Common string methods

[jekwatt]

lower, upper, title, and len

e.g.
df["col_1"].str.lower()
df["col_1"].str.upper()
df["col_1"] = df["col_1"].str.title()
df["col_1"].str.len()

To make the change, assign the field to the value: df["col_1"] = df["col_1"].str.lower()

[jekwatt]

Working with text data: https://pandas.pydata.org/pandas-docs/stable/user_guide/text.html