How to import Python from relative path

For example, we have a file with the following structure:

pkg/
  __init__.py
  libs/
    some_lib.py
    __init__.py
  components/
    code.py
    __init__.py

if we want to call in code.py libs/some_lib.py module, such as using relative call: from.. Libs.some_lib import something, it is not enough simply to add /___ to the package. Py . Python returns the error ValueError: first import in non-package. So how do you solve this problem?

has the following solution:

Add the current path to sys.path

considering that compontent and libs are folders at the same level, we can add the following code directly in code.py to add the parent folder of the current folder to the system path.

import sys
from os import path
sys.path.append( path.dirname( path.dirname( path.abspath(__file__) ) ) )

or the following (this is true for any relational folder, as long as we give the absolute path to the folder in lib_path) :

import os, sys
lib_path = os.path.abspath(os.path.join('..'))
sys.path.append(lib_path)

so we can import something with from libs.some_lib import something.

executes the code in package mode:

python -m pkg.components.code

and then we can use from.. Libs.some_lib import something to import.

note that you don’t need .py to end the file.

From: 

https://programmerah.com/how-to-import-python-from-relative-path-1066/

summary

we can actually combine these two approaches:

if __name__ == '__main__':
    if __package__ is None:
        import sys
        from os import path
        sys.path.append( <path to the package> )
       from libs.some_lib import something
    else:
        from ..libs.some_lib import something

Golang gets the list of files under the folder

golang document it is easier to find a method is filepath. Walk, this method has a problem of the current directory is automatically recursive traversal subdirectory, in fact, we usually just want to get a directory file list below, does not need so much information, at the same time this method is much more complicated to write code, we have no need to do so.

if you simply want to get a list of files and folders under a directory, there are two easy ways to do

Source from : 

https://programmerah.com/golang-gets-the-list-of-files-under-the-folder-1768/

USES ioutil’s ReadDir method

package main

import (
    "fmt"
    "io/ioutil"
)

func main() {
    files, _ := ioutil.ReadDir("./")
    for _, f := range files {
            fmt.Println(f.Name())
    }
}

using filepath Glob method

package main    

import (
    "fmt"
    "path/filepath"
)

func main() {
    files, _ := filepath.Glob("*")
    fmt.Println(files) // contains a list of all files in the current directory
}

Kobe V Shoes -11 Players Attended The All-Star Game

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resource from 

www.nba2kshop.com

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