pandas.Series.str.lower — pandas 1.3.5 documentation
pandas.pydata.org › pandasConverts uppercase to lowercase and lowercase to uppercase. Series.str.casefold. Removes all case distinctions in the string. Examples. >>> s = pd.Series( ['lower', 'CAPITALS', 'this is a sentence', 'SwApCaSe']) >>> s 0 lower 1 CAPITALS 2 this is a sentence 3 SwApCaSe dtype: object. >>> s.str.lower() 0 lower 1 capitals 2 this is a sentence 3 ...
pandas.Series.shift — pandas 1.3.5 documentation
pandas.pydata.org › api › pandaspandas.Series.shift ¶. pandas.Series.shift. ¶. Series.shift(periods=1, freq=None, axis=0, fill_value=None) [source] ¶. Shift index by desired number of periods with an optional time freq. When freq is not passed, shift the index without realigning the data. If freq is passed (in this case, the index must be date or datetime, or it will raise ...
Introduction to Computation and Programming Using Python, ...
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