How to break a long line with multiple bracket pairs?

Question

How to break a long line with multiple bracket pairs to follow PEP 8’s 79-character limit?

config["network"]["connection"]["client_properties"]["service"] = config["network"]["connection"]["client_properties"]["service"].format(service=service)

Answer 1

Using black, the opinionated, reproducible code formatter:

config["network"]["connection"]["client_properties"][
    "service"
] = config["network"]["connection"]["client_properties"][
    "service"
].format(
    service=service
)