I got a syntax error during migration, functions Python3 to python2

Question

def create_msg(content: bytes) -> bytes:
size = len(content)
return encode_msg_size(size) + content


def encode_msg_size(size: int) -> bytes:
return struct.pack("<I", size)

I want to migrate this two functions from python3 to python2.7 but i got everytime a syntax error. Does somebody has any idea?

Error: File "__init__.py", line 4 def create_msg(content: bytes) -> bytes: SyntaxError: invalid syntax

Python 2's end of life was January 1, 2020 so it's best to stick to Python 3. Check your indents. — Axisnix, Jan 10 '21 at 14:04
Please, show your python2 code and full traceback you get. And why migrate back to python2? — buran, Jan 10 '21 at 14:04
I know, but I have a lot of code right now in Python2.7 and only want to add these two functions for now :) — Mr. Jim FPV, Jan 10 '21 at 14:06
@Mr.JimFPV, please [edit] your question instead of trying to put code into comments. — ChrisGPT was on strike, Jan 10 '21 at 14:10
Please show the python2 code, correctly formatted, and a full stack trace. — zvone, Jan 10 '21 at 14:11

score 1 · Accepted Answer · answered Jan 10 '21 at 14:07

1

Function Annotations were introduced in python 3 link. remove annotations from your code:

def create_msg(content):
    size = len(content)
    return encode_msg_size(size) + content

def encode_msg_size(size):
    return struct.pack("<I", size)

answered Jan 10 '21 at 14:07

mremne21

46
2

0xB00B · Answer 2 · 2021-01-10T14:17:13.363

0

You should provide your error

Btw Your indents are wrong

Corrected indents and code :-. (Not tested)

def create_msg(content):
    size = len(content)
    return bytes(encode_msg_size(size) + content)


def encode_msg_size(size):
    return bytes(struct.pack("<I", size))

that content : bytes format is not available in python 2

edited Jan 10 '21 at 14:17

answered Jan 10 '21 at 14:09

0xB00B

1,598
8
26

I got a syntax error during migration, functions Python3 to python2

2 Answers2