IndexError at Tkinter.py (under Windows) - fix

[Frank]

In case it helps anyone:
Running under Windows 10 64bit.
User guide doesn't specify the required Python version. After some trial and error I got it working under Python 2.7 (not under 3.x).
I got an IndexError at Tkinter.py when trying to run Demo #1:

  File "C:\Python27\lib\lib-tk\Tkinter.py", line 1820, in __init__
    baseName = os.path.basename(sys.argv[0])
IndexError: list index out of range

I fixed this by editing Tkinter.py, replacing the line

            baseName = os.path.basename(sys.argv[0])

with the following:

            try:
                sys.argv[0]
            except IndexError:
                baseName = 'DSF_fitting.py'
            else:
                baseName = os.path.basename(sys.argv[0])

Then it worked.
Obviously this doesn't look very tidy, as it introduces an ad-hoc exception check and a hard-coded string in a shared library. Is there a better way to fix this? (I don't have a lot of Python experience)

Otherwise, very nice program, thanks!

[John Karanicolas]

Hi Frank,

Thank you for finding this problem, and especially for developing and sharing the solution! I hadn't tested this on a Windows machine, so I didn't know about this. Your solution will make it easier for others to use this program, so thank you for sharing!!

John Karanicolas.

[John Koberstein]

I also encountered this issue running on python 2.7 and Ubuntu 18.04. The root of the problem occurs at line 550 and 551:

flags = sys.argv
script_name = flags.pop(0)  # first item is the filename

I think with flags being a shallow copy of sys.argv the pop operation ends up emptying sys.argv as well, which causes problems later when matplotlib tries to make use of sys.argv. This can be fixed by changing to :

flags = deepcopy(sys.argv)

[Raj Singh]

When I try to run this using Anaconda I get the following error.

C:\WINDOWS\system32>C:\dsf_fitting\DSF_fitting.py
File "C:\dsf_fitting\DSF_fitting.py", line 13
print "\nHere are the supported flags:\n"
^
SyntaxError: Missing parentheses in call to 'print'. Did you mean print("\nHere are the supported flags:\n")?

In addition to installilng anaconda, I have Python, numpy, scipy, matplotlib installed on windows 10. everything is uptodate.
-numpy, scipy, matplotlib were installed using Anaconda Prompt (Admin)
Any help would be great.

[John Karanicolas]

Hi Raj,
I think this is a Python 2 versus Python 3 issue. Could you please check what version of Python you're running? Thanks,

John.

[Raj Singh]

Hi John,
Thank you for responding. Yes I was able to get it to work with python 2.

Thank you,
Raj

[John Karanicolas]

Hi Raj,
Glad to hear it! Inspired by your comment I'm preparing a Python 3 version, and will update the code here very soon. Thanks for bringing this to my attention!

John.

[Raj Singh]

Hi John,
Thanks for doing this. This goes without saying, on behalf of everyone using your script we really appreciate your work and thanks for making this available for everyone to use.

Thank you,
Rajdeep Virdi.

[John Karanicolas]

Hi Raj,
I've updated the code, the new version works with Python3. Thanks again for pointing this out!

John.

[Raj Singh]

Hi John,
Just tested the updated version. Seems to work perfectly with Anaconda 3.

Thank you,
Raj