Convert list to tuple in Python

It should work fine. Don't use tuple, list or other special names as a variable name. It's probably what's causing your problem.

>>> l = [4,5,6]>>> tuple(l)(4, 5, 6)>>> tuple = 'whoops'   # Don't do this>>> tuple(l)TypeError: 'tuple' object is not callable

Expanding on eumiro's comment, normally tuple(l) will convert a list l into a tuple:

In [1]: l = [4,5,6]In [2]: tupleOut[2]: <type 'tuple'>In [3]: tuple(l)Out[3]: (4, 5, 6)

However, if you've redefined tuple to be a tuple rather than the type tuple:

In [4]: tuple = tuple(l)In [5]: tupleOut[5]: (4, 5, 6)

then you get a TypeError since the tuple itself is not callable:

In [6]: tuple(l)TypeError: 'tuple' object is not callable

You can recover the original definition for tuple by quitting and restarting your interpreter, or (thanks to @glglgl):

In [6]: del tupleIn [7]: tupleOut[7]: <type 'tuple'>

You might have done something like this:

>>> tuple = 45, 34  # You used `tuple` as a variable here>>> tuple(45, 34)>>> l = [4, 5, 6]>>> tuple(l)   # Will try to invoke the variable `tuple` rather than tuple type.Traceback (most recent call last):  File "<pyshell#10>", line 1, in <module>    tuple(l)TypeError: 'tuple' object is not callable>>>>>> del tuple  # You can delete the object tuple created earlier to make it work>>> tuple(l)(4, 5, 6)

Here's the problem... Since you have used a tuple variable to hold a tuple (45, 34) earlier... So, now tuple is an object of type tuple now...

It is no more a type and hence, it is no more Callable.

Never use any built-in types as your variable name... You do have any other name to use. Use any arbitrary name for your variable instead...