Converting a function parameter into Global variable

Question

When I try convert a parameter into global variable it gives the following error. Is there any way where I can convert the imported paramter to global without using two different names? Edit : The solve(grid) will be called by another module. I want to make sure the parameter becomes global after the function being called.

>>> grid = []
>>> def solve(grid)
...     global grid
...

Output:

File "<stdin>", line 1
SyntaxError: name 'grid' is local and global

No, that doesn't make sense at all. And why do you want to do this? — Daniel Roseman, Jan 06 '17 at 10:42
If global `grid` variable and the parameter `grid` always are the same. Then you could just write `def solve()`. — J. P. Petersen, Jan 06 '17 at 10:43
The global `grid` will be updated by the `grid` passed in the function. As well the function `solve()` will be called by another module. — Abuhujair Khan, Jan 06 '17 at 11:03

score 0 · Answer 1 · edited May 23 '17 at 12:13

If you declare the variable as global, It's only "global" inside the function anyway. The Global here doesn't have any effect on other functions. If you want the variable to be callable in other functions you call from this one without passing the value or if yo uhave paralel threads running, don't use global variables.

I don't exactly know what you plan to do, but I would suggest using a class and handling all the using of the variable over getter and setter methods instead. It's not pythonic but should work... You can find more about it here: What's the pythonic way to use getters and setters?

Hope I could point you in the right direction. There are a lot of other better ways to handle scopes of variables than using global. Start with that.

Converting a function parameter into Global variable

1 Answers1