用于将纯文本 (ASCII) 转换为 GSM 7 位字符集的 Python 库？
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Python library for converting plain text (ASCII) into GSM 7-bit character set?
提问by M K Saravanan
Is there a python library for encoding ascii data to 7-bit GSM character set (for sending SMS)?
是否有用于将 ascii 数据编码为 7 位 GSM 字符集（用于发送 SMS）的 python 库？
回答by John La Rooy
There is now :)
现在有:)
Thanks to Chadfor pointing out that this wasn't quite right
感谢Chad指出这不太正确
Python2 version
Python2版本
# -*- coding: utf8 -*-
gsm = (u"@￡$￥èéùìò?\n??\r??Δ_ΦΓΛΩΠΨΣΘΞ\x1b???é !\"#¤%&'()*+,-./0123456789:;<=>"
u"??ABCDEFGHIJKLMNOPQRSTUVWXYZ???ü§?abcdefghijklmnopqrstuvwxyz???üà")
ext = (u"````````````````````^```````````````````{}`````\````````````[~]`"
u"|``````````````````````````````````````````````````````````````")
def gsm_encode(plaintext):
res = ""
for c in plaintext:
idx = gsm.find(c)
if idx != -1:
res += chr(idx)
continue
idx = ext.find(c)
if idx != -1:
res += chr(27) + chr(idx)
return res.encode('hex')
print gsm_encode(u"Hello World")
The output is hex. Obviously you can skip that if you want the binary stream
输出为十六进制。显然，如果你想要二进制流，你可以跳过它
Python3 version
Python3版本
# -*- coding: utf8 -*-
import binascii
gsm = ("@￡$￥èéùìò?\n??\r??Δ_ΦΓΛΩΠΨΣΘΞ\x1b???é !\"#¤%&'()*+,-./0123456789:;<=>?"
"?ABCDEFGHIJKLMNOPQRSTUVWXYZ???ü§?abcdefghijklmnopqrstuvwxyz???üà")
ext = ("````````````````````^```````````````````{}`````\````````````[~]`"
"|``````````````````````````````````````````````````````````````")
def gsm_encode(plaintext):
res = ""
for c in plaintext:
idx = gsm.find(c);
if idx != -1:
res += chr(idx)
continue
idx = ext.find(c)
if idx != -1:
res += chr(27) + chr(idx)
return binascii.b2a_hex(res.encode('utf-8'))
print(gsm_encode("Hello World"))
回答by Jimmy Ilenloa
I got tips from gnibbler's answer. Here is a script I somehow made up after looking at an online converter: http://smstools3.kekekasvi.com/topic.php?id=288, and it works correctly for me. Both encoding and decoding.
我从 gnibbler 的回答中得到了提示。这是我在查看在线转换器后以某种方式编写的脚本：http: //smstools3.kekekasvi.com/topic.php?id=288，它对我来说工作正常。既编码又解码。
#!/usr/bin/env python
# -*- coding: utf-8 -*-
gsm = (u"@￡$￥èéùìò?\n??\r??Δ_ΦΓΛΩΠΨΣΘΞ\x1b???é !\"#¤%&'()*+,-./0123456789:;<=>"
u"??ABCDEFGHIJKLMNOPQRSTUVWXYZ???ü`?abcdefghijklmnopqrstuvwxyz???üà")
ext = (u"````````````````````^```````````````````{}`````\````````````[~]`"
u"|``````````````````````````````````````````````````````````````")
def get_encode(currentByte, index, bitRightCount, position, nextPosition, leftShiftCount, bytesLength, bytes):
if index < 8:
byte = currentByte >> bitRightCount
if nextPosition < bytesLength:
idx2 = bytes[nextPosition]
byte = byte | ((idx2) << leftShiftCount)
byte = byte & 0x000000FF
else:
byte = byte & 0x000000FF
return chr(byte).encode('hex').upper()
return ''
def getBytes(plaintext):
if type(plaintext) != str:
plaintext = str(plaintext)
bytes = []
for c in plaintext.decode('utf-8'):
idx = gsm.find(c)
if idx != -1:
bytes.append(idx)
else:
idx = ext.find(c)
if idx != -1:
bytes.append(27)
bytes.append(idx)
return bytes
def gsm_encode(plaintext):
res = ""
f = -1
t = 0
bytes = getBytes(plaintext)
bytesLength = len(bytes)
for b in bytes:
f = f+1
t = (f%8)+1
res += get_encode(b, t, t-1, f, f+1, 8-t, bytesLength, bytes)
return res
def chunks(l, n):
if n < 1:
n = 1
return [l[i:i + n] for i in range(0, len(l), n)]
def gsm_decode(codedtext):
hexparts = chunks(codedtext, 2)
number = 0
bitcount = 0
output = ''
found_external = False
for byte in hexparts:
byte = int(byte, 16);
# add data on to the end
number = number + (byte << bitcount)
# increase the counter
bitcount = bitcount + 1
# output the first 7 bits
if number % 128 == 27:
'''skip'''
found_external = True
else:
if found_external == True:
character = ext[number % 128]
found_external = False
else:
character = gsm[number % 128]
output = output + character
# then throw them away
number = number >> 7
# every 7th letter you have an extra one in the buffer
if bitcount == 7:
if number % 128 == 27:
'''skip'''
found_external = True
else:
if found_external == True:
character = ext[number % 128]
found_external = False
else:
character = gsm[number % 128]
output = output + character
bitcount = 0
number = 0
return output
回答by sanjeev
I faced a similar issue recently where we were getting gsm7bit decoded text messages, mostly for Verizon carrier with Spanish characters, from the aggregator and we were not able to decode it successfully. Here is the one I created with the help of other answers in the forum. This is for Python 2.7.x.
我最近遇到了一个类似的问题，我们从聚合器获取 gsm7bit 解码的文本消息，主要是针对带有西班牙语字符的 Verizon 运营商，但我们无法成功解码它。这是我在论坛中其他答案的帮助下创建的。这适用于 Python 2.7.x。
def gsm7bitdecode(text):
gsm = (u"@￡$￥èéùìò?\n??\r??Δ_ΦΓΛΩΠΨΣΘΞ\x1b???é !\"#¤%&'()*+,-./0123456789:;<=>"
u"??ABCDEFGHIJKLMNOPQRSTUVWXYZ???ü`?abcdefghijklmnopqrstuvwxyz???üà")
ext = (u"````````````````````^```````````````````{}`````\````````````[~]`"
u"|``````````````````````````````````````````````````````````````")
text = ''.join(["{0:08b}".format(int(text[i:i+2], 16)) for i in range(0, len(text), 2)][::-1])
text = [(int(text[::-1][i:i+7][::-1], 2)) for i in range(0, len(text), 7)]
text = text[:len(text)-1] if text[-1] == 0 else text
text =iter(text)
result = []
for i in text:
if i == 27:
i = next(text)
result.append(ext[i])
else:
result.append(gsm[i])
return "".join(result).rstrip()
回答by Pratik Deoghare
I could not find any library. But I think this should not need a library. Its somewhat easy to do.
我找不到任何图书馆。但我认为这应该不需要图书馆。它有点容易做到。
Hereis Jon Skeethimself on the same topic.
这是Jon Skeet本人在同一主题上的发言。
Example:
例子：
s = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
def ascii_to_gsm(ch):
return bin(65 + s.index(ch))
print ascii_to_gsm('A')
print '--'
binary_stream = ''.join([str(ascii_to_gsm(ch))[2:] for ch in s])
print binary_stream
You can also use dictto store mapping between ASCII and GSM 7-bit character set.
也可以dict用来存储ASCII 和 GSM 7 位字符集之间的映射。
