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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 _decreaseIndent(self, indent):
 """Remove 1 indentation level """

        if indent.endswith(self._qpartIndent()):
            return indent[:-len(self._qpartIndent())]
        else:  # oops, strange indentation, just return previous indent
            return indent