Cargo Features

[dependencies]
cpython-json = { version = "0.3.0", default-features = false, features = ["python27-sys", "python3-sys"] }
default = python3-sys

The python3-sys feature is set by default whenever cpython-json is added without default-features = false somewhere in the dependency tree.

python27-sys

Enables python27-sys of cpython ^0.2

python3-sys default

Enables python3-sys of cpython ^0.2

cpython-json has 3 features without comments.