I will try to be as descriptive but brief as possible...

I have been using GitBash in that past on Win10 successfully. I came back to my Windows machine after not using it for a bit and can't seem to get it to launch python scripts it ran without issue previously. I have an alias created for Python3 called py. For instance...

$ py --version
Python 3.7.1

I can get into the iterator just fine

$ py -i
Python 3.7.1 (v3.7.1:260ec2c36a, Oct 20 2018, 14:57:15) [MSC v.1915 64 bit
(AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>>

I can run my scripts just fine in the iterator. Exiting with ctrl+z throws an error, however. In conjunction with this error, when I try to run the scipts from the command line, it hangs and does not respond. See below...

$ py -i
Python 3.7.1 (v3.7.1:260ec2c36a, Oct 20 2018, 14:57:15) [MSC v.1915 64 bit
(AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> 0 [sig] bash 5224! sigpacket::process: Suppressing signal 18 to
win32 process (pid 5160)
>>> exit()
$ py Lottery.py

It does nothing from this point, until I hit "Enter", at which time it throws a python error and returns me to my command line. I know the python script to be working. I can post the python error if it is helpful, though I think it is a red-herring and not art of the GitBash issue at hand.

Any ideas as to why GitBash is not playing well while trying run python scripts? Thanks in advance!

1 Answer

This is a known issue for windows 10. GitBash's terminal has issues with windows-native apps, such as python, powershell, ipython, etc.

• The terminal eats events, such as your screenshot. This breaks ctr+c / ctrl+z events, preventing exiting
• In addition, those apps break cursor movement, massively corrupted the shell.

The solution is to run winpty, which you should already have from git-bash. Now git-bash is able to run apps without issues.

$ winpty python -i

This fixes both python -i, ipython -i, powershell. I use the following aliases:

alias ipython='winpty ipython'
alias python='winpty python'
alias node='winpty node'
alias powershell='winpty powershell'

An alternate solution is to use a different terminal, such as Windows Terminal

Recently windows released a new Windows Terminal

Now it supports all bash apps, full utf-8 support (the best of any Windows terminals I've ever seen, 256+ ANSI colors, etc.) You no longer need winpty.

Edit your JSON config to use:

"commandline" : "ipython.exe"

If you are using python -i at all, check out ipython.

Combine that with winpty or the terminal to run ipython. It's a huge upgrade to quality of life and usability.

It adds a lot.

• get function signatures and docs using foo? and foo??
• copy->paste works.
• quality of life using any statements longer than one line are hugely improved
• syntax highlighting, even matches braces
• tab completion of names and inspection of attributes such as:

x = "hi world"
x.<tab> # all `str` methods pop-up.
# or
import time
time.monotonic?

Get it using

python -m pip install ipython