How to append a tuple to a list?

Question

How can I append a tuple to a list? I am trying following:

>>> a = []
>>> a.append(tuple((str("{0}".format(5000)))))
>>> a
[('5', '0', '0', '0')]

Expected output is:

[('5000')]

Can someone help me fixing this issue?

`a.append(tuple((str("{0}".format(5000)),)))` - notice the comma — rdas, Mar 30 '20 at 18:56
Is there a reason why you need to append a tuple of only a single element? Note that ``[('5000')]`` is the same as ``['5000']``. — MisterMiyagi, Mar 30 '20 at 18:59

score 5 · Accepted Answer · answered Mar 30 '20 at 18:57

To add a one-value tuple use the notation (value, ), also no need use the str, "".format() is a string

a.append(("{0}".format(5000),))

Regarding the format you use, just do

a.append((str(5000),))

If we decompose it

t = ("{0}".format(5000),)
a.append(t)

score 2 · Answer 2 · answered Mar 30 '20 at 18:57

This is because python does not allow you to create a single element tuple directly. You must use one comma for this.

For example:

my_tuple = (100) #It's integer
my_tuple = (100,) #It's tuple

Try this for your code:

a.append(tuple((str("{0}".format(5000)),)))

2 Answers2