B
    CVvg&                 @   s~   d dl Z d dlmZ G dd dZG dd deZG dd deZG d	d
 d
eZ	G dd deZ
dd ZG dd deZdS )    N)Mappingc               @   sR   e Zd ZdZdddZdd Zdd Zd	d
 Zdd Zdd Z	dd Z
dd ZdS )
OrderedSetz?
    A set which keeps the ordering of the inserted items.
    Nc             C   s   t |p
d| _ d S )N )dictfromkeys)selfiterabler   r   ?/tmp/pip-install-o3oxmrkh/Django/django/utils/datastructures.py__init__
   s    zOrderedSet.__init__c             C   s   d | j |< d S )N)r   )r   itemr   r   r	   add   s    zOrderedSet.addc             C   s   | j |= d S )N)r   )r   r   r   r   r	   remove   s    zOrderedSet.removec             C   s(   y|  | W n tk
r"   Y nX d S )N)r   KeyError)r   r   r   r   r	   discard   s    zOrderedSet.discardc             C   s
   t | jS )N)iterr   )r   r   r   r	   __iter__   s    zOrderedSet.__iter__c             C   s
   || j kS )N)r   )r   r   r   r   r	   __contains__   s    zOrderedSet.__contains__c             C   s
   t | jS )N)boolr   )r   r   r   r	   __bool__   s    zOrderedSet.__bool__c             C   s
   t | jS )N)lenr   )r   r   r   r	   __len__"   s    zOrderedSet.__len__)N)__name__
__module____qualname____doc__r
   r   r   r   r   r   r   r   r   r   r   r	   r      s   
r   c               @   s   e Zd ZdS )MultiValueDictKeyErrorN)r   r   r   r   r   r   r	   r   &   s   r   c                   s   e Zd ZdZd/ fdd	Z fddZ fddZ fd	d
Zdd Zdd Z	dd Z
dd Zd0ddZd1 fdd	Zd2ddZ fddZd3ddZd4dd Zd!d" Zd#d$ Z fd%d&Zd'd( Zd)d* Zd+d, Zd-d. Z  ZS )5MultiValueDicta  
    A subclass of dictionary customized to handle multiple values for the
    same key.

    >>> d = MultiValueDict({'name': ['Adrian', 'Simon'], 'position': ['Developer']})
    >>> d['name']
    'Simon'
    >>> d.getlist('name')
    ['Adrian', 'Simon']
    >>> d.getlist('doesnotexist')
    []
    >>> d.getlist('doesnotexist', ['Adrian', 'Simon'])
    ['Adrian', 'Simon']
    >>> d.get('lastname', 'nonexistent')
    'nonexistent'
    >>> d.setlist('lastname', ['Holovaty', 'Willison'])

    This class exists to solve the irritating problem raised by cgi.parse_qs,
    which returns a list for every key, even though most Web forms submit
    single name-value pairs.
    r   c                s   t  | d S )N)superr
   )r   Zkey_to_list_mapping)	__class__r   r	   r
   @   s    zMultiValueDict.__init__c                s   d| j jt  f S )Nz<%s: %s>)r   r   r   __repr__)r   )r   r   r	   r   C   s    zMultiValueDict.__repr__c                sP   yt  |}W n tk
r,   t|Y nX y|d S  tk
rJ   g S X dS )z|
        Return the last data value for this key, or [] if it's an empty list;
        raise KeyError if not found.
        N)r   __getitem__r   r   
IndexError)r   keylist_)r   r   r	   r!   F   s    zMultiValueDict.__getitem__c                s   t  ||g d S )N)r   __setitem__)r   r#   value)r   r   r	   r%   T   s    zMultiValueDict.__setitem__c             C   s   |  dd |  D S )Nc             S   s    g | ]\}}||d d  fqS )Nr   ).0kvr   r   r	   
<listcomp>Y   s   z+MultiValueDict.__copy__.<locals>.<listcomp>)r   lists)r   r   r   r	   __copy__W   s    zMultiValueDict.__copy__c          	   C   sN   |   }||t| < x4t| D ]&\}}t|t||t|| q W |S )N)r   idr   itemsr%   copydeepcopy)r   memoresultr#   r&   r   r   r	   __deepcopy__]   s    zMultiValueDict.__deepcopy__c                s    j d fdd D iS )N_datac                s   i | ]}  ||qS r   )_getlist)r'   r(   )r   r   r	   
<dictcomp>f   s    z/MultiValueDict.__getstate__.<locals>.<dictcomp>)__dict__)r   r   )r   r	   __getstate__e   s    zMultiValueDict.__getstate__c             C   s>   | di }x | D ]\}}| || qW | j| d S )Nr4   )popr.   setlistr7   update)r   Zobj_dictdatar(   r)   r   r   r	   __setstate__h   s    zMultiValueDict.__setstate__Nc             C   s2   y| | }W n t k
r    |S X |g kr.|S |S )z
        Return the last data value for the passed key. If key doesn't exist
        or value is an empty list, return `default`.
        )r   )r   r#   defaultvalr   r   r	   getn   s    zMultiValueDict.getFc                sR   yt  |}W n  tk
r0   |dkr,g S |S X |rJ|dk	rFt|nd}|S dS )z
        Return a list of values for the key.

        Used internally to manipulate values list. If force_list is True,
        return a new copy of values.
        N)r   r!   r   list)r   r#   r>   
force_listvalues)r   r   r	   r5   {   s    zMultiValueDict._getlistc             C   s   | j ||ddS )zn
        Return the list of values for the key. If key doesn't exist, return a
        default value.
        T)rB   )r5   )r   r#   r>   r   r   r	   getlist   s    zMultiValueDict.getlistc                s   t  || d S )N)r   r%   )r   r#   r$   )r   r   r	   r:      s    zMultiValueDict.setlistc             C   s   || kr|| |< | | S )Nr   )r   r#   r>   r   r   r	   
setdefault   s    zMultiValueDict.setdefaultc             C   s*   || kr |d krg }|  || | |S )N)r:   r5   )r   r#   Zdefault_listr   r   r	   setlistdefault   s
    zMultiValueDict.setlistdefaultc             C   s   |  || dS )z8Append an item to the internal list associated with key.N)rF   append)r   r#   r&   r   r   r	   
appendlist   s    zMultiValueDict.appendlistc             c   s    x| D ]}|| | fV  qW dS )zu
        Yield (key, value) pairs, where value is the last item in the list
        associated with the key.
        Nr   )r   r#   r   r   r	   r.      s    
zMultiValueDict.itemsc                s   t t  S )zYield (key, list) pairs.)r   r   r.   )r   )r   r   r	   r+      s    zMultiValueDict.listsc             c   s   x| D ]}| | V  qW dS )z'Yield the last value on every key list.Nr   )r   r#   r   r   r	   rC      s    
zMultiValueDict.valuesc             C   s
   t  | S )z%Return a shallow copy of this object.)r/   )r   r   r   r	   r/      s    zMultiValueDict.copyc             O   s   t |dkrtdt | |r|d }t|trZxZ| D ]\}}| || q<W n4t|trl| }x |D ]\}}| |	| qrW x$| D ]\}}| |	| qW dS )z.Extend rather than replace existing key lists.   z*update expected at most 1 argument, got %dr   N)
r   	TypeError
isinstancer   r+   rF   extendr   r.   rG   )r   argskwargsargr#   Z
value_listr&   r   r   r	   r;      s    

zMultiValueDict.updatec                s    fdd D S )z5Return current object as a dict with singular values.c                s   i | ]} | |qS r   r   )r'   r#   )r   r   r	   r6      s    z'MultiValueDict.dict.<locals>.<dictcomp>r   )r   r   )r   r	   r      s    zMultiValueDict.dict)r   )N)NF)N)N)N)r   r   r   r   r
   r   r!   r%   r,   r3   r8   r=   r@   r5   rD   r:   rE   rF   rH   r.   r+   rC   r/   r;   r   __classcell__r   r   )r   r	   r   *   s,   



	r   c               @   sZ   e Zd ZdZddddZdd ZeZeZeZeZ	eZ
eZeZeZeZeZeZeZeZdS )	ImmutableLista0  
    A tuple-like object that raises useful errors when it is asked to mutate.

    Example::

        >>> a = ImmutableList(range(5), warning="You cannot mutate this.")
        >>> a[3] = '4'
        Traceback (most recent call last):
            ...
        AttributeError: You cannot mutate this.
    z"ImmutableList object is immutable.)warningc            O   s   t j| f||}||_|S )N)tuple__new__rR   )clsrR   rM   rN   r   r   r   r	   rT      s    zImmutableList.__new__c             O   s   t | jd S )N)AttributeErrorrR   )r   rM   rN   r   r   r	   complain   s    zImmutableList.complainN)r   r   r   r   rT   rW   __delitem__Z__delslice____iadd____imul__r%   Z__setslice__rG   rL   insertr9   r   sortreverser   r   r   r	   rQ      s    rQ   c                   s,   e Zd ZdZ fddZ fddZ  ZS )DictWrapperaG  
    Wrap accesses to a dictionary so that certain values (those starting with
    the specified prefix) are passed through a function before being returned.
    The prefix is removed before looking up the real value.

    Used by the SQL construction code to ensure that values are correctly
    quoted before being used.
    c                s   t  | || _|| _d S )N)r   r
   funcprefix)r   r<   r_   r`   )r   r   r	   r
     s    zDictWrapper.__init__c                s@   | | j}|r"|t| jd }t |}|r<| |S |S )z
        Retrieve the real value after stripping the prefix string (if
        present). If the prefix is present, pass the value through self.func
        before returning, otherwise return the raw value.
        N)
startswithr`   r   r   r!   r_   )r   r#   Zuse_funcr&   )r   r   r	   r!   	  s    
zDictWrapper.__getitem__)r   r   r   r   r
   r!   rP   r   r   )r   r	   r^      s   r^   c             c   sb   x\t | D ]P\}}t|dkr2td|t|t|d tsPtd|d  t|V  q
W d S )N   zDdictionary update sequence element #{} has length {}; 2 is required.r   z0Element key %r invalid, only strings are allowed)	enumerater   
ValueErrorformatrK   strrS   )r<   ielemr   r   r	   !_destruct_iterable_mapping_values  s    ri   c               @   sH   e Zd ZdZdd Zdd Zdd Zdd	 Zd
d Zdd Z	dd Z
dS )CaseInsensitiveMappinga  
    Mapping allowing case-insensitive key lookups. Original case of keys is
    preserved for iteration and string representation.

    Example::

        >>> ci_map = CaseInsensitiveMapping({'name': 'Jane'})
        >>> ci_map['Name']
        Jane
        >>> ci_map['NAME']
        Jane
        >>> ci_map['name']
        Jane
        >>> ci_map  # original case preserved
        {'name': 'Jane'}
    c             C   s4   t |tsdd t|D }dd | D | _d S )Nc             S   s   i | ]\}}||qS r   r   )r'   r(   r)   r   r   r	   r6   8  s    z3CaseInsensitiveMapping.__init__.<locals>.<dictcomp>c             S   s   i | ]\}}||f|  qS r   )lower)r'   r(   r)   r   r   r	   r6   9  s    )rK   r   ri   r.   _store)r   r<   r   r   r	   r
   6  s    
zCaseInsensitiveMapping.__init__c             C   s   | j |  d S )NrI   )rl   rk   )r   r#   r   r   r	   r!   ;  s    z"CaseInsensitiveMapping.__getitem__c             C   s
   t | jS )N)r   rl   )r   r   r   r	   r   >  s    zCaseInsensitiveMapping.__len__c             C   s.   t |to,dd |  D dd | D kS )Nc             S   s   i | ]\}}||  qS r   )rk   )r'   r(   r)   r   r   r	   r6   B  s   z1CaseInsensitiveMapping.__eq__.<locals>.<dictcomp>c             S   s   i | ]\}}||  qS r   )rk   )r'   r(   r)   r   r   r	   r6   D  s   )rK   r   r.   )r   otherr   r   r	   __eq__A  s    
zCaseInsensitiveMapping.__eq__c             C   s   dd | j  D S )Nc             s   s   | ]\}}|V  qd S )Nr   )r'   Zoriginal_keyr&   r   r   r	   	<genexpr>I  s    z2CaseInsensitiveMapping.__iter__.<locals>.<genexpr>)rl   rC   )r   r   r   r	   r   H  s    zCaseInsensitiveMapping.__iter__c             C   s   t dd | j D S )Nc             S   s   i | ]\}}||qS r   r   )r'   r#   r&   r   r   r	   r6   L  s    z3CaseInsensitiveMapping.__repr__.<locals>.<dictcomp>)reprrl   rC   )r   r   r   r	   r   K  s    zCaseInsensitiveMapping.__repr__c             C   s   | S )Nr   )r   r   r   r	   r/   N  s    zCaseInsensitiveMapping.copyN)r   r   r   r   r
   r!   r   rn   r   r   r/   r   r   r   r	   rj   $  s   rj   )r/   collections.abcr   r   r   r   r   r   rS   rQ   r^   ri   rj   r   r   r   r	   <module>   s   ! -%