A line is less indented than it should be for hanging indents.

Anti-pattern

In the first example, the keys of this dict are only indented with 3 spaces. They should be indented with 4 spaces.

result = {
   'key1': 'value',
   'key2': 'value',
}

Best practice

result = {
    'key1': 'value',
    'key2': 'value',
}

Anti-pattern

In this example, the second line is only indented with 2 spaces. It should be indented with 4 spaces.

print("Python", (
  "Rules"))

Best practice

print("Python", (
    "Rules"))