cmcc_program4.py 文件源码

def  base64code(s,d):
    global b64str
    global f
    if(d==len(b64str)):
        f.write(binascii.b2a_qp(base64.b64decode(s))+'\n')
    else:
        base64code(s+b64str[d],d+1)
        if b64str[d].isalpha():  
           base64code(s+b64str[d].lower(),d+1)