anchor.diff:  
     guzzle_sphinx_theme = callPackage ../development/python-modules/guzzle_sphinx_theme { };
   
  -  gvm-tools = callPackage ../development/python-modules/gvm-tools {};
  -
  -  gviz-api = callPackage ../development/python-modules/gviz-api {};
  +  gvm-tools = callPackage ../development/python-modules/gvm-tools { };
  +
  +  gviz-api = callPackage ../development/python-modules/gviz-api { };
   
     gym = callPackage ../development/python-modules/gym { };
   
  
positive.code:   # See build-setupcfg/default.nix for documentation.
    buildSetupcfg = import ../build-support/build-setupcfg self;
  
    fetchPypi = callPackage ../development/interpreters/python/fetchpypi.nix {};
  
    # Check whether a derivation provides a Python module.
    hasPythonModule = drv: drv?pythonModule && drv.pythonModule == python;
  
negative.code: 
    click-threading = callPackage ../development/python-modules/click-threading { };
  
    clickhouse-cityhash = callPackage ../development/python-modules/clickhouse-cityhash { };
  
    clickhouse-cli = callPackage ../development/python-modules/clickhouse-cli { };
  
    clickhouse-driver = callPackage ../development/python-modules/clickhouse-driver { };
  
    cliff = callPackage ../development/python-modules/cliff { };
  
  