[Tutor] How to programmatically EDIT a python file using an editorof my choice ?

[Dominique]

Alan Gauld <alan.gauld <at> btinternet.com> writes:




> 
> How would you do this non programatically and not from the GUI?
> In other words can you do it from an OS command line?

Hello Alan,

Thank you for your response.

I want to do it from a GUI (with wxPython).
I work with Windows XP SP3, python 2.5 and wxPython 2.8.9.2.

subprocess.Popen(args = ["notepad", filename]) works fine.
Same for subprocess.Popen(["C:\Program Files\Editra\Editra.exe", filename]).
It opens the file with notepad or Editra without problems.

subprocess.Popen("notepad") or subprocess.Popen("C:\Program
Files\Editra\Editra.exe") work also fine.

Conversely, subprocess.Popen("notepad++") doesn't work.

If I do subprocess.Popen(args = ["notepad++", filename]), I get an exception.
The exception is as follows:
Traceback (most recent call last):
  File "<pyshell#22>", line 1, in <module>
    s.Popen(args = ["notepad++.exe", "c:\\Redirect.txt"])
  File "C:\Python25\lib\subprocess.py", line 594, in __init__
    errread, errwrite)
  File "C:\Python25\lib\subprocess.py", line 816, in _execute_child
    startupinfo)
WindowsError: [Error 2] Le fichier spécifié est introuvable (the specified file
cannot be found)

I tried several other ways without any success:
subprocess.Popen(args = ["notepad++.exe", filename])
subprocess.Popen(args = ["C:\Program Files\Notepad++\notepad++.exe", filename])

I wonder if it is due to the location of the softwares.
Notepad.exe is located in C:\WINDOWS while notepad++ is located in C:\Program
Files\Notepad++

>If not is thre an API to the editor, for example Windows editors 
>may have a COM interface that you could access.

Do you mean that it is not always possible to open another software from python,
notably if the software doesn't have a COM interface ?

> 
> ed = os.getenv('EDITOR')
> vi = os.getenv('VISUAL')

os.getenv is always None, which may be correct since I am on Windows ?


Thanks a lot  for your help.
Dominique