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    Some standard checks are provided for basic data types.
    Additional checks are easy to write. They can be
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    The standard functions work with the following basic data types :
    
    * integers
    * floats
    * booleans
    * strings
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    plus lists of these datatypes
    
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    The full set of standard checks are : 
    
    * 'integer': matches integer values (including negative)
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                   integer(min=0) # any positive value
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    * 'float': matches float values
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    * 'boolean': matches boolean values - ``True`` or ``False``
                 Acceptable string values for True are :
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                 Any other value raises an error.
    
    * 'ip_addr': matches an Internet Protocol address, v.4, represented
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    * 'string': matches any string.
                Takes optional keyword args 'min' and 'max'
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    * 'list': matches any list.
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    * 'tuple': matches any tuple.
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    * 'int_list': Matches a list of integers.
                  Takes the same arguments as list.
    
    * 'float_list': Matches a list of floats.
                    Takes the same arguments as list.
    
    * 'bool_list': Matches a list of boolean values.
                   Takes the same arguments as list.
    
    * 'ip_addr_list': Matches a list of IP addresses.
                     Takes the same arguments as list.
    
    * 'string_list': Matches a list of strings.
                     Takes the same arguments as list.
    
    * 'mixed_list': Matches a list with different types in 
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                    Each position can be one of :
                    'integer', 'float', 'ip_addr', 'string', 'boolean'
    
                    So to specify a list with two strings followed
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                      mixed_list('string', 'string', 'integer', 'integer')
    
    * 'pass': This check matches everything ! It never fails
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              It is also the default if no check is specified.
    
    * 'option': This check matches any from a list of options.
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    16908291
    >>> int(dottedQuadToNum('1.2.3.4'))
    16909060
    >>> dottedQuadToNum('255.255.255.255')
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    >>> numToDottedQuad(long(16777218))
    '1.0.0.2'
    >>> numToDottedQuad(long(16908291))
    '1.2.0.3'
    >>> numToDottedQuad(long(16909060))
    '1.2.3.4'
    >>> numToDottedQuad(long(4294967295))
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    ValueError: Not a good numeric IP: 4294967296
    >>> numToDottedQuad(-1)
    Traceback (most recent call last):
    ValueError: Not a good numeric IP: -1
    >>> numToDottedQuad(1)
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    >>> numToDottedQuad(16777218)
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    >>> numToDottedQuad(16908291)
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    >>> numToDottedQuad(16909060)
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    >>> numToDottedQuad(4294967295)
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    30
    >>> vtr1.check('int_range(20, 40)', '60')
    Traceback (most recent call last):
    VdtValueTooBigError: the value "60" is too big.
    
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    Traceback (most recent call last):
    VdtValueTooSmallError: the value "9" is too small.
    >>> vtor.check('integer(max=20)', '35')
    Traceback (most recent call last):
    VdtValueTooBigError: the value "35" is too big.
    >>> vtor.check('integer(max=20)', 35)
    Traceback (most recent call last):
    VdtValueTooBigError: the value "35" is too big.
    >>> vtor.check('integer(0, 9)', False)
    0
    ��min�maxN)	r�r�r�r3r�rr1r	r
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    A check that tests that a given value is a float
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    Otherwise a VdtError is raised.
    
    This can accept negative values.
    
    >>> vtor.check('float', '2')
    2.0
    
    From now on we multiply the value to avoid comparing decimals
    
    >>> vtor.check('float', '-6.8') * 10
    -68.0
    >>> vtor.check('float', '12.2') * 10
    122.0
    >>> vtor.check('float', 8.4) * 10
    84.0
    >>> vtor.check('float', 'a')
    Traceback (most recent call last):
    VdtTypeError: the value "a" is of the wrong type.
    >>> vtor.check('float(10.1)', '10.2') * 10
    102.0
    >>> vtor.check('float(max=20.2)', '15.1') * 10
    151.0
    >>> vtor.check('float(10.0)', '9.0')
    Traceback (most recent call last):
    VdtValueTooSmallError: the value "9.0" is too small.
    >>> vtor.check('float(max=20.0)', '35.0')
    Traceback (most recent call last):
    VdtValueTooBigError: the value "35.0" is too big.
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    Check if the value represents a boolean.
    
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    0
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    0
    >>> vtor.check('boolean', '0')
    0
    >>> vtor.check('boolean', 'off')
    0
    >>> vtor.check('boolean', 'false')
    0
    >>> vtor.check('boolean', 'no')
    0
    >>> vtor.check('boolean', 'nO')
    0
    >>> vtor.check('boolean', 'NO')
    0
    >>> vtor.check('boolean', 1)
    1
    >>> vtor.check('boolean', True)
    1
    >>> vtor.check('boolean', '1')
    1
    >>> vtor.check('boolean', 'on')
    1
    >>> vtor.check('boolean', 'true')
    1
    >>> vtor.check('boolean', 'yes')
    1
    >>> vtor.check('boolean', 'Yes')
    1
    >>> vtor.check('boolean', 'YES')
    1
    >>> vtor.check('boolean', '')
    Traceback (most recent call last):
    VdtTypeError: the value "" is of the wrong type.
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    Traceback (most recent call last):
    VdtTypeError: the value "up" is of the wrong type.
    
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    Check that the supplied value is an Internet Protocol address, v.4,
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    >>> vtor.check('ip_addr', '1 ')
    '1'
    >>> vtor.check('ip_addr', ' 1.2')
    '1.2'
    >>> vtor.check('ip_addr', ' 1.2.3 ')
    '1.2.3'
    >>> vtor.check('ip_addr', '1.2.3.4')
    '1.2.3.4'
    >>> vtor.check('ip_addr', '0.0.0.0')
    '0.0.0.0'
    >>> vtor.check('ip_addr', '255.255.255.255')
    '255.255.255.255'
    >>> vtor.check('ip_addr', '255.255.255.256')
    Traceback (most recent call last):
    VdtValueError: the value "255.255.255.256" is unacceptable.
    >>> vtor.check('ip_addr', '1.2.3.4.5')
    Traceback (most recent call last):
    VdtValueError: the value "1.2.3.4.5" is unacceptable.
    >>> vtor.check('ip_addr', 0)
    Traceback (most recent call last):
    VdtTypeError: the value "0" is of the wrong type.
    )r�r�rr/rr1rr�r"r"r$r�s





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    Check that the value is a list of values.
    
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    It does no check on list members.
    
    >>> vtor.check('list', ())
    []
    >>> vtor.check('list', [])
    []
    >>> vtor.check('list', (1, 2))
    [1, 2]
    >>> vtor.check('list', [1, 2])
    [1, 2]
    >>> vtor.check('list(3)', (1, 2))
    Traceback (most recent call last):
    VdtValueTooShortError: the value "(1, 2)" is too short.
    >>> vtor.check('list(max=5)', (1, 2, 3, 4, 5, 6))
    Traceback (most recent call last):
    VdtValueTooLongError: the value "(1, 2, 3, 4, 5, 6)" is too long.
    >>> vtor.check('list(min=3, max=5)', (1, 2, 3, 4))
    [1, 2, 3, 4]
    >>> vtor.check('list', 0)
    Traceback (most recent call last):
    VdtTypeError: the value "0" is of the wrong type.
    >>> vtor.check('list', '12')
    Traceback (most recent call last):
    VdtTypeError: the value "12" is of the wrong type.
    r�N)	r�r�r�rr��	TypeErrorrrrQ�rEr�r��min_len�max_len�num_membersr"r"r$r�s






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    Check that the value is a tuple of values.
    
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    >>> vtor.check('tuple', ())
    ()
    >>> vtor.check('tuple', [])
    ()
    >>> vtor.check('tuple', (1, 2))
    (1, 2)
    >>> vtor.check('tuple', [1, 2])
    (1, 2)
    >>> vtor.check('tuple(3)', (1, 2))
    Traceback (most recent call last):
    VdtValueTooShortError: the value "(1, 2)" is too short.
    >>> vtor.check('tuple(max=5)', (1, 2, 3, 4, 5, 6))
    Traceback (most recent call last):
    VdtValueTooLongError: the value "(1, 2, 3, 4, 5, 6)" is too long.
    >>> vtor.check('tuple(min=3, max=5)', (1, 2, 3, 4))
    (1, 2, 3, 4)
    >>> vtor.check('tuple', 0)
    Traceback (most recent call last):
    VdtTypeError: the value "0" is of the wrong type.
    >>> vtor.check('tuple', '12')
    Traceback (most recent call last):
    VdtTypeError: the value "12" is of the wrong type.
    )rRr�rEr�r�r"r"r$rsrcCs|t|t
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    Check that the supplied value is a string.
    
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    '0'
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    Traceback (most recent call last):
    VdtTypeError: the value "0" is of the wrong type.
    >>> vtor.check('string(2)', '12')
    '12'
    >>> vtor.check('string(2)', '1')
    Traceback (most recent call last):
    VdtValueTooShortError: the value "1" is too short.
    >>> vtor.check('string(min=2, max=3)', '123')
    '123'
    >>> vtor.check('string(min=2, max=3)', '1234')
    Traceback (most recent call last):
    VdtValueTooLongError: the value "1234" is too long.
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    Check that the value is a list of integers.
    
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    >>> vtor.check('int_list', ())
    []
    >>> vtor.check('int_list', [])
    []
    >>> vtor.check('int_list', (1, 2))
    [1, 2]
    >>> vtor.check('int_list', [1, 2])
    [1, 2]
    >>> vtor.check('int_list', [1, 'a'])
    Traceback (most recent call last):
    VdtTypeError: the value "a" is of the wrong type.
    c
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    Check that the value is a list of booleans.
    
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    >>> vtor.check('bool_list', ())
    []
    >>> vtor.check('bool_list', [])
    []
    >>> check_res = vtor.check('bool_list', (True, False))
    >>> check_res == [True, False]
    1
    >>> check_res = vtor.check('bool_list', [True, False])
    >>> check_res == [True, False]
    1
    >>> vtor.check('bool_list', [True, 'a'])
    Traceback (most recent call last):
    VdtTypeError: the value "a" is of the wrong type.
    c
Sr�r")
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    Check that the value is a list of floats.
    
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    Each list member is checked that it is a float.
    
    >>> vtor.check('float_list', ())
    []
    >>> vtor.check('float_list', [])
    []
    >>> vtor.check('float_list', (1, 2.0))
    [1.0, 2.0]
    >>> vtor.check('float_list', [1, 2.0])
    [1.0, 2.0]
    >>> vtor.check('float_list', [1, 'a'])
    Traceback (most recent call last):
    VdtTypeError: the value "a" is of the wrong type.
    c
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    Check that the value is a list of strings.
    
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    >>> vtor.check('string_list', ())
    []
    >>> vtor.check('string_list', [])
    []
    >>> vtor.check('string_list', ('a', 'b'))
    ['a', 'b']
    >>> vtor.check('string_list', ['a', 1])
    Traceback (most recent call last):
    VdtTypeError: the value "1" is of the wrong type.
    >>> vtor.check('string_list', 'hello')
    Traceback (most recent call last):
    VdtTypeError: the value "hello" is of the wrong type.
    c
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    Check that the value is a list of IP addresses.
    
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    Each list member is checked that it is an IP address.
    
    >>> vtor.check('ip_addr_list', ())
    []
    >>> vtor.check('ip_addr_list', [])
    []
    >>> vtor.check('ip_addr_list', ('1.2.3.4', '5.6.7.8'))
    ['1.2.3.4', '5.6.7.8']
    >>> vtor.check('ip_addr_list', ['a'])
    Traceback (most recent call last):
    VdtValueError: the value "a" is unacceptable.
    c
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    Check that a value is a list, coercing strings into
    a list with one member. Useful where users forget the
    trailing comma that turns a single value into a list.
    
    You can optionally specify the minimum and maximum number of members.
    A minumum of greater than one will fail if the user only supplies a
    string.
    
    >>> vtor.check('force_list', ())
    []
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    []
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    ['hello']
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    Check that the value is a list.
    Allow specifying the type of each member.
    Work on lists of specific lengths.
    
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      'integer', 'float', 'ip_addr', 'string', 'boolean'
    
    So you can specify a list of two strings, followed by
    two integers as :
    
      mixed_list('string', 'string', 'integer', 'integer')
    
    The length of the list must match the number of positional
    arguments you supply.
    
    >>> mix_str = "mixed_list('integer', 'float', 'ip_addr', 'string', 'boolean')"
    >>> check_res = vtor.check(mix_str, (1, 2.0, '1.2.3.4', 'a', True))
    >>> check_res == [1, 2.0, '1.2.3.4', 'a', True]
    1
    >>> check_res = vtor.check(mix_str, ('1', '2.0', '1.2.3.4', 'a', 'True'))
    >>> check_res == [1, 2.0, '1.2.3.4', 'a', True]
    1
    >>> vtor.check(mix_str, ('b', 2.0, '1.2.3.4', 'a', True))
    Traceback (most recent call last):
    VdtTypeError: the value "b" is of the wrong type.
    >>> vtor.check(mix_str, (1, 2.0, '1.2.3.4', 'a'))
    Traceback (most recent call last):
    VdtValueTooShortError: the value "(1, 2.0, '1.2.3.4', 'a')" is too short.
    >>> vtor.check(mix_str, (1, 2.0, '1.2.3.4', 'a', 1, 'b'))
    Traceback (most recent call last):
    VdtValueTooLongError: the value "(1, 2.0, '1.2.3.4', 'a', 1, 'b')" is too long.
    >>> vtor.check(mix_str, 0)
    Traceback (most recent call last):
    VdtTypeError: the value "0" is of the wrong type.

    >>> vtor.check('mixed_list("yoda")', ('a'))
    Traceback (most recent call last):
    VdtParamError: passed an incorrect value "KeyError('yoda',)" for parameter "'mixed_list'"
    c
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    This check matches the value to any of a set of options.
    
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    'yoda'
    >>> vtor.check('option("yoda", "jedi")', 'jed')
    Traceback (most recent call last):
    VdtValueError: the value "jed" is unacceptable.
    >>> vtor.check('option("yoda", "jedi")', 0)
    Traceback (most recent call last):
    VdtTypeError: the value "0" is of the wrong type.
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    A function that exists for test purposes.
    
    >>> checks = [
    ...     '3, 6, min=1, max=3, test=list(a, b, c)',
    ...     '3',
    ...     '3, 6',
    ...     '3,',
    ...     'min=1, test="a b c"',
    ...     'min=5, test="a, b, c"',
    ...     'min=1, max=3, test="a, b, c"',
    ...     'min=-100, test=-99',
    ...     'min=1, max=3',
    ...     '3, 6, test="36"',
    ...     '3, 6, test="a, b, c"',
    ...     '3, max=3, test=list("a", "b", "c")',
    ...     '''3, max=3, test=list("'a'", 'b', "x=(c)")''',
    ...     "test='x=fish(3)'",
    ...    ]
    >>> v = Validator({'test': _test})
    >>> for entry in checks:
    ...     pprint(v.check(('test(%s)' % entry), 3))
    (3, ('3', '6'), {'max': '3', 'min': '1', 'test': ['a', 'b', 'c']})
    (3, ('3',), {})
    (3, ('3', '6'), {})
    (3, ('3',), {})
    (3, (), {'min': '1', 'test': 'a b c'})
    (3, (), {'min': '5', 'test': 'a, b, c'})
    (3, (), {'max': '3', 'min': '1', 'test': 'a, b, c'})
    (3, (), {'min': '-100', 'test': '-99'})
    (3, (), {'max': '3', 'min': '1'})
    (3, ('3', '6'), {'test': '36'})
    (3, ('3', '6'), {'test': 'a, b, c'})
    (3, ('3',), {'max': '3', 'test': ['a', 'b', 'c']})
    (3, ('3',), {'max': '3', 'test': ["'a'", 'b', 'x=(c)']})
    (3, (), {'test': 'x=fish(3)'})
    
    >>> v = Validator()
    >>> v.check('integer(default=6)', '3')
    3
    >>> v.check('integer(default=6)', None, True)
    6
    >>> v.get_default_value('integer(default=6)')
    6
    >>> v.get_default_value('float(default=6)')
    6.0
    >>> v.get_default_value('pass(default=None)')
    >>> v.get_default_value("string(default='None')")
    'None'
    >>> v.get_default_value('pass')
    Traceback (most recent call last):
    KeyError: 'Check "pass" has no default value.'
    >>> v.get_default_value('pass(default=list(1, 2, 3, 4))')
    ['1', '2', '3', '4']
    
    >>> v = Validator()
    >>> v.check("pass(default=None)", None, True)
    >>> v.check("pass(default='None')", None, True)
    'None'
    >>> v.check('pass(default="None")', None, True)
    'None'
    >>> v.check('pass(default=list(1, 2, 3, 4))', None, True)
    ['1', '2', '3', '4']
    
    Bug test for unicode arguments
    >>> v = Validator()
    >>> v.check(unicode('string(min=4)'), unicode('test')) == unicode('test')
    True
    
    >>> v = Validator()
    >>> v.get_default_value(unicode('string(min=4, default="1234")')) == unicode('1234')
    True
    >>> v.check(unicode('string(min=4, default="1234")'), unicode('test')) == unicode('test')
    True
    
    >>> v = Validator()
    >>> default = v.get_default_value('string(default=None)')
    >>> default == None
    1
    r")rEr��keywargsr"r"r$�_test8s
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    >>> 
    >>> v = Validator()
    >>> v.get_default_value('string(default="#ff00dd")')
    '#ff00dd'
    >>> v.get_default_value('integer(default=3) # comment')
    3
    Nr"r"r"r"r$�_test2�r&r�c
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    >>> vtor.check('string(default="")', '', missing=True)
    ''
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    '\n'
    >>> print(vtor.check('string(default="\n")', '', missing=True))
    <BLANKLINE>
    <BLANKLINE>
    >>> vtor.check('string()', '\n')
    '\n'
    >>> vtor.check('string(default="\n\n\n")', '', missing=True)
    '\n\n\n'
    >>> vtor.check('string()', 'random \n text goes here\n\n')
    'random \n text goes here\n\n'
    >>> vtor.check('string(default=" \nrandom text\ngoes \n here\n\n ")',
    ... '', missing=True)
    ' \nrandom text\ngoes \n here\n\n '
    >>> vtor.check("string(default='\n\n\n')", '', missing=True)
    '\n\n\n'
    >>> vtor.check("option('\n','a','b',default='\n')", '', missing=True)
    '\n'
    >>> vtor.check("string_list()", ['foo', '\n', 'bar'])
    ['foo', '\n', 'bar']
    >>> vtor.check("string_list(default=list('\n'))", '', missing=True)
    ['\n']
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