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|
:func:`~pandas.eval` parsers.
|
é )Ú annotationsN)ÚpartialÚreduce©Ú iskeyword)ÚCallableÚTypeVar)ÚPY39)ÚUndefinedVariableError)ÚARITH_OPS_SYMSÚ BOOL_OPS_SYMSÚ CMP_OPS_SYMSÚ LOCAL_TAGÚMATHOPSÚ
|
REDUCTIONSÚUNARY_OPS_SYMSÚBinOpÚConstantÚDivÚFuncNodeÚOpÚTermÚUnaryOpÚis_term)Úclean_backtick_quoted_toksÚtokenize_string)ÚScope)Úprintingztuple[int, str])ÚtokÚreturnc C s | \}}||dkrdn|fS )a`
|
Rewrite the assignment operator for PyTables expressions that use ``=``
|
as a substitute for ``==``.
|
|
Parameters
|
----------
|
tok : tuple of int, str
|
ints correspond to the all caps constants in the tokenize module
|
|
Returns
|
-------
|
tuple of int, str
|
Either the input or token or the replacement values
|
ú=ú==© ©r ÚtoknumÚtokvalr" r" úSd:\z\workplace\vscode\pyvenv\venv\Lib\site-packages\pandas/core/computation/expr.pyÚ_rewrite_assign2 s r' c C sF | \}}|t jkr>|dkr$t jdfS |dkr6t jdfS ||fS ||fS )aj
|
Replace ``&`` with ``and`` and ``|`` with ``or`` so that bitwise
|
precedence is changed to boolean precedence.
|
|
Parameters
|
----------
|
tok : tuple of int, str
|
ints correspond to the all caps constants in the tokenize module
|
|
Returns
|
-------
|
tuple of int, str
|
Either the input or token or the replacement values
|
ú&Úandú|Úor)ÚtokenizeÚOPÚNAMEr# r" r" r& Ú_replace_booleansE s
|
|
|
r/ c C s, | \}}|t jkr$|dkr$t jtfS ||fS )a(
|
Replace local variables with a syntactically valid name.
|
|
Parameters
|
----------
|
tok : tuple of int, str
|
ints correspond to the all caps constants in the tokenize module
|
|
Returns
|
-------
|
tuple of int, str
|
Either the input or token or the replacement values
|
|
Notes
|
-----
|
This is somewhat of a hack in that we rewrite a string such as ``'@a'`` as
|
``'__pd_eval_local_a'`` by telling the tokenizer that ``__pd_eval_local_``
|
is a ``tokenize.OP`` and to replace the ``'@'`` symbol with it.
|
ú@)r, r- r r# r" r" r& Ú_replace_locals^ s
|
r1 c s fddS )z
|
Compose 2 callables.
|
c s | |S ©Nr" )ÚargsÚkwargs©ÚfÚgr" r& Ú<lambda>| ó z_compose2.<locals>.<lambda>r" r5 r" r5 r& Ú _compose2x s r: c G s t | dkstdtt| S )z&
|
Compose 2 or more callables.
|
é z.At least 2 callables must be passed to compose)ÚlenÚAssertionErrorr r: )Úfuncsr" r" r& Ú_compose s r? Ústr)Úsourcer c s, t stdt fddt| D ¡S )aÒ
|
Compose a collection of tokenization functions.
|
|
Parameters
|
----------
|
source : str
|
A Python source code string
|
f : callable
|
This takes a tuple of (toknum, tokval) as its argument and returns a
|
tuple with the same structure but possibly different elements. Defaults
|
to the composition of ``_rewrite_assign``, ``_replace_booleans``, and
|
``_replace_locals``.
|
|
Returns
|
-------
|
str
|
Valid Python source code
|
|
Notes
|
-----
|
The `f` parameter can be any callable that takes *and* returns input of the
|
form ``(toknum, tokval)``, where ``toknum`` is one of the constants from
|
the ``tokenize`` module and ``tokval`` is a string.
|
zf must be callablec 3 s | ]} |V qd S r2 r" ©Ú.0Úx©r6 r" r& Ú <genexpr>¦ s z _preparse.<locals>.<genexpr>)Úcallabler= r, Ú
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untokenizer ©rA r6 r" rE r& Ú _preparse s rJ c s fddS )zO
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Factory for a type checking function of type ``t`` or tuple of types.
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c s t | j S r2 )Ú
|
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issubclassÚastÚAST©rC Únoder" r" r& rF µ s
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Filter out AST nodes that are subclasses of ``superclass``.
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z _filter_nodes.<locals>.<genexpr>)Ú frozenset)r[ Z all_nodesZ
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node_namesr" rZ r& Ú _filter_nodes¼ s r] c C s | j S r2 )rY rM r" r" r& r8 Ä r9 r8 ZAssignÚModuleÚExprZYieldZ GeneratorExpZIfExpZDictCompZSetCompÚReprÚLambdaÚSetrT ZIsZIsNotz$cannot both support and not support zCallable[(Ellipsis, None)])Ú node_namer c s fdd}|S )zV
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Return a function that raises a NotImplementedError with a passed node name.
|
c s t d dd S )Nú'z' nodes are not implemented)ÚNotImplementedError)Úselfr3 r4 ©rc r" r& r6 s z _node_not_implemented.<locals>.fr" )rc r6 r" rg r& Ú_node_not_implemented s rh Ú_Tzset[str]z Callable[[type[_T]], type[_T]])Únodesr c s ddd fdd }|S )z
|
Decorator to disallow certain nodes from parsing. Raises a
|
NotImplementedError instead.
|
|
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|
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|
callable
|
ztype[_T])Úclsr c sB d| _ D ]2}t|}d| }| j |f7 _ t| || q
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Return a function to create an op class with its symbol already passed.
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|
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|
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|
callable
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c s t f||S )z
|
Return a partial function with an Op subclass with an operator already passed.
|
|
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|
)r )rf rV r3 r4 ©Úop_classÚ op_symbolr" r& r6 2 s z_op_maker.<locals>.fr" )rs rt r6 r" rr r& Ú _op_maker) s
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Decorator to add default implementation of ops.
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c sl ¡ D ]^\}}t| | d}t| | d}|D ]0}|| }|d k r4t||}t| d| | q4q| S )NZ_opsZ _op_nodes_maprl )ÚitemsrW ru rn )rk Z op_attr_namers ÚopsZops_mapÚopZop_nodeZmade_op©Ú
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zadd_ops.<locals>.fr" )r{ r6 r" rz r& Úadd_opsB s r| c @ s e Zd ZU dZeZded< eZe e
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e Z dZ eee e ZeZdZeeeeZejejejejejejejejiZded< efdd d
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|
Custom ast walker. Parsers of other engines should subclass this class
|
if necessary.
|
|
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|
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|
env : Scope
|
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|
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|
preparser : callable
|
z
|
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|
const_type)ZGtZLtZGtEZLtEÚEqÚNotEqÚInÚNotInZBitAndZBitOrÚAndÚOrZAddZSubZMultNZPowZFloorDivZMod)ZUAddZUSubZInvertÚNotztuple[str, ...]rm ÚNone©r c C s" || _ || _|| _|| _d | _d S r2 )ÚenvÚengineÚparserÚ preparserÚassigner©rf r r r r r" r" r& Ú__init__ s
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zBaseExprVisitor.visitc K s. t |jdkrtd|jd }| j|f|S )Nr; z#only a single expression is allowedr )r< Úbodyr r )rf rV r4 Úexprr" r" r& Ú visit_Module¡ s
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visit_Expr§ s zBaseExprVisitor.visit_Exprc C s |j }t|}t|r¬t|r¬|| jkr¬tt||f\}}tt||f\}} |s\|s\|s\| rh| j| }| r| j |j g¡}
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z&BaseExprVisitor._rewrite_membership_opNc C sR |d kr| j |jdd}|d kr0| j |jdd}| |||¡\}}}}||||fS )Nr¥ )Úsider¦ )r r¥ r¦ r§ )rf rV r¥ r¦ ry rs r" r" r& Ú_maybe_transform_eq_neÅ s z&BaseExprVisitor._maybe_transform_eq_nec C s t t j¡}|jrNt|drN|jsN|j|krN| j t |j¡¡}| || j¡}|jrt|dr|js|j|kr| j t |j¡¡}| || j¡}||fS )NrL )
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t | |S r2 )r )r» r¼ r" r" r& r8 r9 z+BaseExprVisitor.visit_Div.<locals>.<lambda>r" r r" r" r& Ú visit_Div s zBaseExprVisitor.visit_Divc K s | |j¡}| |j¡}||S r2 )r ry Úoperand)rf rV r4 ry rÁ r" r" r& Ú visit_UnaryOp s z BaseExprVisitor.visit_UnaryOpc K s | j |j| jf|S r2 )r¤ Úidr r r" r" r& Ú
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visit_Name# s zBaseExprVisitor.visit_Namer c K s | |j| j¡S r2 )r~ rL r r r" r" r& Úvisit_NameConstant& s z"BaseExprVisitor.visit_NameConstantc K s | |j| j¡S r2 ©r~ Únr r r" r" r& Ú visit_Num) s zBaseExprVisitor.visit_Numc K s | |j| j¡S r2 rÆ r r" r" r& Úvisit_Constant, s z BaseExprVisitor.visit_Constantc K s | j |j¡}| || j ¡S r2 )r r£ Úsr¤ ©rf rV r4 rX r" r" r& Ú visit_Str/ s zBaseExprVisitor.visit_Strc s* j fdd|jD ¡} | j ¡S )Nc s g | ]} |¡ jqS r" ©r r )rC r ©rf r" r& Ú
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