我正在安装 Cassandra 在我的mac上通过 anaconda 但我对环境有个问题： failed with initial frozen solve . 用灵活的解决方法重试。此外，发现以下规范相互不兼容：

Package ca-certificates conflicts for:
    cassandra-driver -> python=3.6 -> openssl[version='>=1.0.2p,<1.0.3a'] -> ca-certificates
    python=3.7 -> openssl[version='>=1.1.1a,<1.1.2a'] -> ca-certificates
    Package setuptools conflicts for:
    cassandra-driver -> python=3.6 -> pip -> setuptools
    python=3.7 -> pip -> setuptools
    Package pip conflicts for:
    python=3.7 -> pip
    cassandra-driver -> python=3.6 -> pip
    Package certifi conflicts for:
    python=3.7 -> pip -> setuptools -> certifi[version='>=2016.09']
    cassandra-driver -> python=3.6 -> pip -> setuptools -> certifi[version='>=2016.09']
    Package wheel conflicts for:
    cassandra-driver -> python=3.6 -> pip -> wheel
    python=3.7 -> pip -> wheel