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jinja2.utils
~~~~~~~~~~~~
Utility functions.
:copyright: (c) 2017 by the Jinja Team.
:license: BSD, see LICENSE for more details.
N)deque)
ascii_letters)digits)Lock) text_type string_typesimplements_iterator url_quoteZ MissingType__repr__c C s dS )Nmissing )xr r /usr/lib/python3.6/utils.py s r z\//c C s
d| _ | S )a+ This decorator can be used to mark a function or method context callable.
A context callable is passed the active :class:`Context` as first argument when
called from the template. This is useful if a function wants to get access
to the context or functions provided on the context object. For example
a function that returns a sorted list of template variables the current
template exports could look like this::
@contextfunction
def get_exported_names(context):
return sorted(context.exported_vars)
T)contextfunction)fr r r r s r c C s
d| _ | S )aG This decorator can be used to mark a function or method as an eval
context callable. This is similar to the :func:`contextfunction`
but instead of passing the context, an evaluation context object is
passed. For more information about the eval context, see
:ref:`eval-context`.
.. versionadded:: 2.4
T)evalcontextfunction)r r r r r 0 s r c C s
d| _ | S )zThis decorator can be used to mark a function or method as environment
callable. This decorator works exactly like the :func:`contextfunction`
decorator just that the first argument is the active :class:`Environment`
and not context.
T)environmentfunction)r r r r r = s r c C s t j| j | S )z%Marks the function as internally used)
internal_codeadd__code__)r r r r internalcodeG s r c C s ddl m} t| |S )a Check if the object passed is undefined. This does nothing more than
performing an instance check against :class:`Undefined` but looks nicer.
This can be used for custom filters or tests that want to react to
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this::
def default(var, default=''):
if is_undefined(var):
return default
return var
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isinstance)objr r r r is_undefinedM s r c C s x | D ]}qW dS )z4Consumes an iterable without doing anything with it.Nr )iterableZeventr r r consume] s
r c C s, ddl m} ddlm} | j |j dS )a" Jinja2 keeps internal caches for environments and lexers. These are
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r )_spontaneous_environments) _lexer_cacheN)Zjinja2.environmentr Z jinja2.lexerr! clear)r r! r r r clear_cachesc s r# Fc C s yfd| kr | j dd\}}n6d| krJ| j d}dj|dd }|d }nt| S tt|dd|g|S ttfk
r |s Y nX dS )a Imports an object based on a string. This is useful if you want to
use import paths as endpoints or something similar. An import path can
be specified either in dotted notation (``xml.sax.saxutils.escape``)
or with a colon as object delimiter (``xml.sax.saxutils:escape``).
If the `silent` is True the return value will be `None` if the import
fails.
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r9 c C sJ | dkr dS | t krdS | jjdkr.| jj}n| jjd | jj }d| S ) zReturns the name of the object's type. For some recognized
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__module____name__)r namer r r object_type_repr s
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r< ddlm} || S X dS )zYPrettyprint an object. Either use the `pretty` library or the
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r )pretty)verbose)pformatN)rC r, pprintrE )r rD rC rE r r r rE s rE c C s |fdd}t jdtt| }|r4dtt| p6d}|rHdt| pJd}xt|D ]t\}} d| d }
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| | ||< qXW dj|S ) a Converts any URLs in text into clickable links. Works on http://,
https:// and www. links. Links can have trailing punctuation (periods,
commas, close-parens) and leading punctuation (opening parens) and
it'll still do the right thing.
If trim_url_limit is not None, the URLs in link text will be limited
to trim_url_limit characters.
If nofollow is True, the URLs in link text will get a rel="nofollow"
attribute.
If target is not None, a target attribute will be added to the link.
c S s, |d k r(| d | t | |kr"dp$d p*| S )Nz...r )len)r
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dd |D S )z+Generate some lorem ipsum for the template.r )LOREM_IPSUM_WORDS)choice randrangeTNF rK
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r| utf-8c C sV t | tst| } t | tr&| j|} | r0dp2d}tt| |}|rR|jdd}|S )a& URL escapes a single bytestring or unicode string with the
given charset if applicable to URL safe quoting under all rules
that need to be considered under all supported Python versions.
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representation first.
/ z%20+)r r r encoder replace)r charsetZfor_qsZsafervr r r unicode_urlencode1 s
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dd Zdd Zdd Zd d Zd d Zd!d" Zd#d$ Zd%d& Zd'd( Zd)d* Zd+d, ZeZd-d. Ze ZdS )1LRUCachez"A simple LRU Cache implementation.c C s || _ i | _t | _| j d S )N)capacity_mappingr _queue _postinit)selfr r r r __init__K s zLRUCache.__init__c C s4 | j j| _| j j| _| j j| _t | _| j j | _
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zLRUCache._postinitc C s | j | j| jdS )N)r r r )r r r )r r r r __getstate__Y s zLRUCache.__getstate__c C s | j j| | j d S )N)__dict__updater )r dr r r __setstate__` s zLRUCache.__setstate__c C s | j fS )N)r )r r r r __getnewargs__d s zLRUCache.__getnewargs__c C s* | j | j}|jj| j t| j|_|S )z&Return a shallow copy of the instance.)r> r r r r r )r r r r r copyg s z
LRUCache.copyNc C s" y| | S t k
r |S X dS )z/Return an item from the cache dict or `default`N)KeyError)r keydefaultr r r getn s z LRUCache.getc C sF | j j z*y| | S tk
r0 || |< |S X W d| j j X dS )zvSet `default` if the key is not in the cache otherwise
leave unchanged. Return the value of this key.
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C s4 | j j z| jj | jj W d| j j X dS )zClear the cache.N)r r r r" r r )r r r r r" s
zLRUCache.clearc C s
|| j kS )z$Check if a key exists in this cache.)r )r r r r r __contains__ s zLRUCache.__contains__c C s
t | jS )z%Return the current size of the cache.)rG r )r r r r __len__ s zLRUCache.__len__c C s d| j j| jf S )Nz<%s %r>)r> r@ r )r r r r r
s zLRUCache.__repr__c C sf | j j zJ| j| }| jd |krRy| j| W n tk
rF Y nX | j| |S | j j X dS )zGet an item from the cache. Moves the item up so that it has the
highest priority then.
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r% Nr' )r r r r r
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zLRUCache.__getitem__c
C sf | j j zJ|| jkr"| j| n t| j| jkr>| j| j = | j| || j|< W d| j j X dS )zhSets the value for an item. Moves the item up so that it
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N) r r r r rG r r r r )r r valuer r r __setitem__ s
zLRUCache.__setitem__c C sL | j j z0| j|= y| j| W n tk
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N)r r r r r r )r r r r r __delitem__ s
zLRUCache.__delitem__c s$ fddt jD }|j |S )zReturn a list of items.c s g | ]}| j | fqS r )r )rn r )r r r
s z"LRUCache.items..)listr reverse)r rx r )r r r/ s zLRUCache.itemsc C s t | j S )zIterate over all items.)iterr/ )r r r r iteritems s zLRUCache.iteritemsc C s dd | j D S )z Return a list of all values.c S s g | ] }|d qS )r% r )rn r
r r r r s z#LRUCache.values..)r/ )r r r r values s zLRUCache.valuesc C s t | j S )zIterate over all values.)r r )r r r r itervalue s zLRUCache.itervaluec C s t | S )z7Return a list of all keys ordered by most recent usage.)r )r r r r keys s z
LRUCache.keysc C s t t| jS )z[Iterate over all keys in the cache dict, ordered by
the most recent usage.
)reversedtupler )r r r r iterkeys s zLRUCache.iterkeysc C s t t| jS )zVIterate over the values in the cache dict, oldest items
coming first.
)r r r )r r r r __reversed__ s zLRUCache.__reversed__)N)N) r@ r? __qualname____doc__r r r r r r r r r" r r r
r r r r/ r r r r r __iter__r __copy__r r r r r D s2
r )MutableMappingru htmxmlc s: t dd | D t dd |D fdd}|S )ac Intelligently sets the initial value of autoescaping based on the
filename of the template. This is the recommended way to configure
autoescaping if you do not want to write a custom function yourself.
If you want to enable it for all templates created from strings or
for all templates with `.html` and `.xml` extensions::
from jinja2 import Environment, select_autoescape
env = Environment(autoescape=select_autoescape(
enabled_extensions=('html', 'xml'),
default_for_string=True,
))
Example configuration to turn it on at all times except if the template
ends with `.txt`::
from jinja2 import Environment, select_autoescape
env = Environment(autoescape=select_autoescape(
disabled_extensions=('txt',),
default_for_string=True,
default=True,
))
The `enabled_extensions` is an iterable of all the extensions that
autoescaping should be enabled for. Likewise `disabled_extensions` is
a list of all templates it should be disabled for. If a template is
loaded from a string then the default from `default_for_string` is used.
If nothing matches then the initial value of autoescaping is set to the
value of `default`.
For security reasons this function operates case insensitive.
.. versionadded:: 2.9
c s s | ]}d |j d j V qdS )r& N)lstriplower)rn r
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r c K sB |dkrt j}|| f|jddjddjddjdd }t|S )
a Works exactly like :func:`dumps` but is safe for use in ``