def attributeNameState()

in bleach/_vendor/html5lib/_tokenizer.py [0:0]
45 lines of code
11 McCabe index (conditional complexity)

    def attributeNameState(self):
        data = self.stream.char()
        leavingThisState = True
        emitToken = False
        if data == "=":
            self.state = self.beforeAttributeValueState
        elif data in asciiLetters:
            self.currentToken["data"][-1][0] += data +\
                self.stream.charsUntil(asciiLetters, True)
            leavingThisState = False
        elif data == ">":
            # XXX If we emit here the attributes are converted to a dict
            # without being checked and when the code below runs we error
            # because data is a dict not a list
            emitToken = True
        elif data in spaceCharacters:
            self.state = self.afterAttributeNameState
        elif data == "/":
            self.state = self.selfClosingStartTagState
        elif data == "\u0000":
            self.tokenQueue.append({"type": tokenTypes["ParseError"],
                                    "data": "invalid-codepoint"})
            self.currentToken["data"][-1][0] += "\uFFFD"
            leavingThisState = False
        elif data in ("'", '"', "<"):
            self.tokenQueue.append({"type": tokenTypes["ParseError"],
                                    "data":
                                    "invalid-character-in-attribute-name"})
            self.currentToken["data"][-1][0] += data
            leavingThisState = False
        elif data is EOF:
            self.tokenQueue.append({"type": tokenTypes["ParseError"],
                                    "data": "eof-in-attribute-name"})
            self.state = self.dataState
        else:
            self.currentToken["data"][-1][0] += data
            leavingThisState = False

        if leavingThisState:
            # Attributes are not dropped at this stage. That happens when the
            # start tag token is emitted so values can still be safely appended
            # to attributes, but we do want to report the parse error in time.
            self.currentToken["data"][-1][0] = (
                self.currentToken["data"][-1][0].translate(asciiUpper2Lower))
            for name, _ in self.currentToken["data"][:-1]:
                if self.currentToken["data"][-1][0] == name:
                    self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
                                            "duplicate-attribute"})
                    break
            # XXX Fix for above XXX
            if emitToken:
                self.emitCurrentToken()
        return True