B ˜‘[× ã@sFdZddlmZmZddlZddlmZe d¡Zdd„Z dd „Z dS) z5 A few practical conventions common to all printers. é)Úprint_functionÚdivisionN)ÚIterablez^([a-zA-Z]+)([0-9]+)$c CsTt|ƒdkr|ggfSd}d}g}g}xú|t|ƒkr |d}|||d…dkrZ|d7}| d|¡}|dkrvt|ƒ}| d|¡}|dkr’t|ƒ}t||ƒ}|||…} |}|dkrº| }q(|  d¡rØ| | dd…¡q(|  d¡rö| | dd…¡q(|  d¡r| | dd…¡q(tdƒ‚q(Wt |¡} | rJ|  ¡\}} |  d| ¡|||fS) aSplit a symbol name into a name, superscripts and subscripts The first part of the symbol name is considered to be its actual 'name', followed by super- and subscripts. Each superscript is preceded with a "^" character or by "__". Each subscript is preceded by a "_" character. The three return values are the actual name, a list with superscripts and a list with subscripts. >>> from sympy.printing.conventions import split_super_sub >>> split_super_sub('a_x^1') ('a', ['1'], ['x']) >>> split_super_sub('var_sub1__sup_sub2') ('var', ['sup'], ['sub1', 'sub2']) rNééÚ__ú^Ú_zThis should never happen.) ÚlenÚfindÚminÚ startswithÚappendÚ RuntimeErrorÚ_name_with_digits_pÚmatchÚgroupsÚinsert) ÚtextÚposÚnameZsupersZsubsÚstartZpos_hatZpos_uscZpos_nextÚpartÚmÚsub©rú9lib/python3.7/site-packages/sympy/printing/conventions.pyÚsplit_super_subsB             rcCs6t|jtƒstt|jƒƒdkStdd„|jDƒƒdkS)a@Return whether a partial derivative symbol is required for printing This requires checking how many free variables there are, filtering out the ones that are integers. Some expressions don't have free variables. In that case, check its variable list explicitly to get the context of the expression. rcss|]}|j VqdS)N)Ú is_integer)Ú.0Úsrrrú Ssz#requires_partial..)Ú isinstanceZ free_symbolsrr ÚsetZ variablesÚsum)ÚexprrrrÚrequires_partialGs r&) Ú__doc__Z __future__rrÚreZsympy.core.compatibilityrÚcompilerrr&rrrrÚs   9