map(lambda x: [ret_ttest.loc[x][0], ret_ttest.loc[x][1]], ret_ttest.index)结果：
list(map(lambda x: [ret_ttest.loc[x][0], ret_ttest.loc[x][1]], ret_ttest.index))报错：---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
----> 1 ret_ttest_df = list(map(lambda x: ret_ttest.loc[x, ret_ttest.locx], ret_ttest.index))
TypeError: 'list' object is not callable
前几天升级了3.6,现在map对象不是在外面添加list()来转换吗
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Use a for loop to iterate.
Like this
This map is lazy evaluation and returns something similar to an iterator. Looking at the error message, it should be a problem with your lambda expression. The previous one did not report an error because it was not executed. So check whether the lambda expression you passed in is Not a problem.