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How to use _dispatch method in pyatom

Best Python code snippet using pyatom_python

pymol.js

Source:pymol.js

...1062          this._outer._send(mypath);1063        }1064      }1065      //      viewing: function() {1066      //        this._dispatch("viewing");1067      //      }1068    }1069    // enable inner pseudo-inner-instance to find the outer instance1070    this.cmd._outer                = this1071    this.getattr._outer            = this1072}1073// utility functions not used above, but of use to some users, one hopes1074function parse_file(f) {1075  var re = /[\\\/]/;1076  fields = f.split(re);1077  filename = fields[fields.length-1];1078  dot = filename.lastIndexOf('.');1079  if (dot > -1) {1080    name = filename.slice(0,dot);...

compiler_unparse.py

Source:compiler_unparse.py

...35        self.f = file36        self._single_func = single_line_functions37        self._do_indent = True38        self._indent = 039        self._dispatch(tree)40        self._write("\n")41        self.f.flush()42    #########################################################################43    # Unparser private interface.44    #########################################################################45    ### format, output, and dispatch methods ################################46    def _fill(self, text = ""):47        "Indent a piece of text, according to the current indentation level"48        if self._do_indent:49            self._write("\n"+"    "*self._indent + text)50        else:51            self._write(text)52    def _write(self, text):53        "Append a piece of text to the current line."54        self.f.write(text)55    def _enter(self):56        "Print ':', and increase the indentation."57        self._write(": ")58        self._indent += 159    def _leave(self):60        "Decrease the indentation level."61        self._indent -= 162    def _dispatch(self, tree):63        "_dispatcher function, _dispatching tree type T to method _T."64        if isinstance(tree, list):65            for t in tree:66                self._dispatch(t)67            return68        meth = getattr(self, "_"+tree.__class__.__name__)69        if tree.__class__.__name__ == 'NoneType' and not self._do_indent:70            return71        meth(tree)72    #########################################################################73    # compiler.ast unparsing methods.74    #75    # There should be one method per concrete grammar type. They are76    # organized in alphabetical order.77    #########################################################################78    def _Add(self, t):79        self.__binary_op(t, '+')80    def _And(self, t):81        self._write(" (")82        for i, node in enumerate(t.nodes):83            self._dispatch(node)84            if i != len(t.nodes)-1:85                self._write(") and (")86        self._write(")")87    def _AssAttr(self, t):88        """ Handle assigning an attribute of an object89        """90        self._dispatch(t.expr)91        self._write('.'+t.attrname)92    def _Assign(self, t):93        """ Expression Assignment such as "a = 1".94            This only handles assignment in expressions.  Keyword assignment95            is handled separately.96        """97        self._fill()98        for target in t.nodes:99            self._dispatch(target)100            self._write(" = ")101        self._dispatch(t.expr)102        if not self._do_indent:103            self._write('; ')104    def _AssName(self, t):105        """ Name on left hand side of expression.106            Treat just like a name on the right side of an expression.107        """108        self._Name(t)109    def _AssTuple(self, t):110        """ Tuple on left hand side of an expression.111        """112        # _write each elements, separated by a comma.113        for element in t.nodes[:-1]:114            self._dispatch(element)115            self._write(", ")116        # Handle the last one without writing comma117        last_element = t.nodes[-1]118        self._dispatch(last_element)119    def _AugAssign(self, t):120        """ +=,-=,*=,/=,**=, etc. operations121        """122        self._fill()123        self._dispatch(t.node)124        self._write(' '+t.op+' ')125        self._dispatch(t.expr)126        if not self._do_indent:127            self._write(';')128    def _Bitand(self, t):129        """ Bit and operation.130        """131        for i, node in enumerate(t.nodes):132            self._write("(")133            self._dispatch(node)134            self._write(")")135            if i != len(t.nodes)-1:136                self._write(" & ")137    def _Bitor(self, t):138        """ Bit or operation139        """140        for i, node in enumerate(t.nodes):141            self._write("(")142            self._dispatch(node)143            self._write(")")144            if i != len(t.nodes)-1:145                self._write(" | ")146    def _CallFunc(self, t):147        """ Function call.148        """149        self._dispatch(t.node)150        self._write("(")151        comma = False152        for e in t.args:153            if comma: self._write(", ")154            else: comma = True155            self._dispatch(e)156        if t.star_args:157            if comma: self._write(", ")158            else: comma = True159            self._write("*")160            self._dispatch(t.star_args)161        if t.dstar_args:162            if comma: self._write(", ")163            else: comma = True164            self._write("**")165            self._dispatch(t.dstar_args)166        self._write(")")167    def _Compare(self, t):168        self._dispatch(t.expr)169        for op, expr in t.ops:170            self._write(" " + op + " ")171            self._dispatch(expr)172    def _Const(self, t):173        """ A constant value such as an integer value, 3, or a string, "hello".174        """175        self._dispatch(t.value)176    def _Decorators(self, t):177        """ Handle function decorators (eg. @has_units)178        """179        for node in t.nodes:180            self._dispatch(node)181    def _Dict(self, t):182        self._write("{")183        for  i, (k, v) in enumerate(t.items):184            self._dispatch(k)185            self._write(": ")186            self._dispatch(v)187            if i < len(t.items)-1:188                self._write(", ")189        self._write("}")190    def _Discard(self, t):191        """ Node for when return value is ignored such as in "foo(a)".192        """193        self._fill()194        self._dispatch(t.expr)195    def _Div(self, t):196        self.__binary_op(t, '/')197    def _Ellipsis(self, t):198        self._write("...")199    def _From(self, t):200        """ Handle "from xyz import foo, bar as baz".201        """202        # fixme: Are From and ImportFrom handled differently?203        self._fill("from ")204        self._write(t.modname)205        self._write(" import ")206        for i, (name,asname) in enumerate(t.names):207            if i != 0:208                self._write(", ")209            self._write(name)210            if asname is not None:211                self._write(" as "+asname)212    def _Function(self, t):213        """ Handle function definitions214        """215        if t.decorators is not None:216            self._fill("@")217            self._dispatch(t.decorators)218        self._fill("def "+t.name + "(")219        defaults = [None] * (len(t.argnames) - len(t.defaults)) + list(t.defaults)220        for i, arg in enumerate(zip(t.argnames, defaults)):221            self._write(arg[0])222            if arg[1] is not None:223                self._write('=')224                self._dispatch(arg[1])225            if i < len(t.argnames)-1:226                self._write(', ')227        self._write(")")228        if self._single_func:229            self._do_indent = False230        self._enter()231        self._dispatch(t.code)232        self._leave()233        self._do_indent = True234    def _Getattr(self, t):235        """ Handle getting an attribute of an object236        """237        if isinstance(t.expr, (Div, Mul, Sub, Add)):238            self._write('(')239            self._dispatch(t.expr)240            self._write(')')241        else:242            self._dispatch(t.expr)243            244        self._write('.'+t.attrname)245        246    def _If(self, t):247        self._fill()248        249        for i, (compare,code) in enumerate(t.tests):250            if i == 0:251                self._write("if ")252            else:253                self._write("elif ")254            self._dispatch(compare)255            self._enter()256            self._fill()257            self._dispatch(code)258            self._leave()259            self._write("\n")260        if t.else_ is not None:261            self._write("else")262            self._enter()263            self._fill()264            self._dispatch(t.else_)265            self._leave()266            self._write("\n")267            268    def _IfExp(self, t):269        self._dispatch(t.then)270        self._write(" if ")271        self._dispatch(t.test)272        if t.else_ is not None:273            self._write(" else (")274            self._dispatch(t.else_)275            self._write(")")276    def _Import(self, t):277        """ Handle "import xyz.foo".278        """279        self._fill("import ")280        281        for i, (name,asname) in enumerate(t.names):282            if i != 0:283                self._write(", ")284            self._write(name)285            if asname is not None:286                self._write(" as "+asname)287    def _Keyword(self, t):288        """ Keyword value assignment within function calls and definitions.289        """290        self._write(t.name)291        self._write("=")292        self._dispatch(t.expr)293        294    def _List(self, t):295        self._write("[")296        for  i,node in enumerate(t.nodes):297            self._dispatch(node)298            if i < len(t.nodes)-1:299                self._write(", ")300        self._write("]")301    def _Module(self, t):302        if t.doc is not None:303            self._dispatch(t.doc)304        self._dispatch(t.node)305    def _Mul(self, t):306        self.__binary_op(t, '*')307    def _Name(self, t):308        self._write(t.name)309    def _NoneType(self, t):310        self._write("None")311        312    def _Not(self, t):313        self._write('not (')314        self._dispatch(t.expr)315        self._write(')')316        317    def _Or(self, t):318        self._write(" (")319        for i, node in enumerate(t.nodes):320            self._dispatch(node)321            if i != len(t.nodes)-1:322                self._write(") or (")323        self._write(")")324                325    def _Pass(self, t):326        self._write("pass\n")327    def _Printnl(self, t):328        self._fill("print ")329        if t.dest:330            self._write(">> ")331            self._dispatch(t.dest)332            self._write(", ")333        comma = False334        for node in t.nodes:335            if comma: self._write(', ')336            else: comma = True337            self._dispatch(node)338    def _Power(self, t):339        self.__binary_op(t, '**')340    def _Return(self, t):341        self._fill("return ")342        if t.value:343            if isinstance(t.value, Tuple):344                text = ', '.join([ name.name for name in t.value.asList() ])345                self._write(text)346            else:347                self._dispatch(t.value)348            if not self._do_indent:349                self._write('; ')350    def _Slice(self, t):351        self._dispatch(t.expr)352        self._write("[")353        if t.lower:354            self._dispatch(t.lower)355        self._write(":")356        if t.upper:357            self._dispatch(t.upper)358        #if t.step:359        #    self._write(":")360        #    self._dispatch(t.step)361        self._write("]")362    def _Sliceobj(self, t):363        for i, node in enumerate(t.nodes):364            if i != 0:365                self._write(":")366            if not (isinstance(node, Const) and node.value is None):367                self._dispatch(node)368    def _Stmt(self, tree):369        for node in tree.nodes:370            self._dispatch(node)371    def _Sub(self, t):372        self.__binary_op(t, '-')373    def _Subscript(self, t):374        self._dispatch(t.expr)375        self._write("[")376        for i, value in enumerate(t.subs):377            if i != 0:378                self._write(",")379            self._dispatch(value)380        self._write("]")381    def _TryExcept(self, t):382        self._fill("try")383        self._enter()384        self._dispatch(t.body)385        self._leave()386        for handler in t.handlers:387            self._fill('except ')388            self._dispatch(handler[0])389            if handler[1] is not None:390                self._write(', ')391                self._dispatch(handler[1])392            self._enter()393            self._dispatch(handler[2])394            self._leave()395            396        if t.else_:397            self._fill("else")398            self._enter()399            self._dispatch(t.else_)400            self._leave()401    def _Tuple(self, t):402        if not t.nodes:403            # Empty tuple.404            self._write("()")405        else:406            self._write("(")407            # _write each elements, separated by a comma.408            for element in t.nodes[:-1]:409                self._dispatch(element)410                self._write(", ")411            # Handle the last one without writing comma412            last_element = t.nodes[-1]413            self._dispatch(last_element)414            self._write(")")415            416    def _UnaryAdd(self, t):417        self._write("+")418        self._dispatch(t.expr)419        420    def _UnarySub(self, t):421        self._write("-")422        self._dispatch(t.expr)        423    def _With(self, t):424        self._fill('with ')425        self._dispatch(t.expr)426        if t.vars:427            self._write(' as ')428            self._dispatch(t.vars.name)429        self._enter()430        self._dispatch(t.body)431        self._leave()432        self._write('\n')433        434    def _int(self, t):435        self._write(repr(t))436    def __binary_op(self, t, symbol):437        # Check if parenthesis are needed on left side and then dispatch438        has_paren = False439        left_class = str(t.left.__class__)440        if (left_class in op_precedence.keys() and441            op_precedence[left_class] < op_precedence[str(t.__class__)]):442            has_paren = True443        if has_paren:444            self._write('(')445        self._dispatch(t.left)446        if has_paren:447            self._write(')')448        # Write the appropriate symbol for operator449        self._write(symbol)450        # Check if parenthesis are needed on the right side and then dispatch451        has_paren = False452        right_class = str(t.right.__class__)453        if (right_class in op_precedence.keys() and454            op_precedence[right_class] < op_precedence[str(t.__class__)]):455            has_paren = True456        if has_paren:457            self._write('(')458        self._dispatch(t.right)459        if has_paren:460            self._write(')')461    def _float(self, t):462        # if t is 0.1, str(t)->'0.1' while repr(t)->'0.1000000000001'463        # We prefer str here.464        self._write(str(t))465    def _str(self, t):466        self._write(repr(t))467        468    def _tuple(self, t):469        self._write(str(t))470    #########################################################################471    # These are the methods from the _ast modules unparse.472    #473    # As our needs to handle more advanced code increase, we may want to474    # modify some of the methods below so that they work for compiler.ast.475    #########################################################################476#    # stmt477#    def _Expr(self, tree):478#        self._fill()479#        self._dispatch(tree.value)480#481#    def _Import(self, t):482#        self._fill("import ")483#        first = True484#        for a in t.names:485#            if first:486#                first = False487#            else:488#                self._write(", ")489#            self._write(a.name)490#            if a.asname:491#                self._write(" as "+a.asname)492#493##    def _ImportFrom(self, t):494##        self._fill("from ")495##        self._write(t.module)496##        self._write(" import ")497##        for i, a in enumerate(t.names):498##            if i == 0:499##                self._write(", ")500##            self._write(a.name)501##            if a.asname:502##                self._write(" as "+a.asname)503##        # XXX(jpe) what is level for?504##505#506#    def _Break(self, t):507#        self._fill("break")508#509#    def _Continue(self, t):510#        self._fill("continue")511#512#    def _Delete(self, t):513#        self._fill("del ")514#        self._dispatch(t.targets)515#516#    def _Assert(self, t):517#        self._fill("assert ")518#        self._dispatch(t.test)519#        if t.msg:520#            self._write(", ")521#            self._dispatch(t.msg)522#523#    def _Exec(self, t):524#        self._fill("exec ")525#        self._dispatch(t.body)526#        if t.globals:527#            self._write(" in ")528#            self._dispatch(t.globals)529#        if t.locals:530#            self._write(", ")531#            self._dispatch(t.locals)532#533#    def _Print(self, t):534#        self._fill("print ")535#        do_comma = False536#        if t.dest:537#            self._write(">>")538#            self._dispatch(t.dest)539#            do_comma = True540#        for e in t.values:541#            if do_comma:self._write(", ")542#            else:do_comma=True543#            self._dispatch(e)544#        if not t.nl:545#            self._write(",")546#547#    def _Global(self, t):548#        self._fill("global")549#        for i, n in enumerate(t.names):550#            if i != 0:551#                self._write(",")552#            self._write(" " + n)553#554#    def _Yield(self, t):555#        self._fill("yield")556#        if t.value:557#            self._write(" (")558#            self._dispatch(t.value)559#            self._write(")")560#561#    def _Raise(self, t):562#        self._fill('raise ')563#        if t.type:564#            self._dispatch(t.type)565#        if t.inst:566#            self._write(", ")567#            self._dispatch(t.inst)568#        if t.tback:569#            self._write(", ")570#            self._dispatch(t.tback)571#572#573#    def _TryFinally(self, t):574#        self._fill("try")575#        self._enter()576#        self._dispatch(t.body)577#        self._leave()578#579#        self._fill("finally")580#        self._enter()581#        self._dispatch(t.finalbody)582#        self._leave()583#584#    def _excepthandler(self, t):585#        self._fill("except ")586#        if t.type:587#            self._dispatch(t.type)588#        if t.name:589#            self._write(", ")590#            self._dispatch(t.name)591#        self._enter()592#        self._dispatch(t.body)593#        self._leave()594#595#    def _ClassDef(self, t):596#        self._write("\n")597#        self._fill("class "+t.name)598#        if t.bases:599#            self._write("(")600#            for a in t.bases:601#                self._dispatch(a)602#                self._write(", ")603#            self._write(")")604#        self._enter()605#        self._dispatch(t.body)606#        self._leave()607#608#    def _FunctionDef(self, t):609#        self._write("\n")610#        for deco in t.decorators:611#            self._fill("@")612#            self._dispatch(deco)613#        self._fill("def "+t.name + "(")614#        self._dispatch(t.args)615#        self._write(")")616#        self._enter()617#        self._dispatch(t.body)618#        self._leave()619#620#    def _For(self, t):621#        self._fill("for ")622#        self._dispatch(t.target)623#        self._write(" in ")624#        self._dispatch(t.iter)625#        self._enter()626#        self._dispatch(t.body)627#        self._leave()628#        if t.orelse:629#            self._fill("else")630#            self._enter()631#            self._dispatch(t.orelse)632#            self._leave633#634#    def _While(self, t):635#        self._fill("while ")636#        self._dispatch(t.test)637#        self._enter()638#        self._dispatch(t.body)639#        self._leave()640#        if t.orelse:641#            self._fill("else")642#            self._enter()643#            self._dispatch(t.orelse)644#            self._leave645#646#    # expr647#    def _Str(self, tree):648#        self._write(repr(tree.s))649##650#    def _Repr(self, t):651#        self._write("`")652#        self._dispatch(t.value)653#        self._write("`")654#655#    def _Num(self, t):656#        self._write(repr(t.n))657#658#    def _ListComp(self, t):659#        self._write("[")660#        self._dispatch(t.elt)661#        for gen in t.generators:662#            self._dispatch(gen)663#        self._write("]")664#665#    def _GeneratorExp(self, t):666#        self._write("(")667#        self._dispatch(t.elt)668#        for gen in t.generators:669#            self._dispatch(gen)670#        self._write(")")671#672#    def _comprehension(self, t):673#        self._write(" for ")674#        self._dispatch(t.target)675#        self._write(" in ")676#        self._dispatch(t.iter)677#        for if_clause in t.ifs:678#            self._write(" if ")679#            self._dispatch(if_clause)680#681#    def _IfExp(self, t):682#        self._dispatch(t.body)683#        self._write(" if ")684#        self._dispatch(t.test)685#        if t.orelse:686#            self._write(" else ")687#            self._dispatch(t.orelse)688#689#    unop = {"Invert":"~", "Not": "not", "UAdd":"+", "USub":"-"}690#    def _UnaryOp(self, t):691#        self._write(self.unop[t.op.__class__.__name__])692#        self._write("(")693#        self._dispatch(t.operand)694#        self._write(")")695#696#    binop = { "Add":"+", "Sub":"-", "Mult":"*", "Div":"/", "Mod":"%",697#                    "LShift":">>", "RShift":"<<", "BitOr":"|", "BitXor":"^", "BitAnd":"&",698#                    "FloorDiv":"//", "Pow": "**"}699#    def _BinOp(self, t):700#        self._write("(")701#        self._dispatch(t.left)702#        self._write(")" + self.binop[t.op.__class__.__name__] + "(")703#        self._dispatch(t.right)704#        self._write(")")705#706#    boolops = {_ast.And: 'and', _ast.Or: 'or'}707#    def _BoolOp(self, t):708#        self._write("(")709#        self._dispatch(t.values[0])710#        for v in t.values[1:]:711#            self._write(" %s " % self.boolops[t.op.__class__])712#            self._dispatch(v)713#        self._write(")")714#715#    def _Attribute(self,t):716#        self._dispatch(t.value)717#        self._write(".")718#        self._write(t.attr)719#720##    def _Call(self, t):721##        self._dispatch(t.func)722##        self._write("(")723##        comma = False724##        for e in t.args:725##            if comma: self._write(", ")726##            else: comma = True727##            self._dispatch(e)728##        for e in t.keywords:729##            if comma: self._write(", ")730##            else: comma = True731##            self._dispatch(e)732##        if t.starargs:733##            if comma: self._write(", ")734##            else: comma = True735##            self._write("*")736##            self._dispatch(t.starargs)737##        if t.kwargs:738##            if comma: self._write(", ")739##            else: comma = True740##            self._write("**")741##            self._dispatch(t.kwargs)742##        self._write(")")743#744#    # slice745#    def _Index(self, t):746#        self._dispatch(t.value)747#748#    def _ExtSlice(self, t):749#        for i, d in enumerate(t.dims):750#            if i != 0:751#                self._write(': ')752#            self._dispatch(d)753#754#    # others755#    def _arguments(self, t):756#        first = True757#        nonDef = len(t.args)-len(t.defaults)758#        for a in t.args[0:nonDef]:759#            if first:first = False760#            else: self._write(", ")761#            self._dispatch(a)762#        for a,d in zip(t.args[nonDef:], t.defaults):763#            if first:first = False764#            else: self._write(", ")765#            self._dispatch(a),766#            self._write("=")767#            self._dispatch(d)768#        if t.vararg:769#            if first:first = False770#            else: self._write(", ")771#            self._write("*"+t.vararg)772#        if t.kwarg:773#            if first:first = False774#            else: self._write(", ")775#            self._write("**"+t.kwarg)776#777##    def _keyword(self, t):778##        self._write(t.arg)779##        self._write("=")780##        self._dispatch(t.value)781#782#    def _Lambda(self, t):783#        self._write("lambda ")784#        self._dispatch(t.args)785#        self._write(": ")...

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