[Python] pandas: difference between df.pop('x') and df.drop('x', axis=1,inplace=True) and del...

Do they have the same exact effect (other than the fact that only one returns the popped column)? If so, is there ever a reason to use df.drop('x', axis=1,inplace=True) or del df['x']over the more concise df.pop('x')?

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