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�l�a � @ sp d dl mZ d dlmZ G dd� d�Zdd� Zdd� Zd d
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eZe ZeZdS )� )�ParseException)�colc @ s( e Zd ZdZdd� Zdd� Zdd� ZdS ) �OnlyOncezI
Wrapper for parse actions, to ensure they are only called once.
c C s ddl m} ||�| _d| _d S )Nr )� _trim_arityF)Zcorer �callable�called)�selfZ method_callr � r �5/usr/lib/python3.9/site-packages/pyparsing/actions.py�__init__ s
zOnlyOnce.__init__c C s. | j s | �|||�}d| _ |S t||d��d S )NTz.OnlyOnce obj called multiple times w/out reset)r r r )r �s�l�t�resultsr r r
�__call__ s
zOnlyOnce.__call__c C s
d| _ dS )zK
Allow the associated parse action to be called once more.
FN)r )r r r r
�reset s zOnlyOnce.resetN)�__name__�
__module__� __qualname__�__doc__r r r r r r r
r s r c s � fdd�}|S )zt
Helper method for defining parse actions that require matching at
a specific column in the input text.
c s$ t || �� kr t| |d�� ���d S )Nz matched token not at column {})r r �format)ZstrgZlocnZtoks��nr r
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verify_col' s z%match_only_at_col.<locals>.verify_colr )r r r r r
�match_only_at_col! s r c s � fdd�S )a�
Helper method for common parse actions that simply return
a literal value. Especially useful when used with
:class:`transform_string<ParserElement.transform_string>` ().
Example::
num = Word(nums).set_parse_action(lambda toks: int(toks[0]))
na = one_of("N/A NA").set_parse_action(replace_with(math.nan))
term = na | num
OneOrMore(term).parse_string("324 234 N/A 234") # -> [324, 234, nan, 234]
c s � gS )Nr �r r
r �Zrepl_strr r
�<lambda>< � z replace_with.<locals>.<lambda>r r r r r
� replace_with. s r c C s |d dd� S )a#
Helper parse action for removing quotation marks from parsed
quoted strings.
Example::
# by default, quotation marks are included in parsed results
quoted_string.parse_string("'Now is the Winter of our Discontent'") # -> ["'Now is the Winter of our Discontent'"]
# use remove_quotes to strip quotation marks from parsed results
quoted_string.set_parse_action(remove_quotes)
quoted_string.parse_string("'Now is the Winter of our Discontent'") # -> ["Now is the Winter of our Discontent"]
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remove_quotes? s r" c s8 | r| dd� � n|� � � dd� � D �� � fdd�}|S )aK
Helper to create a validating parse action to be used with start
tags created with :class:`make_xml_tags` or
:class:`make_html_tags`. Use ``with_attribute`` to qualify
a starting tag with a required attribute value, to avoid false
matches on common tags such as ``<TD>`` or ``<DIV>``.
Call ``with_attribute`` with a series of attribute names and
values. Specify the list of filter attributes names and values as:
- keyword arguments, as in ``(align="right")``, or
- as an explicit dict with ``**`` operator, when an attribute
name is also a Python reserved word, as in ``**{"class":"Customer", "align":"right"}``
- a list of name-value tuples, as in ``(("ns1:class", "Customer"), ("ns2:align", "right"))``
For attribute names with a namespace prefix, you must use the second
form. Attribute names are matched insensitive to upper/lower case.
If just testing for ``class`` (with or without a namespace), use
:class:`with_class`.
To verify that the attribute exists, but without specifying a value,
pass ``with_attribute.ANY_VALUE`` as the value.
Example::
html = '''
<div>
Some text
<div type="grid">1 4 0 1 0</div>
<div type="graph">1,3 2,3 1,1</div>
<div>this has no type</div>
</div>
'''
div,div_end = make_html_tags("div")
# only match div tag having a type attribute with value "grid"
div_grid = div().set_parse_action(with_attribute(type="grid"))
grid_expr = div_grid + SkipTo(div | div_end)("body")
for grid_header in grid_expr.search_string(html):
print(grid_header.body)
# construct a match with any div tag having a type attribute, regardless of the value
div_any_type = div().set_parse_action(with_attribute(type=with_attribute.ANY_VALUE))
div_expr = div_any_type + SkipTo(div | div_end)("body")
for div_header in div_expr.search_string(html):
print(div_header.body)
prints::
1 4 0 1 0
1 4 0 1 0
1,3 2,3 1,1
Nc S s g | ]\}}||f�qS r r )�.0�k�vr r r
�
<listcomp>� r z"with_attribute.<locals>.<listcomp>c sZ � D ]P\}}||vr$t | |d| ��|tjkr|| |krt | |d�||| |���qd S )Nzno matching attribute z+attribute {!r} has value {!r}, must be {!r})r �with_attribute� ANY_VALUEr )r r
�tokensZattrNameZ attrValue��attrsr r
�pa� s
��zwith_attribute.<locals>.pa)�items)�argsZ attr_dictr, r r* r
r' P s 9
r' � c C s$ |rd� |�nd}tf i || i��S )a�
Simplified version of :class:`with_attribute` when
matching on a div class - made difficult because ``class`` is
a reserved word in Python.
Example::
html = '''
<div>
Some text
<div class="grid">1 4 0 1 0</div>
<div class="graph">1,3 2,3 1,1</div>
<div>this <div> has no class</div>
</div>
'''
div,div_end = make_html_tags("div")
div_grid = div().set_parse_action(with_class("grid"))
grid_expr = div_grid + SkipTo(div | div_end)("body")
for grid_header in grid_expr.search_string(html):
print(grid_header.body)
div_any_type = div().set_parse_action(with_class(withAttribute.ANY_VALUE))
div_expr = div_any_type + SkipTo(div | div_end)("body")
for div_header in div_expr.search_string(html):
print(div_header.body)
prints::
1 4 0 1 0
1 4 0 1 0
1,3 2,3 1,1
z{}:class�class)r r' )Z classname� namespaceZ classattrr r r
�
with_class� s $r2 N)r/ )�
exceptionsr �utilr r r r r" r' �objectr( r2 Z replaceWithZ removeQuotesZ
withAttributeZ withClassZmatchOnlyAtColr r r r
�<module> s
O
)