python IndentationError: expected an indented block

该错误提示是Python的缩进错误，意味着在代码中期望一个缩进块，但是没有得到。这通常是由于缩进不正确导致的。在Python中，缩进是非常重要的，它用来表示代码块的开始和结束。当你在一个语句后面使用冒号(:)时，你需要在下一行开始一个缩进块来表示这个语句的内容。通常情况下，一个缩进块是由4个空格或者一个制表符组成的。所以，当你看到"IndentationError: expected an indented block"这个错误提示时，你需要检查你的代码并确保缩进是正确的。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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