How to use the pipreqs.pipreqs function in pipreqs

def test_deduplicate_dependencies(self):
        imports = pipreqs.get_all_imports(self.project_with_duplicated_deps)
        pkgs = pipreqs.get_pkg_names(imports)
        self.assertEqual(len(pkgs), 1)
        self.assertTrue("pymongo" in pkgs)

def test_get_all_imports(self):
        imports = pipreqs.get_all_imports(self.project)
        self.assertEqual(len(imports), 13)
        for item in imports:
            self.assertTrue(
                item.lower() in self.modules, "Import is missing: " + item)
        self.assertFalse("time" in imports)
        self.assertFalse("logging" in imports)
        self.assertFalse("curses" in imports)
        self.assertFalse("__future__" in imports)
        self.assertFalse("django" in imports)
        self.assertFalse("models" in imports)

def import_from_code(path="."):
    from pipreqs import pipreqs

    rs = []
    try:
        for r in pipreqs.get_all_imports(
            path, encoding="utf-8", extra_ignore_dirs=[".venv"]
        ):
            if r not in BAD_PACKAGES:
                rs.append(r)
        pkg_names = pipreqs.get_pkg_names(rs)
        return [proper_case(r) for r in pkg_names]

    except Exception:
        return []

def import_from_code(path='.'):
    from pipreqs import pipreqs
    rs = []
    try:
        for r in pipreqs.get_all_imports(path):
            if r not in BAD_PACKAGES:
                rs.append(r)
        pkg_names = pipreqs.get_pkg_names(rs)
        return [proper_case(r) for r in pkg_names]
    except Exception:
        return []

def import_from_code(path='.'):
    from pipreqs import pipreqs
    rs = []
    try:
        for r in pipreqs.get_all_imports(path):
            if r not in BAD_PACKAGES:
                rs.append(r)
        pkg_names = pipreqs.get_pkg_names(rs)
        return [proper_case(r) for r in pkg_names]
    except Exception:
        return []

def import_from_code(path="."):
    from pipreqs import pipreqs

    rs = []
    try:
        for r in pipreqs.get_all_imports(
            path, encoding="utf-8", extra_ignore_dirs=[".venv"]
        ):
            if r not in BAD_PACKAGES:
                rs.append(r)
        pkg_names = pipreqs.get_pkg_names(rs)
        return [proper_case(r) for r in pkg_names]

    except Exception:
        return []