How to solve "TypeError: list indices must be integers".

[John Machin]

On Jan 22, 3:15 am, "®" <princi... at gmail.com> wrote:
> This is more details about my problem, which I running my py script
> for my project. Programming in pythoncard that we can develop a GUI
> based application easily.
>
> I was assigned dialog.colorDialog(self) return value to a result
> object, but I suspect that result.color is the attribute of the result
> object that can assign to a string variable.

The concepts "<developer> assigned <expression> to a <type> object"
and "<expression> can be assigned to a <type> variable" just don't
exist in Python.

# Initially "name1" isn't bound to anything
name1 = 42
# "name1" now refers to an int object whose value is 42
name1 = 'abc'
# "name1" now refers to a str object whose value is 'abc'
name2 = name1
# "name2" now refers to the same str object

What is "dialog.colorDialog(self) return value"? What is "a result
 object"? Show us the code!

What is the connection between your last sentence above and the
"TypeError: list indices must be integers" problem? Show us the code!

>
> There is a error prompt from python console "TypeError: list indices
> must be integers".
> Have any suggestion to solve this problem?

Communication would be much easier if you show us the line of code
that causes the error message.

Here are two simple examples of what can trigger that error message:

>>> a_list = [1, 42, 666]
>>> not_an_integer = None

>>> a_list[not_an_integer] = 9876
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: list indices must be integers

>>> a_name = a_list[not_an_integer]
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: list indices must be integers

Look for the pattern a_list[not_an_integer] in the statement that
triggers the exception.


>
> When I print  result.color, it is print out something like (255,0,0).

Yes, that's most likely a tuple of (red, green, blue) values ... I'm
not astonished; are you?

> How to covert result.color into a string?

How? Use elementary Python functionality, after you've decided what
string representation you want. Examples:

>>> color = (255, 128, 0)
>>> "red=%d green=%d blue=%d" % color
'red=255 green=128 blue=0'
>>> '.someclass {background-color: #%02x%02x%02x; }' % color
'.someclass {background-color: #ff8000; }'
>>>

> How to convert a string to
> result.color type?

Reverse the process.

Again, what is the connection between "result.color" and the
"TypeError: list indices must be integers" problem?