group_lengths(grouping):
    """Convert a localeconv-style grouping into a (possibly infinite)
    iterable of integers representing group lengths.

    """
    # The result from localeconv()['grouping'], and the input to this
    # function, should be a list of integers in one of the
    # following three forms:
    #
    #   (1) an empty list, or
    #   (2) nonempty list of positive integers + [0]
    #   (3) list of positive integers + [locale.CHAR_MAX], or

    from itertools import chain, repeat
    if not grouping:
        return []
    elif grouping[-1] == 0 and len(grouping) >= 2:
        return chain(grouping[:-1], repeat(grouping[-2]))
    elif grouping[-1] == _locale.CHAR_MAX:
        return grouping[:-1]
    else:
        raise ValueError('unrecognised format for grouping')

def _group_lengths(grouping):
    """Convert a localeconv-style grouping into a (possibly infinite)
    iterable of integers representing group lengths.

    """
    # The result from localeconv()['grouping'], and the input to this
    # function, should be a list of integers in one of the
    # following three forms:
    #
    #   (1) an empty list, or
    #   (2) nonempty list of positive integers + [0]
    #   (3) list of positive integers + [locale.CHAR_MAX], or

    from itertools import chain, repeat
    if not grouping:
        return []
    elif grouping[-1] == 0 and len(grouping) >= 2:
        return chain(grouping[:-1], repeat(grouping[-2]))
    elif grouping[-1] == _locale.CHAR_MAX:
        return grouping[:-1]
    else:
        raise ValueError('unrecognised format for grouping')

def test_invalid_override(self):
        Decimal = C.Decimal

        try:
            from locale import CHAR_MAX
        except ImportError:
            return

        def make_grouping(lst):
            return ''.join([chr(x) for x in lst])

        def get_fmt(x, override=None, fmt='n'):
            return Decimal(x).__format__(fmt, override)

        invalid_grouping = {
            'decimal_point' : ',',
            'grouping' : make_grouping([255, 255, 0]),
            'thousands_sep' : ','
        }
        invalid_dot = {
            'decimal_point' : 'xxxxx',
            'grouping' : make_grouping([3, 3, 0]),
            'thousands_sep' : ','
        }
        invalid_sep = {
            'decimal_point' : '.',
            'grouping' : make_grouping([3, 3, 0]),
            'thousands_sep' : 'yyyyy'
        }

        if CHAR_MAX == 127: # negative grouping in override
            self.assertRaises(ValueError, get_fmt, 12345,
                              invalid_grouping, 'g')

        self.assertRaises(ValueError, get_fmt, 12345, invalid_dot, 'g')
        self.assertRaises(ValueError, get_fmt, 12345, invalid_sep, 'g')

def test_invalid_override(self):
        Decimal = C.Decimal

        try:
            from locale import CHAR_MAX
        except ImportError:
            self.skipTest('locale.CHAR_MAX not available')

        def make_grouping(lst):
            return ''.join([chr(x) for x in lst])

        def get_fmt(x, override=None, fmt='n'):
            return Decimal(x).__format__(fmt, override)

        invalid_grouping = {
            'decimal_point' : ',',
            'grouping' : make_grouping([255, 255, 0]),
            'thousands_sep' : ','
        }
        invalid_dot = {
            'decimal_point' : 'xxxxx',
            'grouping' : make_grouping([3, 3, 0]),
            'thousands_sep' : ','
        }
        invalid_sep = {
            'decimal_point' : '.',
            'grouping' : make_grouping([3, 3, 0]),
            'thousands_sep' : 'yyyyy'
        }

        if CHAR_MAX == 127: # negative grouping in override
            self.assertRaises(ValueError, get_fmt, 12345,
                              invalid_grouping, 'g')

        self.assertRaises(ValueError, get_fmt, 12345, invalid_dot, 'g')
        self.assertRaises(ValueError, get_fmt, 12345, invalid_sep, 'g')

def test_invalid_override(self):
        Decimal = C.Decimal

        try:
            from locale import CHAR_MAX
        except ImportError:
            self.skipTest('locale.CHAR_MAX not available')

        def make_grouping(lst):
            return ''.join([chr(x) for x in lst])

        def get_fmt(x, override=None, fmt='n'):
            return Decimal(x).__format__(fmt, override)

        invalid_grouping = {
            'decimal_point' : ',',
            'grouping' : make_grouping([255, 255, 0]),
            'thousands_sep' : ','
        }
        invalid_dot = {
            'decimal_point' : 'xxxxx',
            'grouping' : make_grouping([3, 3, 0]),
            'thousands_sep' : ','
        }
        invalid_sep = {
            'decimal_point' : '.',
            'grouping' : make_grouping([3, 3, 0]),
            'thousands_sep' : 'yyyyy'
        }

        if CHAR_MAX == 127: # negative grouping in override
            self.assertRaises(ValueError, get_fmt, 12345,
                              invalid_grouping, 'g')

        self.assertRaises(ValueError, get_fmt, 12345, invalid_dot, 'g')
        self.assertRaises(ValueError, get_fmt, 12345, invalid_sep, 'g')

def _group(lang, s, monetary=None):
        # Code from _group in locale.py

        # Iterate over grouping intervals
        def _grouping_intervals(grouping):
            last_interval = 0
            for interval in grouping:
                # if grouping is -1, we are done
                if interval == CHAR_MAX:
                    return
                # 0: re-use last group ad infinitum
                if interval == 0:
                    while True:
                        yield last_interval
                yield interval
                last_interval = interval

        if monetary:
            thousands_sep = monetary.mon_thousands_sep
            grouping = literal_eval(monetary.mon_grouping)
        else:
            thousands_sep = lang.thousands_sep
            grouping = literal_eval(lang.grouping)
        if not grouping:
            return (s, 0)
        if s[-1] == ' ':
            stripped = s.rstrip()
            right_spaces = s[len(stripped):]
            s = stripped
        else:
            right_spaces = ''
        left_spaces = ''
        groups = []
        for interval in _grouping_intervals(grouping):
            if not s or s[-1] not in "0123456789":
                # only non-digit characters remain (sign, spaces)
                left_spaces = s
                s = ''
                break
            groups.append(s[-interval:])
            s = s[:-interval]
        if s:
            groups.append(s)
        groups.reverse()
        return (
            left_spaces + thousands_sep.join(groups) + right_spaces,
            len(thousands_sep) * (len(groups) - 1)
        )