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If the ``.ipynb`` originally had a trailing newline, it'll be preserved. rrFcells cell_typeNrrFsourcerNT)keependsrW)indent ensure_ascii) rPjsonloadsrerjoinr_ splitlinesdumps) r?rrtrailing_newlinemodifiedr`cellrprHr@rdrdrerODs.    rOcCs8t|||d}||kr|rt|||}t|||dS|S)aReformat a string and return new contents. `mode` determines formatting options, such as how many characters per line are allowed. Example: >>> import black >>> print(black.format_str("def f(arg:str='')->None:...", mode=black.Mode())) def f(arg: str = "") -> None: ... A more complex example: >>> print( ... black.format_str( ... "def f(arg:str='')->None: hey", ... mode=black.Mode( ... target_versions={black.TargetVersion.PY36}, ... line_length=10, ... string_normalization=False, ... is_pyi=False, ... ), ... ), ... ) def f( arg: str = '', ) -> None: hey rJ)_format_str_oncerL)r?rrr@rdrdrerPds   rPcs<t||j}g}|jr|jn t|}t||dfddtjhD}t|||r2t||t ||d}t |d}fddtj tj hD} d} | |D]} || } || t| || dD] } | jt| qdqQ|rwd|d_g} |D] } | | q{| st|d \}}}d |vr|Sd Sd | S) Nfuture_importsch|] }t|r|qSrdr<rxfeaturerrdre  z#_format_str_once..)rfeaturesrVcrwrdrxryr{rdrer|r}rrrErrF)rIlstriprget_future_importsdetect_target_versionsr9PARENTHESIZED_CONTEXT_MANAGERSrrMr3r5TRAILING_COMMA_IN_CALLTRAILING_COMMA_IN_DEFvisitmaybe_empty_linesappendr4 content_linesrwafterextend all_linesr1encodern)r?rrsrc_node dst_blocksrvcontext_manager_featuresline_generatoreltsplit_line_featuresblock current_lineliner@normalized_content_r'rdr{rertsJ             rtcCst|}t|j\}}|sd|dfSd|dddkr dnd}|dt||}|||fWdS1s?wYdS)zReturn a tuple of (decoded_contents, encoding, newline). `newline` is either CRLF or LF but `decoded_contents` is decoded with universal newlines (i.e. only contains LF). rFrs rNz )r6BytesIOtokenizedetect_encodingr0seekr7r)rpsrcbufr&rr'tiowrdrdrer1s    $r1runodervc Cst}|r|dd|DO}|D]}t|rP|jdd}|dvrO|tjtj|vrOt|jD]\}}|j||d drN|tjnq4qt |r`d|jvr_|tj q|j tjkr||jr{|jj tjtjtjhvr{|tjq|j tjkr|tjq|j tjkrt|jdkrt|jds|tjq|j tjtjhvr|jr|jd j tjkr|j tjkrtj}ntj}|jD]"}|j t vr|||j tj!kr|jD] } | j t vr||qqq|j tj"tj#hvrt|jdkr|jdj tj$krt%d d |jdjDr|tj&q|j tj'kr>t|jd kr>|jd j tj$kr>|tj(q|j tj)krt|jdkr|jdj tj*kr|jdj} t| d kr| dj tj+kr| dj tj,kr| dj tj-kr|tj.q|j tj/kr|tj0q|j tj1krt|jdkr|jdj tj2kr|tj3q|j tj4tj5hvrt%dd |jDr|tj6q|j tj7krt|jd kr|jdj tj8kr|tj6q|j tj9tj:fvr|tj;q|S)aYReturn a set of (relatively) new Python features used in this file. Currently looking for: - f-strings; - self-documenting expressions in f-strings (f"{x=}"); - underscores in numeric literals; - trailing commas after * or ** in function signatures and calls; - positional only arguments in function signatures and lambdas; - assignment expression; - relaxed decorator syntax; - usage of __future__ flags (annotations); - print / exec statements; - parenthesized context managers; - match statements; - except* clause; - variadic generics; cSsh|] }|tvrt|qSrd)r7)rx future_importrdrdrer|s z$get_features_used..NrX>F"F'f"f'FRRFfrrfrW=rrcs|] }|jtjkVqdSr^rrA star_exprrxchildrdrdrerS&sz$get_features_used..rZrYrcsrr^rrrdrdrerSIs  )NUMERIC_UNDERSCORESrrSSLASHparentrA typedargslistarglist varargslistPOS_ONLY_ARGUMENTS COLONEQUALASSIGNMENT_EXPRESSIONS decoratorrchildrenr?RELAXED_DECORATORSCOMMArrr=argument return_stmt yield_exprtestlist_star_exprrTUNPACKING_ON_FLOW annassignANN_ASSIGN_EXTENDED_RHS with_stmtatomLPAR testlist_gexpRPARr match_stmtPATTERN_MATCHING except_clauseSTAR EXCEPT_STAR subscriptlisttrailerVARIADIC_GENERICS tname_starr type_stmt typeparams TYPE_PARAMS) rrvr~n value_headspan_begspan_endrzchargch atom_childrenrdrdreget_features_useds                        rcst||dfddtDS)z5Detect the version to target based on the nodes used.rucsh|] }t|kr|qSrd)r8)rxrr~rdrer|`sz)detect_target_versions..)rr;)rrvrdrrer[s  rcst}dttdttddfffdd |jD]W}|jtjkr#|S|jd}t |t rGt |jdkrD|jt j krD|jdjt jkrDq|S|jtjkrm|jd}t |t r\|jd kr_|S|t|jd dO}q|S|S) z/Return a set of __future__ imports in the file.rr]Nc3s|D]G}t|tr|jtjkr|jVq|jtjkr8|jd}t|ts)Jd|jtjks3Jd|jVq|jtj krG|jEdHqt ddS)NrzInvalid syntax parsing imports) rtrTrrSNAMErorAimport_as_namerimport_as_namesAssertionError)rr orig_nameget_imports_from_childrenrdreris      z5get_future_imports..get_imports_from_childrenrrXrW __future__rY)rrr2r rwrrrA simple_stmtrtrTrrSSTRINGNEWLINE import_fromro)rimportsr first_child module_namerdrreres,$     rrHc Cszt|}Wnty}z td|d|d}~wwzt|}Wn#tyE}ztdt|j|}td|d|dd}~wwdt|}dt|}||kritt ||dd }td |ddS) z:Raise AssertionError if `src` and `dst` aren't equivalent.zCcannot use --safe with this file; failed to parse source file AST: z~ This could be caused by running Black with an older Python version that does not support new syntax used in your source file.NrFz-INTERNAL ERROR: Black produced invalid code: ze. Please report a bug on https://github.com/psf/black/issues. This invalid output might be helpful: rrprHzINTERNAL ERROR: Black produced code that is not equivalent to the source. Please report a bug on https://github.com/psf/black/issues. This diff might be helpful: ) rJrrrDrnr format_tb __traceback__rKrC)rprHsrc_astrdst_astlog src_ast_str dst_ast_strrdrdrerKsJ  rKcCs^|rt|||}t|||d}||kr-tt|t||ddt||dd}td|ddS)zDRaise AssertionError if `dst` reformats differently the second time.rJrhz first passz second passzINTERNAL ERROR: Black produced different code on the second pass of the formatter. Please report a bug on https://github.com/psf/black/issues. This diff might be helpful: N)rLrtrDrwrCr)rprHrrnewdstrrdrdrerLs"   rLccs dVdS)zWReturn an empty context manager. To be used like `nullcontext` in Python 3.7. Nrdrdrdrdrer5s r5cCs(ttddrddlm}|tdS)NfrozenFrfreeze_support)getattrr8multiprocessingrrrrdrdre patched_mains   r__main__)r]N)r6rlplatformrr8rr contextlibr dataclassesrrrenumr json.decoderrpathlibrtypingr r r r r rrrrrrrrrr click.corermypy_extensionsrpathspecrpathspec.patterns.gitwildmatchr_black_versionrr black.cacherblack.commentsr black.constrrr r! black.filesr"r#r$r%r&r'r(r)r*black.handle_ipynb_magicsr+r,r-r.r/r0r1 black.linegenr2r3r4 black.linesr5r6 black.moder7r8r9r:r;r< black.nodesr=r>r?r@rA black.outputrBrCrDrErFrG black.parsingrHrIrJrK black.rangesrLrMrN black.reportrOrPrQ black.transrRblib2to3.pgen2rSblib2to3.pytreerTrU__file__rCOMPILEDrw FileContentEncodingNewLinerVFileModeContext ParameterrOptionrrrcommandoptionintChoicernsortedIntRangeversion_optionpython_implementationpython_versionr pass_contextrlrrrrrrjrrrMr2rUr_rerOrPrtbytesr1rrrrKrLr5rrgrdrdrdres     @       ,$        @                                 FE       _    < G 9  % ! , 3      2"