Strings

Columns containing strings are represented as the object type in Pandas.

Since a lot of data you will encounter involve strings, it is important that you know how to manipulate them. Python allows you to use its built-in string manipulation methods with the str accessor. There are several string methods, some of which are .upper() and .lower(). They convert strings to upper and lower case, respectively.

# Converts 'col_a' to lower case
df['col_a'].str.lower()

# Converts 'col_b' to upper case
df['col_b'].str.upper()

Inspect the 'sex' and 'smoker' columns in the shell.
Convert the 'sex' column into lower case.
Convert the 'smoker' column into upper case.
Inspect the 'sex' and 'smoker' columns to ensure that case conversion worked.

Exercise

Strings

Instructions