Similarly to #1101 it is possible with a well compacted symbol list cache that mapping on to Python strings is the most expensive part of list_symbols in some cases.
之前提到len函数式会调用对象的__len__, 如果是使用遍历的方式求长度那么效率会很低, 但是在求python内置类型的长度比如len(list ...
IndexError: ‘list index out of range’ is a Python error that occurs when attempting to access a list item outside the range of the list. In Python, list indexes ...
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