", line 1, in TypeError: 'NoneType' object does not support item assignment Also bonus question: How do I import the config.py file? This will work like a charm as you are not trying to change the string itself. What does the Ellipsis object do? 146 Having trouble printing combinations generator. 1 .报错原因如下：尝试使用range() 创建整数列表（导致“TypeError: ‘range’ object does not support item assignment”）有时你想要得到一个有序的整数列表，所以range() 看上去是生成此列表的不错方式。 Object attributes have their own place in Python’s assignment strategy. ... TypeError: 'tuple' object does not support item assignment when swapping values. Questions: I have the following data frame in IPython, where each row is a single stock: In [261]: bdata Out[261]: Int64Index: 21210 entries, 0 to 21209 Data columns: BloombergTicker 21206 non-null values Company 21210 non-null values Country 21210 non-null values MarketCap 21210 non-null values PriceReturn 21210 non-null values SEDOL 21210 non-null … 594. 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