//work1
def is_valid_email(addr):
    r_addr = re.match(r'([0-1a-zA-Z.]*)@([a-z.]*)', addr)
    if r_addr is None:
        print('false')
        return False
    else:
        print(r_addr.groups())
        return True

//work2
def name_of_email(addr):
    rm = re.match('<(\w+\s+\w+)>', addr)
    
    if rm is None:  
        return re.match('(\w+)@(\w+)', addr).group(1)
    else:
        return rm.group(1)