Exercise 1.11: PermissionError returned on top of ZeroDivisionError on Windows system

When executing the solution for exercise 1.11, I got a cryptic PermissionError on top of the ZeroDivisionError when trying to write (or actually delete) the I_should_be_deleted.csv file.

Interestingly, this only happened on my Windows system (via a jupyter notebook) but not on my ubuntu WSL.

(Also, everything worked fine for the I_should_exist.csv example.)

This might not be very relevant since most people are working with Linux or Mac anyway, but I thought I'd share it regardless :)

import os
from contextlib import contextmanager

@contextmanager
def safe_write(filename):
    with open(filename, 'wt') as fh:
        try:
            yield fh
        except ZeroDivisionError:
            os.remove(filename)
            # re-raising the ZeroDivisionError exception ensures we don't silence the error
            # try omitting the next line and compare the resulting behavior
            raise

with safe_write("I_should_be_deleted.csv") as out:
    value = 500 / 0
    out.write(f"{value}\n")

---------------------------------------------------------------------------
ZeroDivisionError                         Traceback (most recent call last)
<ipython-input-17-92cfcbd004dc> in safe_write(filename)
      8         try:
----> 9             yield fh
     10         except ZeroDivisionError:

<ipython-input-18-c487a4dd208f> in <module>
      1 with safe_write("I_should_be_deleted.csv") as out:
----> 2     value = 500 / 0
      3     out.write(f"{value}\n")

ZeroDivisionError: division by zero

During handling of the above exception, another exception occurred:

PermissionError                           Traceback (most recent call last)
<ipython-input-18-c487a4dd208f> in <module>
      1 with safe_write("I_should_be_deleted.csv") as out:
      2     value = 500 / 0
----> 3     out.write(f"{value}\n")

~\anaconda3\lib\contextlib.py in __exit__(self, type, value, traceback)
    128                 value = type()
    129             try:
--> 130                 self.gen.throw(type, value, traceback)
    131             except StopIteration as exc:
    132                 # Suppress StopIteration *unless* it's the same exception that

<ipython-input-17-92cfcbd004dc> in safe_write(filename)
      9             yield fh
     10         except ZeroDivisionError:
---> 11             os.remove(filename)
     12             # re-raising the ZeroDivisionError exception ensures we don't silence the error
     13             # try omitting the next line and compare the resulting behavior

PermissionError: [WinError 32] The process cannot access the file because it is being used by another process: 'I_should_be_deleted.csv'