# python实现各进制转换的总结大全

```
666C61677B65633862326565302D336165392D346332312D613031322D3038616135666137626536377D
```

```
import re
s='666C61677B65633862326565302D336165392D346332312D613031322D3038616135666137626536377D'
s = re.findall(r'.{2}',s)
s = map(lambda x:chr(int(x,16)),s)
print ''.join(s)
>>>
flag{ec8b2ee0-3ae9-4c21-a012-08aa5fa7be67}
```

binascii库的hexlify()和b2a_hex()

int函数

```
int(str,base) //返回十进制整数,但注意此时第一个参数为字符串
```

```
bin() //10进制转二进制

oct() //十进制转八进制

hex() //十进制转十六进制
```

```
map(lambda x:hex(int(x,2)),['0011']) //lambda表达式
```

```
[hex(int(x,2)) for x in ['0011']] //列表解析
```

```
map(lambda x:bin(int(x,16)),['ef'])
```

```
# make by 江sir
#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()
argv = parser.parse_args()
#print argv
if argv.b:
res = bintostr(argv.b)
elif argv.a:
res = asciitostr(argv.a)
elif argv.x:
res = hextostr(argv.x)
print res
```

666C61677B65633862326565302D336165392D346332312D613031322D3038616135666137626536377D

```
bintostr.py -x "666C61677B65633862326565302D336165392D346332312D613031322D3038616135666137626536377D"
flag{ec8b2ee0-3ae9-4c21-a012-08aa5fa7be67}
```

00101111 01100110 00110110 00110111 00110011 00110010 00110100 00110001 00110000 01100001 01100001 01100100 01100011 00110000 00110011 00110111 01100110 01100010 00110000 01100011 01100010 01100001 01100001 00110000 00110000 01100011 00110111 00110101 00110011 00110001 00110011 00110111 00110011 00101110 01110100 01111000 01110100

```
bintostr.py -b "00101111 01100110 00110110 00110111 00110011 00110010 00110100 00110001 00110000 01100001 01100001 01100100 01100011 00110000 00110011 00110111 01100110 01100010 00110000 01100011 01100010 01100001 01100001 00110000 00110000 01100011 00110111 00110101 00110011 00110001 00110011 00110111 00110011 00101110 01110100 01111000 01110100"
```

ascii转字符串

s='45 46 45 46 32 45 32 46 46 45 46 32 46 45 46 46 32 46 46 46 32 45 46 46 46 32 46 46 45 45 46 45 32 45 46 46 46 32 46 46 46 32 46 45 46 46 32'

```
bintostr.py -a "45 46 45 46 32 45 32 46 46 45 46 32 46 45 46 46 32 46 46 46 32 45 46 46 46 32 46 46 45 45 46 45 32 45 46 46 46 32 46 46 46 32 46 45 46 46 32"
-.-. - ..-. .-.. ... -... ..--.- -... ... .-..
```

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