I couldn’t connect to my raspberry pi for several days. Today I conducted a trouble shooting. 

At beginning, I think system is down due to flashcard broken but later I found raspyberry still has ipv4/ipv6 address from home router. I tried to ssh but not successful. I ping the server first, ping is Ok. Then I could ssh server successfully.

it seems i am not the only guy who has this issue, see 

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• Docstring Linter

• pydocstyle

• Style Linter

• pylint
• pycodestyle

• Error Linter:

• pyflake
• pylint

• Complexity Analysis

• mccabe

• flake8

• flake8 = Pyflakes + pycodestyle + mccabe

• type checker:

• mypy

• run it on command line
• run it with language server, for example: pylsp
• run it with Jupyter

• nb-mypy: configure it with ipython configuration or run it with command in jupyter

• jupyter-lsp + pylsp

• Language server

• pyls and pylsp
• prefer to use pylsp instead of pyls, seelink for detail.

• difference between different linter tools

• Pylint vs Pyflakes vs Flake8 vs autopep8 vs Bandit vs Prospector vs Pylama vs Pyroma vs Black vs Mypy vs Radon vs mccabe

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racket is one of scheme dialect and I want to use racket to learn “the litte schemer”. One of problem I meet is how to load file with scheme code (not racket code) into REPL and run relate function. In guile, it is very simple: guile -l my_function.scm. but in racket, it is little complex.

• with load (traditional scheme file, no #lang)

 it could work “racket -if <my_function.scm>” but my_function.scm should not start with “#lang racket”. it is same with load function. 

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