;ò ÎÑAHc@s7dZdkZdkZdkZdkZdkZdklZdkl Z l Z l Z dddddgZ dei fd „ƒYZd „Zdefd „ƒYZdefd „ƒYZdefd „ƒYZdeefd„ƒYZdefd„ƒYZdeefd„ƒYZdeefd„ƒYZdS(sŸModule for interactive demos using IPython. This module implements a few classes for running Python scripts interactively in IPython for demonstrations. With very simple markup (a few tags in comments), you can control points where the script stops executing and returns control to IPython. Provided classes ================ The classes are (see their docstrings for further details): - Demo: pure python demos - IPythonDemo: demos with input to be processed by IPython as if it had been typed interactively (so magics work, as well as any other special syntax you may have added via input prefilters). - LineDemo: single-line version of the Demo class. These demos are executed one line at a time, and require no markup. - IPythonLineDemo: IPython version of the LineDemo class (the demo is executed a line at a time, but processed via IPython). - ClearMixin: mixin to make Demo classes with less visual clutter. It declares an empty marquee and a pre_cmd that clears the screen before each block (see Subclassing below). - ClearDemo, ClearIPDemo: mixin-enabled versions of the Demo and IPythonDemo classes. Subclassing =========== The classes here all include a few methods meant to make customization by subclassing more convenient. Their docstrings below have some more details: - marquee(): generates a marquee to provide visible on-screen markers at each block start and end. - pre_cmd(): run right before the execution of each block. - post_cmd(): run right after the execution of each block. If the block raises an exception, this is NOT called. Operation ========= The file is run in its own empty namespace (though you can pass it a string of arguments as if in a command line environment, and it will see those as sys.argv). But at each stop, the global IPython namespace is updated with the current internal demo namespace, so you can work interactively with the data accumulated so far. By default, each block of code is printed (with syntax highlighting) before executing it and you have to confirm execution. This is intended to show the code to an audience first so you can discuss it, and only proceed with execution once you agree. There are a few tags which allow you to modify this behavior. The supported tags are: # stop Defines block boundaries, the points where IPython stops execution of the file and returns to the interactive prompt. You can optionally mark the stop tag with extra dashes before and after the word 'stop', to help visually distinguish the blocks in a text editor: # --- stop --- # silent Make a block execute silently (and hence automatically). Typically used in cases where you have some boilerplate or initialization code which you need executed but do not want to be seen in the demo. # auto Make a block execute automatically, but still being printed. Useful for simple code which does not warrant discussion, since it avoids the extra manual confirmation. # auto_all This tag can _only_ be in the first block, and if given it overrides the individual auto tags to make the whole demo fully automatic (no block asks for confirmation). It can also be given at creation time (or the attribute set later) to override what's in the file. While _any_ python file can be run as a Demo instance, if there are no stop tags the whole file will run in a single block (no different that calling first %pycat and then %run). The minimal markup to make this useful is to place a set of stop tags; the other tags are only there to let you fine-tune the execution. This is probably best explained with the simple example file below. You can copy this into a file named ex_demo.py, and try running it via: from IPython.demo import Demo d = Demo('ex_demo.py') d() <--- Call the d object (omit the parens if you have autocall set to 2). Each time you call the demo object, it runs the next block. The demo object has a few useful methods for navigation, like again(), edit(), jump(), seek() and back(). It can be reset for a new run via reset() or reloaded from disk (in case you've edited the source) via reload(). See their docstrings below. Example ======= The following is a very simple example of a valid demo file. #################### EXAMPLE DEMO ############################### '''A simple interactive demo to illustrate the use of IPython's Demo class.''' print 'Hello, welcome to an interactive IPython demo.' # The mark below defines a block boundary, which is a point where IPython will # stop execution and return to the interactive prompt. The dashes are actually # optional and used only as a visual aid to clearly separate blocks while editing the demo code. # stop x = 1 y = 2 # stop # the mark below makes this block as silent # silent print 'This is a silent block, which gets executed but not printed.' # stop # auto print 'This is an automatic block.' print 'It is executed without asking for confirmation, but printed.' z = x+y print 'z=',x # stop # This is just another normal block. print 'z is now:', z print 'bye!' ################### END EXAMPLE DEMO ############################ N(sParser(smarquees file_readsfile_readlinessDemos IPythonDemosLineDemosIPythonLineDemos DemoErrorcBstZRS(N(s__name__s __module__(((s=/u/d/b/dbachman/=/lib/python2.3/site-packages/IPython/demo.pys DemoError°scCstid|tiƒSdS(Ns^\s*#\s+\s+%s\s*$(srescompilesmarks MULTILINE(smark((s=/u/d/b/dbachman/=/lib/python2.3/site-packages/IPython/demo.pysre_mark²scBsïtZedƒZedƒZedƒZedƒZded„Zd„Z d„Z d „Z d „Z d „Z d d „Zd d„Zd„Zed„Zed„Zd„Zd„Zed„Zdddd„Zd„Zd„ZRS(Ns-?\s?stop\s?-?ssilentsautosauto_allscCsr||_|gti|ƒ|_||_ti|_ ti |_ ti |_ ti|_t|_|iƒdS(sMake a new demo object. To run the demo, simply call the object. See the module docstring for full details and an example (you can use IPython.Demo? in IPython to see it). Inputs: - fname = filename. Optional inputs: - arg_str(''): a string of arguments, internally converted to a list just like sys.argv, so the demo script can see a similar environment. - auto_all(None): global flag to run all blocks automatically without confirmation. This attribute overrides the block-level tags and applies to the whole demo. It is an attribute of the object, and can be changed at runtime simply by reassigning it to a boolean value. N(sfnamesselfsshlexssplitsarg_strssys_argvsauto_alls __IPYTHON__suser_nssip_nss pycolorizes ip_colorizes showtracebacks ip_showtbsrunliness ip_runlinessshellsreload(sselfsfnamesarg_strsauto_all((s=/u/d/b/dbachman/=/lib/python2.3/site-packages/IPython/demo.pys__init__¼s       csÒtˆiƒˆ_gi}ˆiiˆiƒD]!}|o||i ƒƒq/q/~}gi}|D]"}|t ˆi i |ƒƒƒqg~ˆ_gi}|D]"}|t ˆii |ƒƒƒq£~ˆ_ˆitjo#t ˆii |dƒƒˆ_nt ˆiƒˆ_g}‡d†}xLt|ƒD]>\}}ˆi|o|i||ƒƒq5|i|ƒq5Wˆiid|dƒ|dõssN(s file_readsselfsfnamessrcsappends_[1]sre_stopssplitsbsstripssrc_bsbools re_silentsfindalls_silentsre_autos_autosauto_allsNones re_auto_alls src_blockss auto_strips enumeratesissubslensnblockssmaps ip_colorizessrc_blocks_coloredsreset(sselfs auto_stripsbsissrc_bs src_blockss_[1]((sselfs=/u/d/b/dbachman/=/lib/python2.3/site-packages/IPython/demo.pysreloadäs(G<<#   cCsh|_t|_d|_dS(s8Reset the namespace and seek pointer to restart the demoiN(sselfsuser_nssFalsesfinisheds block_index(sself((s=/u/d/b/dbachman/=/lib/python2.3/site-packages/IPython/demo.pysresets  cCs5|djp ||ijotd|ƒ‚ndS(Nisinvalid block index %s(sindexsselfsnblockss ValueError(sselfsindex((s=/u/d/b/dbachman/=/lib/python2.3/site-packages/IPython/demo.pys_validate_index scCsF|tjo$|io dGHtSn|i}n|i|ƒ|SdS(sjGet the current block index, validating and checking status. Returns None if the demo is finisheds4Demo finished. Use reset() if you want to rerun it.N(sindexsNonesselfsfinisheds block_indexs_validate_index(sselfsindex((s=/u/d/b/dbachman/=/lib/python2.3/site-packages/IPython/demo.pys _get_indexs    cCsA|djo|i|}n|i|ƒ||_t|_dS(s¨Move the current seek pointer to the given block. You can use negative indices to seek from the end, with identical semantics to those of Python lists.iN(sindexsselfsnblockss_validate_indexs block_indexsFalsesfinished(sselfsindex((s=/u/d/b/dbachman/=/lib/python2.3/site-packages/IPython/demo.pysseeks    icCs|i|i|ƒdS(s5Move the seek pointer back num blocks (default is 1).N(sselfsseeks block_indexsnum(sselfsnum((s=/u/d/b/dbachman/=/lib/python2.3/site-packages/IPython/demo.pysback*scCs|i|i|ƒdS(szJump a given number of blocks relative to the current one. The offset can be positive or negative, defaults to 1.N(sselfsseeks block_indexsnum(sselfsnum((s=/u/d/b/dbachman/=/lib/python2.3/site-packages/IPython/demo.pysjump.scCs|idƒ|ƒdS(s4Move the seek pointer back one block and re-execute.iN(sselfsback(sself((s=/u/d/b/dbachman/=/lib/python2.3/site-packages/IPython/demo.pysagain4s cCs±|i|ƒ}|tjodSn|djo|d8}n|ii|i|ƒ}|iii |dƒt |ƒ}||i|<|i |ƒ|i |<||_|ƒdS(sÂEdit a block. If no number is given, use the last block executed. This edits the in-memory copy of the demo, it does NOT modify the original source file. If you want to do that, simply open the file in an editor and use reload() when you make changes to the file. This method is meant to let you change a block during a demonstration for explanatory purposes, without damaging your original script.Nii(sselfs _get_indexsindexsNonesshells mktempfiles src_blockssfilenameshooksseditors file_reads new_blocks ip_colorizessrc_blocks_coloreds block_index(sselfsindexsfilenames new_block((s=/u/d/b/dbachman/=/lib/python2.3/site-packages/IPython/demo.pysedit9s      cCsu|i|ƒ}|tjodSn|id|i||i|dfƒGHtii |i |ƒtii ƒdS(sShow a single block on screenNs<%s> block # %s (%s remaining)i( sselfs _get_indexsindexsNonesmarqueesfnamesnblocksssyssstdoutswritessrc_blocks_coloredsflush(sselfsindex((s=/u/d/b/dbachman/=/lib/python2.3/site-packages/IPython/demo.pysshowVs )cCs¨|i}|i}|i}|i}xpt|iƒD]_\}}||o$|d||||dfƒGHn!|d||||dfƒGH|Gq4Wt i i ƒdS(s*Show entire demo on screen, block by blocks%<%s> SILENT block # %s (%s remaining)is<%s> block # %s (%s remaining)N( sselfsfnamesnblockss_silentssilentsmarquees enumeratessrc_blocks_coloredsindexsblockssyssstdoutsflush(sselfsindexssilentsmarqueesfnamesnblockssblock((s=/u/d/b/dbachman/=/lib/python2.3/site-packages/IPython/demo.pysshow_allbs      $ cBs||iUdS(s/Execute a string with one or more lines of codeN(ssourcesselfsuser_ns(sselfssource((s=/u/d/b/dbachman/=/lib/python2.3/site-packages/IPython/demo.pysrunlinessscCs¯|i|ƒ}|tjodSny |i}|i|}|id7_|i|o$|d||i |dfƒGHnr|i ƒ|i |ƒ|i p |i |o|dƒGHn4|dƒGtƒiƒ}|o|dƒGHdSnz0ti}|it_|i|ƒ|iƒWd|t_XWn|id|iƒnX|ii|iƒ|i|i jo;|idƒ}|oH|GH|id ƒGHnt|_ndS( sbrun a block of the demo. If index is given, it should be an integer >=1 and <= nblocks. This means that the calling convention is one off from typical Python lists. The reason for the inconsistency is that the demo always prints 'Block n/N, and N is the total, so it would be very odd to use zero-indexing here.Nis*Executing silent block # %s (%s remaining)soutput:s(Press to quit, to execute...sBlock NOT executedsfilenames END OF DEMOs$Use reset() if you want to rerun it.(sselfs _get_indexsindexsNonesmarquees src_blockss next_blocks block_indexs_silentsnblocksspre_cmdsshowsauto_alls_autos raw_inputsstripsansssyssargvs save_argvssys_argvsrunlinesspost_cmds ip_showtbsfnamesip_nssupdatesuser_nssmq1sTruesfinished(sselfsindexsmarquees save_argvsmq1sanss next_block((s=/u/d/b/dbachman/=/lib/python2.3/site-packages/IPython/demo.pys__call__xsH   $       iNs*cCst|||ƒSdS(s0Return the input string centered in a 'marquee'.N(smarqueestxtswidthsmark(sselfstxtswidthsmark((s=/u/d/b/dbachman/=/lib/python2.3/site-packages/IPython/demo.pysmarquee®scCsdS(s*Method called before executing each block.N((sself((s=/u/d/b/dbachman/=/lib/python2.3/site-packages/IPython/demo.pyspre_cmd²scCsdS(s)Method called after executing each block.N((sself((s=/u/d/b/dbachman/=/lib/python2.3/site-packages/IPython/demo.pyspost_cmd¶s(s__name__s __module__sre_marksre_stops re_silentsre_autos re_auto_allsNones__init__sreloadsresets_validate_indexs _get_indexsseeksbacksjumpsagainseditsshowsshow_allsrunliness__call__smarqueespre_cmdspost_cmd(((s=/u/d/b/dbachman/=/lib/python2.3/site-packages/IPython/demo.pysDemoµs*    ( #          6 cBstZdZd„ZRS(sDClass for interactive demos with IPython's input processing applied. This subclasses Demo, but instead of executing each block by the Python interpreter (via exec), it actually calls IPython on it, so that any input filters which may be in place are applied to the input block. If you have an interactive environment which exposes special input processing, you can use this class instead to write demo scripts which operate exactly as if you had typed them interactively. The default Demo class requires the input to be valid, pure Python code. cCs|ii|ƒdS(s/Execute a string with one or more lines of codeN(sselfsshellsrunlinesssource(sselfssource((s=/u/d/b/dbachman/=/lib/python2.3/site-packages/IPython/demo.pysrunlinesÈs(s__name__s __module__s__doc__srunlines(((s=/u/d/b/dbachman/=/lib/python2.3/site-packages/IPython/demo.pys IPythonDemo»s cBstZdZd„ZRS(ssDemo where each line is executed as a separate block. The input script should be valid Python code. This class doesn't require any markup at all, and it's meant for simple scripts (with no nesting or any kind of indentation) which consist of multiple lines of input to be executed, one at a time, as if they had been typed in the interactive prompt.cCsÌgi}t|iƒD]!}|iƒo||ƒqq~}t|ƒ}t i i t|iƒƒ|_ tg||_tg||_t|_||_ ||_t|i|iƒ|_|iƒdS(s-Reload source from disk and initialize state.N(sappends_[1]sfile_readlinessselfsfnameslsstripssrc_bslensnblockssosslinesepsjoinssrcsFalses_silentsTrues_autosauto_alls src_blockssmaps ip_colorizessrc_blocks_coloredsreset(sselfssrc_bsls_[1]snblocks((s=/u/d/b/dbachman/=/lib/python2.3/site-packages/IPython/demo.pysreload×sA    (s__name__s __module__s__doc__sreload(((s=/u/d/b/dbachman/=/lib/python2.3/site-packages/IPython/demo.pysLineDemoÍs cBstZdZRS(sBVariant of the LineDemo class whose input is processed by IPython.(s__name__s __module__s__doc__(((s=/u/d/b/dbachman/=/lib/python2.3/site-packages/IPython/demo.pysIPythonLineDemoês s ClearMixincBs)tZdZdddd„Zd„ZRS(sÐUse this mixin to make Demo classes with less visual clutter. Demos using this mixin will clear the screen before every block and use blank marquees. Note that in order for the methods defined here to actually override those of the classes it's mixed with, it must go /first/ in the inheritance tree. For example: class ClearIPDemo(ClearMixin,IPythonDemo): pass will provide an IPythonDemo class with the mixin's features. siNs*cCsdSdS(s7Blank marquee that returns '' no matter what the input.sN((sselfstxtswidthsmark((s=/u/d/b/dbachman/=/lib/python2.3/site-packages/IPython/demo.pysmarqueeþscCstidƒdS(sVMethod called before executing each block. This one simply clears the screen.sclearN(sosssystem(sself((s=/u/d/b/dbachman/=/lib/python2.3/site-packages/IPython/demo.pyspre_cmds(s__name__s __module__s__doc__smarqueespre_cmd(((s=/u/d/b/dbachman/=/lib/python2.3/site-packages/IPython/demo.pys ClearMixinïs s ClearDemocBstZRS(N(s__name__s __module__(((s=/u/d/b/dbachman/=/lib/python2.3/site-packages/IPython/demo.pys ClearDemo ss ClearIPDemocBstZRS(N(s__name__s __module__(((s=/u/d/b/dbachman/=/lib/python2.3/site-packages/IPython/demo.pys ClearIPDemo s(s__doc__s exceptionssossresshlexssyssIPython.PyColorizesParsersIPython.genutilssmarquees file_readsfile_readliness__all__s Exceptions DemoErrorsre_marksobjectsDemos IPythonDemosLineDemosIPythonLineDemos ClearMixins ClearDemos ClearIPDemo(sfile_readliness ClearDemos ClearMixins__all__smarquees IPythonDemos file_readsParserssyssres ClearIPDemosIPythonLineDemos DemoErrorsshlexsDemos exceptionssLineDemosossre_mark((s=/u/d/b/dbachman/=/lib/python2.3/site-packages/IPython/demo.pys?›s$       ÿ