52583/python-error-series-object-is-not-callable
This line:
df['ln_returns'] = np.log(df['Close_mid']/df['Close_mid'](1))
Gives the following error:
'Series' object is not callable
Try this:
df['ln_returns'] = np.log(df['Close_mid']/df['Close_mid'])
df['Close_mid'](1)) doesn't seem to be doing anything
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