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Example:: x = 1 this_env = EvalEnvironment.capture() assert this_env.namespace["x"] == 1 def child_func(): return EvalEnvironment.capture(1) this_env_from_child = child_func() assert this_env_from_child.namespace["x"] == 1 Example:: # This function can be used like: # my_model(formula_like, data) # -> evaluates formula_like in caller's environment # my_model(formula_like, data, eval_env=1) # -> evaluates formula_like in caller's caller's environment # my_model(formula_like, data, eval_env=my_env) # -> evaluates formula_like in environment 'my_env' def my_model(formula_like, data, eval_env=0): eval_env = EvalEnvironment.capture(eval_env, reference=1) return model_setup_helper(formula_like, data, eval_env) This is how :func:`dmatrix` works. .. versionadded: 0.2.0 The ``reference`` argument. zWParameter 'eval_env' must be either an integer or an instance of patsy.EvalEnvironment.rBNzcall-stack is not that deep!)rKnumbersIntegral TypeErrorinspect currentframerange ValueErrorf_backf_locals f_globalsf_codeco_flagsrt)clseval_env referencedepthframeis rcapturezEvalEnvironment.capturesZ h $ $ HO '"2 3 3 Hy(EEGHH H$&& 519%% % %E$%CDDD 38|,/@@BBIIIIs AB..B1ct|jtfd|D}t|g|jS)zWCreates a new, flat EvalEnvironment that contains only the variables specified.c3,K|]}||fVdSr r?).0namevlds r z)EvalEnvironment.subset..s,::DtSY'::::::r)rrudictrr)r#namesnew_nsrs @rsubsetzEvalEnvironment.subsetsKD,--::::E:::::x444rc$d|jDS)Nc,g|]}t|Sr?)r_)rns r z2EvalEnvironment._namespace_ids..s000!1000r)rur:s r_namespace_idszEvalEnvironment._namespace_idss00t/0000rct|to9|j|jko)||kSr )rKrrrr#others r__eq__zEvalEnvironment.__eq__sM5/22DJ%+-D''))U-A-A-C-CC Erc||k Sr r?rs r__ne__zEvalEnvironment.__ne__5=  rcxtt|jt|fSr )hashrrtuplerr:s r__hash__zEvalEnvironment.__hash__s7_Z4..0011344 4rN)r)rr)r9r<r=__doc__r%propertyrxr{r} classmethodrrrrrrrr>r?rrrrs //X/ ***&0 A A A AAAA[AF555111EEE !!!444 LLLrc"d}tSNrB_b)_as rrr  B 44Krc"d}tSr_crs rrr rrc :d}ttdtdtddtdtddgS)NrBr)rrCrrrs rrrs| B  # # % %  # #A & &  # #A & &  # #A # 3 3  # #A & &  # #Aq ) )  rct\}}}}}}d|jvsJd|jvsJd|jvsJd|jvsJd|jvsJd|jvsJ|jddksJ|jddksJ|jddksJ|jddksJ|jddksJ|jddksJ|jdtusJ|jdtusJddl}|t t jdt ||usJ|tt jdtt dS) N&test_EvalEnvironment_capture_namespacerrBrrri@Bg333333?) rrxrrIrJrrrrr)c0rGb1b2a1a2rIs rrrsDDB2r2r 3r| CCCC 3q{ BBBB 3r| CCCC 3r| CCCC 3r| CCCC 3r| CCCC <  """" ;t  !!!! <  """" <  """" <  """" <  """" <  #### <  ####MMM MM*o5w???  " "2 & &" ,,,, MM)_4c:::..0011111rctjdkrd}nd}tt|j}|t zsJd}t |dddd}td d d }t|}tj |||d j d dksJ|dj d dksJd |dj vsJ|d j t zdksJ|dj t zdksJ|dj t zdksJt d|d|zdddd}tj |||d j d dksJ|dj d dksJd |dj vsJ|d j t z|ksJ|dj t zdksJ|dj t z|ksJdS)NrDbarry_as_FLUFLdivisionzdef f(): in_f = 'hi from f' global RETURN_INNER, RETURN_OUTER, RETURN_INNER_FROM_OUTER RETURN_INNER = EvalEnvironment.capture(0) RETURN_OUTER = call_capture_0() RETURN_INNER_FROM_OUTER = call_capture_1() f() z execrrBc6tdSrrr?rrz4test_EvalEnvironment_capture_flags..F_%<%.Grr)rcall_capture_0call_capture_1 RETURN_INNERin_fz hi from fRETURN_INNER_FROM_OUTER RETURN_OUTERzfrom __future__ import  z) rrrrrrtr~rrrMexec_rxr) TEST_FEATURE test_flagsourcer`envenv2code2s r"test_EvalEnvironment_capture_flagsr4sI 4"( !  L11?I ( ((((F 6?FAq 9 9D-????  C 99DIdC ~  ( 0K ???? ( ) 3F ;{ JJJJ ^,6 6666 ~  $'8 8A ==== ~  $'8 8A ==== ( ) /2C Cq HHHH GlllD%vq! 5 5EIeT   )& 1[ @@@@ ) * 4V < KKKK n-7 7777   %(9 9Y FFFF   %(9 9Q >>>> ) * 03D D QQQQQQrctddig}|ddksJ|dddidksJddl}|t|jdd }td}|dd ksJ|d d d }|ddksJ|dd ksJdS) NrArBz2 * arCrrz2 * brDrHrE)rr}rIrJ NameErrorrr{)rrIrArenv3s r#test_EvalEnvironment_eval_namespacer]s C8* % %C 88G   !!!! 88Gc1X8 6 6! ;;;;MMM MM)SXw/// A  " "1 % %D 99W   """"  # #"1$5$5 6 6D 99W   """" 99W   """"""rcddl}tjdkrEtjj}|t zsJtddigd}|ddksJ| t|jd| dgj dksJ| d d ij dksJtddig|}|ddksJ| t|jd| dgj |ksJ| d d ij |ksJdStjj}|t zsJtddigd}|d d cxkrd ksnJ| dgj dksJ| d d ij dksJtddig|}|d d cxkrd ksnJ| dgj |k| d d ij |ksJdS)NrrrA )rza != 0Tza <> 0rFrHza / 2g@)rIrrrrrrtrr}rJ SyntaxErrorrrr{r)rIrrrs rtest_EvalEnvironment_eval_flagsrksMMM 4G-; ,,,,,Ryk333xx!!T)))) k38X666zz3%  &!++++''b 228A====b {)<<<yy""d**** k49h777{{C5!!'94444((#r339YFFFFFF'5 ,,,,,Ryk333xx  G0000q000000zz3%  &!++++''b 228A====b {)<<<yy!![5555A555555 SE I--((#r339YFFFFFFrctddiddiddig}|dg}|ddksJddl}|t |jd|t |jd|ddg}|dd ksJ|t |jddS) NrArBrFrCrGrDrzb * cr)rrr}rIrJr)rsubset_arI subset_bcs rtest_EvalEnvironment_subsetrs C8c1XQx8 9 9Czz3%  H ==   """"MMM MM)X]C000 MM)X]C000 C:&&I >>' " "a '''' MM)Y^S11111rctd}td}||ksJt|t|ksJd}|}|}||ksJdS)Nrc6tdSrrr?rrrz)test_EvalEnvironment_eq..s 7 7 : :r)rrr)env1rcapture_local_envrenv4s rtest_EvalEnvironment_eqrs  " "1 % %D  " "1 % %D 4< ::d ####::    D    D 4<rzfrom patsy.builtins import *cVeZdZd dZdZdZdZdZdZdZ d Z d Z d Z d Z eZdS)rNc<t||_||_dS)a/A factor class that executes arbitrary Python code and supports stateful transforms. :arg code: A string containing a Python expression, that will be evaluated to produce this factor's value. 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