NewComer's question about standard lib usage, like os.listdir and os.popen

Yijun Zhu

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Oct 3, 2017, 11:15:15 AM10/3/17

to brython

Hello Brython experts

i am the newcomer for Brython, so i have some "stupid" question related to the usage of Brython's standard lib like OS

i wish i could list my local directory, then i could do some handling, like:

.....

</head>

from browser import document, alert

from browser.html import A,B,DIV

import os,re

fileList = os.listdir(os.getcwd())

names = str(fileList)

alert(names)

fileNames = os.popen("ls /home/user/folder").read()

alert(filenames)

#################

nothing popup by the vars,which seems Lib os did not work this style

but, some os operation is ok, like os.getcwd()

any comments are welcome!!

thanks

/Yijun

kikocorreoso

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Oct 3, 2017, 12:06:16 PM10/3/17

to bry...@googlegroups.com, Yijun Zhu

On 03/10/17 17:15, Yijun Zhu wrote:

Hello Brython experts

i am the newcomer for Brython, so i have some "stupid" question related to the usage of Brython's standard lib like OS

i wish i could list my local directory, then i could do some handling, like:

It is client-side javascript in the end so you are limited by the client. It is this way for safety reasons.

If you want to list the files in a dir you could connect to the backend (the computer where you want to list the files), let the backend (python, node, java, c#,...) perform the operations you want on the system and then send the results to the client-side.

User -> Browser -> Brython -> Backend (Python?) -> Brython -> Browser -> User

I hope it helps.

.....

<script type="text/javascript" src="brython.js"></script>

<script type="text/javascript" src="brython_stdlib.js"></script>

</head>

<body onload="brython()">

<script type="text/python">

from browser import document, alert

from browser.html import A,B,DIV

import os,re

fileList = os.listdir(os.getcwd())

names = str(fileList)

alert(names)

fileNames = os.popen("ls /home/user/folder").read()

alert(filenames)

#################

nothing popup by the vars,which seems Lib os did not work this style

but, some os operation is ok, like os.getcwd()

any comments are welcome!!

thanks

/Yijun

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Yijun Zhu

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Oct 3, 2017, 1:05:04 PM10/3/17

to brython

thanks kiko for your help

could you show me the simple example of "backend perform the operations and then send the results to the client-side."

like backend execute : os.getcwd() for the local path,

send the results to the client-side: send the local path to client-side

thanks,

/Yijun

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