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I noticed a bug in my program and the reason it is happening is because it seems that pandas is copying by reference a pandas dataframe instead of by value. I know immutable objects will always be passed by reference but pandas dataframe is not immutable so I do not see why it is passing by reference. Can anyone provide some information?
Thanks! Andrew
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Pandas DataFrame copy() Method The copy() method returns a copy of the DataFrame. By default, the copy is a "deep copy" meaning that any changes made in the original DataFrame will NOT be reflected in the copy.
If you want to make an explicit copy of a pandas object, try new_frame = frame. copy() .
To copy Pandas DataFrame, use the copy() method. The DataFrame. copy() method makes a copy of the provided object's indices and data. The copy() method accepts one parameter called deep, and it returns the Series or DataFrame that matches the caller.
All functions in Python are "pass by reference", there is no "pass by value". If you want to make an explicit copy of a pandas object, try new_frame = frame.copy().
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