Necessary imports not included in Lark standalone parsers.

[shiyunon]

Describe the bug

To generate Lark standalone parsers for users (those users using python -m lark.tools.standalone), in lark/tools/standalone.py, necessary file sections are included in the final standalone parser. These necessary files are defined on line 56 in lark/tools/standalone.py in the Python list EXTRACT_STANDALONE_FILES. This list includes visitors.py (on line 61). The included section of visitors.py (in any standalone parsers) is from line 10 to line 518 (of visitors.py). However, on line 431 of visitors.py, update_wrapper function is used, but the import line from functools import wraps, update_wrapper is on line 3 of visitors.py and not in the included section (line 10-518 of visitors.py) in the generated standalone parser. Thus, a bug can be generated if line 431 is called in any standalone parsers.

[erezsh]

You're right. It will happen if you try to decorate a class with v_args, which I guess no one has tried with the standalone parser yet.

Good catch!

[erezsh]

Should be solved in master. I'll probably make a v1.1 release in the coming weeks.