在TkMessageBox中显示数组的元素

Question

The code i'm using is the following:

if len(areUnusedParams) > 0:
   tkMessageBox.showinfo('Error!','The following parameters are unchanged throughout the C-files and are also not present in parameter.txt:\n')

Now, i want the contents of areUnusedParams (which is an array) to be posted when the MessageBox is displayed and every element should be on their own line. I was contemplating something like:

'\n'.join(areUnusedParams)

But I don't know how to implement it, PyCharm keeps complaining when I try to do it.

Answer 1

when you add the list of areUnusedParams to showinfo as a third argument it will raise a TypeError much like the following:

Traceback (most recent call last):
  File ".../test.py", line 3, in <module>
    tkMessagebox.showinfo("title","message","thing")
TypeError: showinfo() takes from 0 to 2 positional arguments but 3 were given

Since you intend the '\\n'.join(areUnusedParams) to be part of the message you need to add it to the message instead of passing as an additional argument:

tkMessageBox.showinfo('Error!',
                      'The following parameters are unchanged throughout the C-files and are also not present in parameter.txt:\n' \
                         + '\n'.join(areUnusedParams))

I assume that all of areUnusedParams are all strings but just to be thorough, if they are not then it is an invalid thing to pass to str.join in which case you can cast all of them to strings using map :

'\n'.join(map(str,areUnusedParams))