o ŀg@sdZddlmZddlmZddlmZddlZddlZddl m Z e r,ddl m Z m Z dZdd d Zd ddZd!ddZd"ddZd#ddZdS)$z6 :func:`~pandas.eval` source string parsing functions ) annotations)StringIO) iskeywordN) TYPE_CHECKING)HashableIteratordnamestrreturnc s|r t|s |SddtjDddddddd d d d fd d|D}d|}|s?td|d|S)a= Create valid Python identifiers from any string. Check if name contains any special characters. If it contains any special characters, the special characters will be replaced by a special string and a prefix is added. Raises ------ SyntaxError If the returned name is not a Python valid identifier, raise an exception. This can happen if there is a hashtag in the name, as the tokenizer will than terminate and not find the backtick. But also for characters that fall out of the range of (U+0001..U+007F). cSs$i|]\}}|dtj|dqS)_)tokentok_name).0chartokvalrS/var/www/html/myenv/lib/python3.10/site-packages/pandas/core/computation/parsing.py ,sz2create_valid_python_identifier..r _QUESTIONMARK__EXCLAMATIONMARK_ _DOLLARSIGN_ _EUROSIGN_ _DEGREESIGN_ _SINGLEQUOTE_ _DOUBLEQUOTE_) ?!$u€°'"csg|]}||qSr)get)rrspecial_characters_replacementsrr @sz2create_valid_python_identifier..BACKTICK_QUOTED_STRING_zCould not convert 'z' to a valid Python identifier.) isidentifierrtokenizeEXACT_TOKEN_TYPESitemsupdatejoin SyntaxError)r rr%rcreate_valid_python_identifiers* r0toktuple[int, str]cCs&|\}}|tkrtjt|fS||fS)a[ Clean up a column name if surrounded by backticks. Backtick quoted string are indicated by a certain tokval value. If a string is a backtick quoted token it will processed by :func:`_create_valid_python_identifier` so that the parser can find this string when the query is executed. In this case the tok will get the NAME tokval. Parameters ---------- tok : tuple of int, str ints correspond to the all caps constants in the tokenize module Returns ------- tok : Tuple[int, str] Either the input or token or the replacement values )BACKTICK_QUOTED_STRINGr*NAMEr0)r1toknumrrrrclean_backtick_quoted_toksIsr6rcCs>ztd|d}t|d}t|WSty|YSw)a Function to emulate the cleaning of a backtick quoted name. The purpose for this function is to see what happens to the name of identifier if it goes to the process of being parsed a Python code inside a backtick quoted string and than being cleaned (removed of any special characters). Parameters ---------- name : hashable Name to be cleaned. Returns ------- name : hashable Returns the name after tokenizing and cleaning. Notes ----- For some cases, a name cannot be converted to a valid Python identifier. In that case :func:`tokenize_string` raises a SyntaxError. In that case, we just return the name unmodified. If this name was used in the query string (this makes the query call impossible) an error will be raised by :func:`tokenize_backtick_quoted_string` instead, which is not caught and propagates to the user level. `)tokenize_stringnextr0r/)r tokenizedrrrrclean_column_namecs   r<token_generatorIterator[tokenize.TokenInfo]source string_startintcCs8|D]\}}}}}|dkr|d}nqt|||fS)a Creates a token from a backtick quoted string. Moves the token_generator forwards till right after the next backtick. Parameters ---------- token_generator : Iterator[tokenize.TokenInfo] The generator that yields the tokens of the source string (Tuple[int, str]). The generator is at the first token after the backtick (`) source : str The Python source code string. string_start : int This is the start of backtick quoted string inside the source string. Returns ------- tok: Tuple[int, str] The token that represents the backtick quoted string. The integer is equal to BACKTICK_QUOTED_STRING (100). r7r8)r3)r=r?r@r rstart string_endrrrtokenize_backtick_quoted_strings rDIterator[tuple[int, str]]c cst|j}t|}|D]4\}}}}}|dkrr?r r@rAr r2)r?r r rE)__doc__ __future__riorkeywordrr r*typingrcollections.abcrrr3r0r6r<rDr9rrrrs      3  %"