Python BinaryConversion

#coding:utf-8
import re
import argparse
  
def bintostr(text):
    text = text.replace(' ','')
    text = re.findall(r'.{8}',text)
    s = map(lambda x:chr(int(x,2)),text) #批量二进制转十进制
    flag = ''.join(s)
    return (flag)
  
def asciitostr(text):
    if ' ' in text:
        text = text.split(' ')
    elif ',' in text:
        text = text.split(',')
    s = map(lambda x:chr(int(x)),text)
    flag = ''.join(s)
    return flag
  
def hextostr(text):
    text = re.findall(r'.{2}',text)
    #print text
    s = map(lambda x:chr(int(x,16)),text)
    #print s
    flag = ''.join(s)
    return flag

  
if __name__ == '__main__':
    parser = argparse.ArgumentParser()
    parser.add_argument("-b")
    parser.add_argument("-a")
    parser.add_argument("-x")
    argv = parser.parse_args()
    #print argv
    if argv.b:
        res = bintostr(argv.b)
        print (res)
    elif argv.a:
        res = asciitostr(argv.a)
        print (res)
    elif argv.x:
        res = hextostr(argv.x)
        print (res)