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python - error occurs on relative path but not absolute path in macOS

I'm having a strange issue. I'm just trying to do a basic show directory contents for relative path.
Created a test directory on the desktop
test directory contents
test.py
test1 -- folder
sample.txt
contents of test.py
import os
dataDir = "test1"
for file in os.listdir("/Users/username/Desktop/test"):
print(file)
Summary - absolute path
works - in visual studio code
works - macOS terminal python3 /Users/username/Desktop/test/test.py
however when use the variable I get an error:
contents of test.py
import os
dataDir = "test1"
for file in os.listdir(dataDir):
print(file)
Summary - relative path
works - in visual studio code
ERROR - macOS terminal python3 /Users/username/Desktop/test/test.py
Traceback (most recent call last):
File "/Users/username/Desktop/test/test.py", line 4, in
for file in os.listdir(dataDir):
FileNotFoundError: [Errno 2] No such file or directory: 'test1'

I all depends on what folder you are in when you launch the code.
Let's say your .py file is in folder1/folder2/file.py and your test1 folder is folder1/folder2/test1/.... You open a terminal in the folder1 and launch python3 /folder2/file.py. The program is going to check for files in folder1/test1/.
Try navigating to the actual file folder, that should work. If you want to use it wherever you launch the code you will have to do some checks on the current directory and manually point the code to the wanted path.

The following solution is inspired by that answer
A simple way to solve your problem is to create the absolute path. (I recommend using that always when you're working with different directories and files)
First of all, you need to care about your actual working directory. While using VS Code your working directory is in your desired directory (/Users/username/Desktop/test/).
But if you use the command line your actual working directory may change, depending where you're calling the script from.
To get the path where script is actually located, you can use the python variable __file__. __file__ is the full path to the directory where your script is located.
To use your script correctly and being able to call it using both ways, the following implementation can help you:
import os
dataDir = "test1"
# absolute path to the directory where your script is in
scriptDir = os.path.dirname(__file__)
# combining the path of your script and the 'searching' directory
absolutePath = os.path.join(scriptDir, dataDir)
for file in os.listdir(absolutePath):
print(file)

python code can't find file while its in folder marked as resource root in PyCharm

In PyCharm, I created folder named test, created txt file named test inside and marked folder as content root. When I added python file outside the test folder and tried to access test.txt file with open it suggested me file name. But when I tried running the code it couldn't find the file.
Traceback (most recent call last):
File "/home/elmo/PycharmProjects/TBC_PAY_API_TESTING/testing.py", line 32, in <module>
print(open("test.txt").read())
FileNotFoundError: [Errno 2] No such file or directory: 'test.txt'
This is how the code and folders look like ( ingore the trash folder)
How can I fix it? The main reason I am doing this is to avoid writing full path's for accessing file.

You are talking about two totally different things in your question. If you mark a folder as Sources root that means the Python interpreter will be able to find the modules in that folder.
For example:
When you write an own module and you want to use it in another file the Python won't find it automatically. The PYTHONPATH should contain the path of the folder which contains your module. And actually the Sources root option does this!
The other thing what you have mentioned in your question is that you don't provided a correct path in your code. It is a real error. In your code, you have to provide the correct path for open. The Pycharm is an IDE but your (or other's) Python interpreter will use your code.
You can solve your problem in many ways.
For example:
You can hard-code the path of your txt (It is totally not recommended):
print(open("/home/elmo/PycharmProjects/TBC_PAY_API_TESTING/test/text.txt").read())
You can use relative path:
print(open("test/text.txt").read())
You can use full path based on your Python file (I recommend this solution):
import os
dir = os.path.realpath(os.path.dirname(__file__)) # Directory of your Python file
file_path = os.path.join(dir, "test", "test.txt") # Create the path of the file
print(open(file_path).read())

Call a file in another folder in Eclipse for Python project

I have a small enough Python project in Eclipse Neon and keep getting the same error and can't find proper documentation on how to solve. In my main I need to call a file that is located in another folder. The error I receive is IOError: [Errno 2] No such file or directory:
I have an empty init.py file in the folder (XML_TXT) that I'm trying to use.

It looks like Groovy is importing okay, or else you would get an ImportError. An IOError indicates that it can't find "test.txt". Does that file exist?
It will work if the file path is relative to where you are running the script from. So for example if test.txt is in a folder
Groovy("folder_name/test.txt")
You can also go up in the directory structure if you need to, for example
Groovy("../folder_name/test.txt")
Or, if you want to be able to run the file from anywhere, you can have python work out the absolute path of the file for you.
import os
filename = os.path.join(os.path.dirname(__file__), 'folder_name/test.txt')
u = Groovy(filename)

Why does not Atom recognize other files in the same directory?

I want to use some text files that I have in the same directory in my script. But Atom always gives me this error
FileNotFoundError: [Errno 2] No such file or directory: 'comments.txt'
[Finished in 0.156s]
Anyone know how to fix this?
This is my code
with open('comments.txt', 'r') as f:
myNames = [line.strip() for line in f]
print(myNames)
It works on other IDE's such as Pycharm and sublime text. I also tried it on the python idle.
In Atom, it only works when I give it the full path. But I want it to only use the project path.

If you are using the Script package, go to File>Settings (or CTRL+,) then open the Packages tab. Find script and open its Settings menu. The first setting is "Change Current Working Directory (CWD) Behavior." Change the value from "First project directory" to "Directory of script."

It could be that atom changes a file path.
Run a file or command to check
import os
print(os.getcwd())
This will tell you which dir you are working from.
Use this in your script to change dir
os.chdir(PATH_TO_DIR)
or write full file path

Change working directory in Python on Windows with backslash

I would like to change my working directory in Python. I am on Windows programming in the Sublime IDE. I am using Python 2.7.
The path I would like, harvested directly from my windows explorer, is:
\\CNYC19P20003D\khandler$\Documents\ShortSqueeze
I am aware of the function os.chdir("path").
However, it seems I am having issues with the fact that Python uses '\' as an escape key, and Windows uses '\' to move a folder level down. Here is what I have so far:
import os
if __name__ == '__main__':
path = os.getcwd()
print "Current working directory:"
print path
os.chdir("M:\CNYC19P20003D\khandler$\Documents\ShortSqueeze")
file_object = open("rawData.txt", 'r')
The output of this code is the following:
'\\CNYC19P20003D\khandler$\Documents\ShortSqueeze'
CMD.EXE was started with the above path as the current directory.
UNC paths are not supported. Defaulting to Windows directory.
Current working directory:
C:\Windows
Traceback (most recent call last):
File "\\CNYC19P20003D\khandler$\Documents\ShortSqueeze\practice.py", line 9, in <module>
file_object = open("rawData.txt", 'r')
IOError: [Errno 2] No such file or directory: 'rawData.txt'
Here is what I have tried so far:
os.chdir("M:\\CNYC19P20003D\khandler$\Documents\ShortSqueeze")
os.chdir("\\CNYC19P20003D\khandler$\Documents\ShortSqueeze")
os.chdir("//CNYC19P20003D/khandler$/Documents/ShortSqueeze")
os.chdir("\\CNYC19P20003D\\khandler$\\Documents\\ShortSqueeze")
os.chdir(r"M:\CNYC19P20003D\khandler$\Documents\ShortSqueeze")
Along with many other variations on the same idea.
I spent some time looking at this stackoverflow article: Python os.chdir is modifying the passed directory name. However, it seems his issue was that part of his path had a specific escape code in it, \201. Since I don't have anything like \n or \t, I figured my issue was different.
How can I change my current working directory to my desired path? Is it possible that I have copied my path wrong? Is this an issue with backslashes?