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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def autoIndentBlock(self, block, char='\n'):
 """Indent block after Enter pressed or trigger character typed """

        currentText = block.text()
        spaceAtStartLen = len(currentText) - len(currentText.lstrip())
        currentIndent = currentText[:spaceAtStartLen]
        indent = self._smartIndenter.computeIndent(block, char)
        if indent is not None and indent != currentIndent:
            self._qpart.replaceText(block.position(), spaceAtStartLen, indent)