environment.py 文件源码

def install_libraries(libraries):
    """
    Install libraries that are not already installed.
    Arguments:
        libraries (iterable):
    Returns:
        None
    """

    # Get currently installed libraries
    libraries_installed = [lib.key for lib in get_installed_distributions()]

    # Install libraries not found in the currently installed libraries
    for lib in libraries:
        if lib not in libraries_installed:
            print('Installing {} ...'.format(lib))
            main(['install', lib])
        else:
            print('{} is already installed.'.format(lib))