Python выдаёт ошибку: SyntaxError: invalid syntax что делать?

def myCode(filepath):
    with open(filepath, 'r') as f:
        data = f.read()
        return data

def default_settings():=

settings = default_settings()
credentials = settings['credentials']
password, host, port = parse_credentials(credentials)

filename = 'tcp\\test.py'
code = myCode(filename)
Encoding = 'UTF-8'
origin = os.path.basename(__file__)

send_code(filename, code, encoding, password, host, port, origin)

def default_settings():=
                          ^
SyntaxError: invalid syntax