Use arithmetic operator instead of a function

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Metadata

ID: python-pandas/arith-operator-not-functions

Language: Python

Severity: Notice

Category: Best Practices

Description

User should use arithmetic operators (+, -, etc) instead of function (.add) to make the code more clear.

Non-Compliant Code Examples

def myfunction():
    foo = pd.DataFrame({'angles': [0, 3, 4],
                        'degrees': [360, 180, 360]},
                        index=['circle', 'triangle', 'rectangle'])
    if something:
        baz = foo.add(1)
    elif other_thing:
        baz = foo.add(42)
    else:
        baz = foo.add(51)

    bar = whatever()
    baz = bar.add(4)

def myfunction():
    foo = pd.DataFrame({'angles': [0, 3, 4],
                        'degrees': [360, 180, 360]},
                        index=['circle', 'triangle', 'rectangle'])
    baz = foo.add(1)

    bar = whatever()
    baz = bar.add(4)

Compliant Code Examples

foo = pd.DataFrame({'angles': [0, 3, 4],
                   'degrees': [360, 180, 360]},
                  index=['circle', 'triangle', 'rectangle'])
baz = foo + 1