[Tutor] checking connection to internet until success

[Pi]

Hi Tutor,

with this code i am getting actual date from internet. I need correct 
date, because i am not sure this set on computer is right.



import requests, time

try:
    OnLineDate = requests.get("http://just-the-time.appspot.com";).text[:10]
    OffLineDate = time.strftime("%Y-%m-%d")

    if OnLineDate == OffLineDate:

        do_something

    else:

        do_something_else


except requests.ConnectionError:
    print("Can not connect.")


But this code is run once. And i am stuck. Tries with while loop doesnt 
took any advance. I was thinking about something like after method used 
in tkinter, but still i cant figure out how do this. Can You guide me, 
how check connection to internet to check for every lets say 30 seconds 
until success?



Best regards

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[Tutor] os.walk() with multiple paths

[Pi]

Hello Tutor,

I'm stuck and i really need help. Google and I can't find answer for my 
problem. I've wrote app searching through directories database files. It 
works fine, but only for one path. And I need to use more than one path. 
This is my code:



import os

files = []

def find_db(paths):
    for path in paths.split():
    for root, dirs, filenames in os.walk(path):
    for name in filenames:
    if name.endswith((".db", ".sqlite", ".sqlite3")):
    files.append(name + ', ' + os.path.join(root, name))

    return sorted(set(files))


With one path given works great:

>>> find_db("/dbbs")
['april.db, /dbbs/analysis/april.db', 'important.sqlite, 
/dbbs/temp/important.sqlite', 'march.db, /dbbs/analysis/march.db', 
'weelky.sqlite3, /dbbs/analysis/queue/weelky.sqlite3']



But with more paths gives files only for last path given:

>>> find_db("/home/user/Desktop, /dbbs")
['april.db, /dbbs/analysis/april.db', 'important.sqlite, 
/dbbs/temp/important.sqlite', 'march.db, /dbbs/analysis/march.db', 
'weelky.sqlite3, /dbbs/analysis/queue/weelky.sqlite3']



I was trying to debug this code and I think problem is somewhere here:

    for path in paths.split():
    for root, dirs, filenames in os.walk(path):


Can You guide me where i've made mistake? os.walk() accepts one path to 
look, so was searching something like chain from itertools, or argparse. 
But none of them works. I couldn't find anything suits my needs. Is 
there some way do what i need without import anything else than os 
module? If not what I should search for?



Best Regards


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[Tutor] looking for a Python feature for computer teaching

[Pi Po]

As a teacher I find python simple and effective.

However, appreciate feedback from anyone who knows
of a Python version with this feature:

Want each interpreted line of code to introduce as a cells on
a spreadsheet window each new variable (or array) with its initialized
value,
and show the updated contents of each previously defined variable (or
array).

As a student types in a  line of code they will see how that
line  impacts old data and introduces new data.

This can now be done manually on a blackboard but is slow and tedious.

Here are two simple spreadsheets that show how it
might look for a student to step through their code:

https://docs.google.com/spreadsheets/d/1FkyzsT4VcGf9APE4IgHEYl4f6EI3C_DdUi_oD9K9shU/edit?usp=sharing

https://docs.google.com/spreadsheets/d/1mxIlScRBUa0Qtxg0G65Pw4FupeuDTDXQQbvpON7EH5M/edit?usp=sharing


If anyone knows another language (assembler, forth, C, J, ...)   which
already has this feature, appreciate a link.

But as syntax of Python is relatively clean and suited for instruction,
much prefer something in Python.


Cam Trenor
secondary math/science
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