We Keep Coding

Setting CWDir as a variable for MS-Dos environment

Can someone help me with this please?
I am trying to compile a program in this case programmed in python that I can run in win9Xdos, that I can call/start from a 9xDos batchfile, that will find the Current working Dir & by that I mean identify the cwd (current working directory) from where the python program and batchfile are executed. The python program will be called getcwd.py which I am hoping someone will outline what I need to do to convert to EXE/COM file. there is a program called Py2EXE but not sure if this will compile for Ms-dos file. Anyways heres my simple code thus far. Can someone tell me if I am on the right track please? Oh by the way what I am trying to do is find the CWD & inject the resultant path into a variable that can be read from 9Xdos. The current Var would be %cwd%
# importing os module
import os
# some websites say use: del cwd (to remove variable if it exists)
cwd = none
cwd = os.getcwd()
print(cwd)
The print line may need interchanging with code below, not sure help needed:
print(type(path))
# <class 'str'>
would the above code work, say in the root e.g. C:\ with & work in obtaining the CWD variable & if correct how would I proceed to compile it to an exe/com file? do I need to take into account LFN's & Spaces between possible paths e.g C:\Program Files & possible backslashes etc?

Your code isn't perfect but it is on the right track. All you need is this:
import os
if __name__ == '__main__':
print(os.getcwd())
There is no need for an auxiliary variable, and I don't know what websites are recommending that you delete the variable before creating it. Trying to delete a nonexistent Python variable is a runtime error. So I would stay away from those websites.
But your question is about setting an environment variable. Calling print() won't do that. All it will do is echo the current working directory to the console. There is no way to change the environment of a running process that will affect the parent process. This is not a Python restriction nor a Windows restriction: it is quite general. The OS sets up the environment of the process when it creates the process. You can make changes to the environment (using os.environ[env-var]) but those changes will only be visible inside that Python process and will not be visible to the environment of the batch file that runs the Python program. To do that, you need to pass the value back to the calling process.
One way to do that is like this:
In Python:
import os
if __name__ == '__main__':
print(f"set CWDIR={os.getcwd()}", file=open("mycd.bat","w"))
I haven't had a Python 1.5.2 environment for 15 years, so I can't test this, but I think the equivalent would have been
if __name__ == '__main__':
print >> open("mycd.bat","w"), "set CWDIR=%s" % (os.getcwd(),)
In a cmd.exe console:
call mycd.bat
Though if your Win9XDos doesn't provide %cd% (which, as far as I recall, was available in MS-DOS 5, or maybe further back still) there is no way of telling if it supports call either. (Are you maybe running command.com instead of cmd.exe? That would explain why things that should be there are missing).
I used pyinstaller to create a 64-bit .exe and that resulted in a file of about 6MB. Now, 32-bit executables are smaller, but it might be that the resulting executable is still too big to load.
So I think the Python route may turn out to be more trouble than it is worth.

Python Scripts + Use of folders and paths

This time I need help with python and paths manipulations. In first place i will will show you the structure im using on this set of apps:
MainFolder:
Folder1.
Subfolder1.
Subfolder2.
Folder2.
The folder I have the scripts in, is Folder 2. But i need the path to Main Folder(1 back from Folder2). But the method i'm using, isn't quite reliable.
Currently i'm using os.getcwd(), but if I lunch a shell trought an Excel Macros, the path breaks. From time to time the code brakes(often in loops that use paths).
I need to lunch said scripts trought Excel or at least CMD. Because this will be for People who knows just enough about computers to make it every day. And it need to operate on everyone machines.
PS: The scripts works just fine, but they do need to be in a separate folder from the files they are working on.
UPDATE 1 AS REQUESTED:
I've made a class and this is the class
class mypath:
def Revpath(self):
CWD = os.getcwd()
Revpaths = CWD[:-14]
return Revpaths
def Saldos(self):
CWD = os.getcwd()
Revpaths = CWD[:-14]
Cuadraje = Revpaths+"Stock\\Saldos"
return Cuadraje
def Banco(self,IDkind):
CWD = os.getcwd()
Revpaths = CWD[:-14]
Stocks = Revpaths+"Stock\\kind\\"+IDkind
return Stocks
mp = mypath()
Then I just assign the returned value to a Var. One is used on a CSV writter(Wich happens to be the most common miss path). And the other to set a download folder, for a firefox profile. Each script uses the same Class, and the logic is 100% the same on every script. But i only can show you this much, because the code on itself is messy and have sensitive data in it.
UPDATE 2: SOLVED
Solved this by replacing os.getcwd() for os.path.realpath(__file__)
Because of language (First Lanaguage is Spanish), I've assumed that the Current Working Directory was the one with the script, instead it returned the PyCharm Settings folders(I'm still clueless about this, cus' i'm launching the scripts trough a Shell from a excel macross button).
Also i've updated the code on the class i've presented above, for stability in my applications.

Pass variable to python function from bash script

I am really struggling trying to figure out to pass variables from a bash script to a python function I have made. I have looked over numberous posts about the same issue and cant seem to understand what I am missing.
I have a python function script named fname_function.py:
from glob import glob
import os
import sys
first_arg=sys.argv[1]
second_arg=sys.argv[2]
third_arg=sys.argv[3]
def gFpath(reach,drive,date):
list1 = glob(os.path.normpath(os.path.join(drive, reach, date,'*')))
list2 =[]
for afolder in list1:
list2.append(glob(os.path.normpath(os.path.join(drive, reach, date, afolder, 'x_y_class?.asc'))))
return list2
if __name__=='__main__':
gFpath(first_arg,second_arg,third_arg)
And my bash script looks like:
reach="R4a"
drive= "D:\\"
dte="2015_04"
fnames=$(python fname_function.py "$reach" "$drive" "$dte")
for fname in $fnames; do echo "Script returned $fname"; done
The variables are being passed to the python script, but I cant seem to get list2 back to my shell script.
Thanks,
Dubbbdan

You can just run the Python file directly, like python fname_function.py "$reach" "$drive" "$dte"
However, sys.argv[0] will be fname_function.py in this case, so you'll want to set first_arg to sys.argv[1] and increment the other numbers as well.
Also, you don't output anything in your Python script. You should make the end of your script read:
if __name__=='__main__':
fnames = gFpath(first_arg,second_arg,third_arg)
for fname in fnames:
print(fname)
which will print out 1 result from gFpath on each line.

Running a script from another python

I just want to have some ideas to know how to do that...
I have a python script that parses log files, the log name I give it as an argument so that when i want to run the script it's like that.. ( python myscript.py LOGNAME )
what I'd like to do is to have two scripts one that contains the functions and another that has only the main function so i don't know how to be able to give the argument when i run it from the second script.
here's my second script's code:
import sys
import os
path = "/myscript.py"
sys.path.append(os.path.abspath(path))
import myscript
mainFunction()
the error i have is:
script, name = argv
valueError: need more than 1 value to unpack

Python (just as most languages) will share parameters across imports and includes.
Meaning that if you do:
python mysecondscript.py heeey that will flow down into myscript.py as well.
So, check your arguments that you pass.
Script one
myscript = __import__('myscript')
myscript.mainfunction()
script two
import sys
def mainfunction():
print sys.argv
And do:
python script_one.py parameter
You should get:
["script_one.py", "parameter"]

You have several ways of doing it.
>>> execfile('filename.py')
Check the following link:
How to execute a file within the python interpreter?

Running Python script from .BAT file, taking .BAT Filename as input

I got a Python script (test1.py) I need to run with a bat file (render.bat).
Question 1:
First, I had a definition in my test1.py and it always failed to run, nothing happened. Can someone kindly explain why?
import os
def test01 :
os.system('explorer')
and in the bat file:
python c:/test01.py
but as soon as I removed the def it worked. I just want to learn why this happened.
Question 2:
How can I take "render" string from render.bat as a string input for my python script so I can run something like :
import os
def test1(input) :
os.system("explorer " + input)
So the "input" is taken from the .BAT filename?

Functions don't actually do anything unless you call them. Try putting test01() at the end of the script.
%0 will give you the full name of the batch file called, including the .bat. Stripping it will probably be easier in Python than in the batch file.

Question1: Keyword def in python defines a function. However, to use a function you have to explicitly call it, i.e.
import os
def test01(): # do not forget ()
os.system('explorer')
test01() # call the function

1) You have to actually call the functions to achieve your task.
2) %0 refers to the running script. Therefor create a test.bat file like
# echo off
echo %0
Output = test.bat
You can strip the .bat extension from the output.