libcheck.py

from pip._vendor import pkg_resources

dep_list = set()

def get_dependencies(package_name):
    package_name = package_name.split('<')[0]
    package_name = package_name.split('>')[0]
    global dep_list
    pkg_dependencies = [str(dep) for dep in pkg_resources.working_set.by_key[package_name].requires()]
    print(pkg_dependencies)
    if not pkg_dependencies:
        dep_list.add(package_name)
    else:
        for i in pkg_dependencies:
            get_dependencies(i)

package = 'pyaudio'
get_dependencies(package)

# print([str(r) for r in list.requires()])
print(dep_list)

# ['charset-normalizer<4,>=2', 'idna<4,>=2.5', 'urllib3<3,>=1.21.1', 'certifi>=2017.4.17']
print(get_dependencies('charset-normalizer'))