Python set to list

Question

How can I convert a set to a list in Python  Using   a   set   Blah    Hello    a   list a    doesn t work  It gives me   TypeError   set  object is not callable

User · Answer

before you write set XXXXX  you have used  set  as a variable e g    set   90  you have used  set  as an object         a   set   Blah    Hello    a   list a

User · Answer

Your code does work  tested with cpython 2 4  2 5  2 6  2 7  3 1 and 3 2     gt  gt  gt  a   set   Blah    Hello     gt  gt  gt  a   list a    You probably wrote a   list a    here or list   set   above  gt  gt  gt  a   Blah    Hello     Check that you didn t overwrite list by accident    gt  gt  gt  assert list      builtins   list

User · Answer

Your code works with Python 3 2 1 on Win7 x64  a   set   Blah    Hello    a   list a  type a   lt class  list  gt

User · Answer

s   set  1 2 3   print   x for x in iter s

User · Answer

Try using combination of map and lambda functions   aList   map  lambda x  x  set   1  2  6  9  0       It is very convenient approach if you have a set of numbers in string and you want to convert it to list of integers   aList   map  lambda x  int x   set    1    2    3    7    12

User · Answer

You ve shadowed the builtin set by accidentally using it as a variable name  here is a simple way to replicate your error   gt  gt  gt  set set    gt  gt  gt  set set   Traceback  most recent call last     File   lt stdin gt    line 1  in  lt module gt  TypeError   set  object is not callable   The first line rebinds set to an instance of set  The second line is trying to call the instance which of course fails   Here is a less confusing version using different names for each variable  Using a fresh interpreter   gt  gt  gt  a set    gt  gt  gt  b a   Traceback  most recent call last     File   lt stdin gt    line 1  in  lt module gt  TypeError   set  object is not callable   Hopefully it is obvious that calling a is an error

User · Answer

This will work    gt  gt  gt  t    1 1 2 2 3 3 4 5   gt  gt  gt  print list set t    1 2 3 4 5    However  if you have used  list  or  set  as a variable name you will get the   TypeError   set  object is not callable   eg    gt  gt  gt  set    1 1 2 2 3 3 4 5   gt  gt  gt  print list set set   Traceback  most recent call last   File   lt stdin gt    line 1  in  lt module gt  TypeError   list  object is not callable   Same error will occur if you have used  list  as a variable name

[python] Python set to list

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