problem in using mypy

[akbarza]

hi snppsat
i replied to you, but my net disconnected and my reply was killed.
good news: i did as you said step by step and I reached to:

Output:
(new_env) c:\code\new_env>mypy --version
mypy 1.5.1 (compiled: yes)

also i copied example1 in C:\code\new_env and then :

C:\WINDOWS\system32>cd C:\code\new_env

Output:
C:\code\new_env>mypy example1.py
example1.py:5: ←[1m←[91merror:←[0m Argument 1 to ←[0m←[1m"slice"←[0m has incompatible type ←[0m←[1m"list[int]"←[0m; expe
cted ←[0m←[1m"str"←[0m  ←[0m←[93m[arg-type]←[0m
←[1m←[91mFound 1 error in 1 file (checked 1 source file)←[0m

C:\code\new_env>

thanks

hi
what i did in cmd( :
c:\ pip install mypy --upgrade --no-cache-dir --force-reinstall
After running the above: I closed and opened cmd and :

Error:
C:\WINDOWS\system32>cd /d D:\14020412_enteghal\akb_python\akb_py_projects

D:\14020412_enteghal\akb_python\akb_py_projects>mypy example1.py
D:\14020412_enteghal\akb_python\akb_py_projects\__init__.py: error: INTERNAL ERROR -- Please try using mypy master on Gi
tHub:
https://mypy.readthedocs.io/en/stable/common_issues.html#using-a-development-mypy-build
If this issue continues with mypy master, please report a bug at https://github.com/python/mypy/issues
version: 1.5.1
D:\14020412_enteghal\akb_python\akb_py_projects\__init__.py: : note: please use --show-traceback to print a traceback wh
en reporting a bug

D:\14020412_enteghal\akb_python\akb_py_projects>

I have shame for more questions, but what's the problem? how can correct it?

[snippsat]

When it work in virtual enviroment,then there is problem with your OS Python.
As mention mypy example1.py --show-traceback to see more of the error.
Eaiset just remove Python and reinstall,also the long default path c:\users\akbar\appdata\local\programs\python\python311
Can chooise someting simpler,i just use C\python311,look at installation under Windows

also i copied example1 in C:\code\new_env and then :

C:\WINDOWS\system32>cd C:\code\new_env

No no,you don't copy out from virtual environment to try to fix stuff outside of it.

[akbarza]

hi snippsat
I uninstalled Python and installed it again and it works. but i have some questions.
my question:
First:
in your last reply, you had written this term:

mypy example1.py --show-traceback 

.
for this --show-traceback, how can i know that a command( e.g. mypy) has such tails like this?(I do not know what is called this, so I named it tail.) and what tails does it have? what thing do i search for it in google?

Second: I copied example1.py file on my desktop and in cmd after changing path
and writing

 mypy example1.py

, i have:

C:\WINDOWS\system32>cd/d C:\Users\akbar\Desktop\1

C:\Users\akbar\Desktop\1>mypy example1.py
example1.py:5: ←[1m←[91merror:←[0m Argument 1 to ←[0m←[1m"slice"←[0m has incompatible type ←[0m←[1m"list[int]"←[0m; expe
cted ←[0m←[1m"str"←[0m ←[0m←[93m[arg-type]←[0m
←[1m←[91mFound 1 error in 1 file (checked 1 source file)←[0m


I think mypy acted correctly, but I do not understand these expressions such as 0m, 1m, 91m and ... .
can explain to me or introduce to me a reference?
thanks

[deanhystad]

how can i know that a command( e.g. mypy) has such tails like this?

Ask for help. Almost all command line tools provide help.

Output:
(env) > mypy
usage: mypy [-h] [-v] [-V] [more options; see below]
            [-m MODULE] [-p PACKAGE] [-c PROGRAM_TEXT] [files ...]
mypy: error: Missing target module, package, files, or command.
(env) > mypy -h
usage: mypy [-h] [-v] [-V] [more options; see below]
            [-m MODULE] [-p PACKAGE] [-c PROGRAM_TEXT] [files ...]

... much more to follow

[snippsat]

I think mypy acted correctly, but I do not understand these expressions such as 0m, 1m, 91m and ... .
can explain to me or introduce to me a reference?

That because cmd is bad command shell and can not display color.
I would advice to use cmder ,here how same code look in cmder.

Also using Rich-CLI then also get color when view files

[akbarza]

hi
First: I have another problem related to mypy but I did not know that I must create a new thread or continue to this thread. so I am writing here.
As you read this thread from the first, I recently reinstalled Python and it has been installed in C:\python_3_11_5 .
but I save my Python files in D:\14020412_enteghal\akb_python\akb_py_projects\

in the code( reference to site containing this code is in first line and i saved this code in my pc as fib.py):

# from https://www.geeksforgeeks.org/function-annotations-python/

# Python program to print Fibonacci series
def fibo(n:'int', output:'list'=[])-> 'list':
    if n == 0:
        return output
    else:
        if len(output)< 2:
            output.append(1)
            fibo(n-1, output)
        else:
            last = output[-1]
            second_last = output[-2]
            output.append(last + second_last)
            fibo(n-1, output)
        return output
print(fibo(5))

When I run it in idle shell 3.11.5, it is okay and print in output :

Output:
[1, 1, 2, 3, 5]

Also when I run it from cmd, I take the above
but when i write mypy fib.py in cmd , an error message is shown:

Error:
D:\14020412_enteghal\akb_python\akb_py_projects>mypy fib.py
__init__.py: error: source code string cannot contain null bytes  [syntax]
Found 1 error in 1 file (errors prevented further checking)

D:\14020412_enteghal\akb_python\akb_py_projects>

I searched the net but I did not find a solution. (I also found and read https://python-forum.io/thread-40466.html, but it is not related to my problem).
What is the problem? and why it is related to __init__.py?
Thanks for any guidance.

[akbarza]

hi
there was the file __iinit__.py in D:\14020412_enteghal\akb_python\akb_py_projects\ .
when i deleted it, the erro was solved :
after deleting __init__.py in above directory:

Error:
D:\14020412_enteghal\akb_python\akb_py_projects>mypy fib.py
Success: no issues found in 1 source file

D:\14020412_enteghal\akb_python\akb_py_projects>

but what relation eas between mypy and __init__.py?

[snippsat]

but what relation eas between mypy and __init__.py?

It's more about how Python search for for files,it first search for built-in module or eg your packages/modules.
If have __init__.py in a folder(Python think it's a module) if will find that first,before it find fib.py.

When I run it in idle shell 3.11.5, it is okay and print in output :

Output:
[1, 1, 2, 3, 5]

It's important to note that type annotations in Python are purely optional,
and do not affect the runtime behavior of your code.
They are simply a way to provide additional information tools that can help improve the quality and maintainability of your code