Python 3 turn range to a list

Question

I m trying to make a list with numbers 1-1000 in it  Obviously this would be annoying to write read  so I m attempting to make a list with a range in it  In Python 2 it seems that   some list   range 1 1000    would have worked  but in Python 3 the range is similar to the xrange of Python 2   Can anyone provide some insight into this

User · Answer

You really shouldn t need to use the numbers 1-1000 in a list  But if for some reason you really do need these numbers  then you could do    i for i in range 1  1001     List Comprehension in a nutshell   The above list comprehension translates to   nums      for i in range 1  1001       nums append i    This is just the list comprehension syntax  though from 2 x  I know that this will work in python 3  but am not sure if there is an upgraded syntax as well  Range starts inclusive of the first parameter  but ends Up To  Not Including the second Parameter  when supplied 2 parameters  if the first parameter is left off  it ll start at  0      range start  end 1   start  start 1      end

User · Answer

in Python 3 x  the range   function got its own type  so in this case you must use iterator  list range 1000

User · Answer

Actually  if you want 1-1000  inclusive   use the range      function with parameters 1 and 1001  range 1  1001   because the range start  end  function goes from start to  end-1   inclusive

User · Answer

Use Range in Python 3   Here is a example function that return in between numbers from two numbers  def get between numbers a  b               This function will return in between numbers from two numbers       param a       param b       return              x          if b  lt  a          x extend range b  a           x append a      else          x extend range a  b           x append b       return x      Result   print get between numbers 5  9   print get between numbers 9  5     5  6  7  8  9     5  6  7  8  9

User · Answer

In fact  this is a retro-gradation of Python3 as compared to Python2  Certainly  Python2 which uses range   and xrange   is more convenient than Python3 which uses list range    and range   respectively  The reason is because the original designer of Python3 is not very experienced  they only considered the use of the range function by many beginners to iterate over a large number of elements where it is both memory and CPU inefficient  but they neglected the use of the range function to produce a number list  Now  it is too late for them to change back already   If I was to be the designer of Python3  I will    use irange to return a sequence iterator use lrange to return a sequence list use range to return either a sequence iterator  if the number of elements is large  e g   range 9999999  or a sequence list  if the number of elements is small  e g   range 10     That should be optimal

User · Answer

Python 3  my list     range 1001

User · Answer

The reason why Python3 lacks a function for directly getting a ranged list is because the original Python3 designer was quite novice in Python2  He only considered the use of range   function in a for loop  thus  the list should never need to be expanded  In fact  very often we do need to use the range   function to produce a list and pass into a function   Therefore  in this case  Python3 is less convenient as compared to Python2 because    In Python2  we have xrange   and range     In Python3  we have range   and list range      Nonetheless  you can still use list expansion in this way     range N

User · Answer

You can just construct a list from the range object   my list   list range 1  1001     This is how you do it with generators in python2 x as well   Typically speaking  you probably don t need a list though since you can come by the value of my list i  more efficiently  i   1   and if you just need to iterate over it  you can just fall back on range   Also note that on python2 x  xrange is still indexable1   This means that range on python3 x also has the same property2  1print xrange 30  12  works for python2 x  2The analogous statement to 1 in python3 x is print range 30  12   and that works also

User · Answer

In Pythons  lt   3 4 you can  as others suggested  use list range 10   in order to make a list out of a range  In general  any iterable    Another alternative  introduced in Python 3 5 with its unpacking generalizations  is by using   in a list literal       gt  gt  gt  r   range 10   gt  gt  gt  l     r   gt  gt  gt  print l   0  1  2  3  4  5  6  7  8  9    Though this is equivalent to list r   it s literal syntax and the fact that no function call is involved does let it execute faster  It s also less characters  if you need to code golf  -

[python] Python 3 turn range to a list

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