How to properly print a list

Question

So I have a list     x   3   b    And I want the output to be    x  3  b   How can I do this in python   If I do str   x   3   b     I get one with quotes  but I don t want quotes

User · Answer

I was inspired by  AniMenon to write a pythonic more general solution    mylist     x   3   b   print        format      join map      format  mylist       It only uses the format method  No trace of str  and it allows for the fine tuning of the elements format  For example  if you have float numbers as elements of the list  you can adjust their format  by adding a conversion specifier  in this case   2f  mylist    1 8493849  -6 329323  4000 21222111  print        format      join map     2f   format  mylist       The output is quite decent    1 85  -6 33  4000 21

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You can delete all unwanted characters from a string using its translate   method with None for the table argument followed by a string containing the character s  you want removed for its deletechars argument   lst     x   3   b    print str lst  translate None           x  3  b    If you re using a version of Python before 2 6  you ll need to use the string module s translate   function instead because the ability to pass None as the table argument wasn t added until Python 2 6  Using it looks like this   import string  print string translate str lst   None         Using the string translate   function will also work in 2 6   so using it might be preferable

User · Answer

This is simple code  so if you are new you should understand it easily enough       mylist     x   3   b       for items in mylist          print items    It prints all of them without quotes  like you wanted

User · Answer

Here s an interactive session showing some of the steps in  TokenMacGuy s one-liner  First he uses the map function to convert each item in the list to a string  actually  he s making a new list  not converting the items in the old list   Then he s using the string method join to combine those strings with      between them  The rest is just string formatting  which is pretty straightforward   Edit  this instance is straightforward  string formatting in general can be somewhat complex    Note that using join is a simple and efficient way to build up a string from several substrings  much more efficient than doing it by successively adding strings to strings  which involves a lot of copying behind the scenes    gt  gt  gt  mylist     x   3   b    gt  gt  gt  m   map str  mylist   gt  gt  gt  m   x    3    b    gt  gt  gt  j        join m   gt  gt  gt  j  x  3  b

User · Answer

Instead of using map  I d recommend using a generator expression with the capability of join to accept an iterator   def get nice string list or iterator       return            join  str x  for x in list or iterator          Here  join is a member function of the string class str  It takes one argument  a list  or iterator  of strings  then returns a new string with all of the elements concatenated by  in this case

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In Python 2   mylist     x   3   b   print    s          join map str  mylist     In Python 3  where print is a builtin function and not a syntax feature anymore    mylist     x   3   b   print    s          join map str  mylist      Both return    x  3  b    This is using the map   function to call str for each element of mylist  creating a new list of strings that is then joined into one string with str join    Then  the   string formatting operator substitutes the string in instead of  s in    s

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If you are using Python3   print     end     print  L  sep       end     print

User · Answer

Using  format for string formatting   mylist     x   3   b   print    0    format      join map str  mylist       Output    x  3  b      Explanation    map is used to map each element of the list to string type  The elements are joined together into a string with   as separator  We use   and   in the print statement to show the list braces    Reference    format for string formatting PEP-3101

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Using only print    gt  gt  gt  l     x   3   b    gt  gt  gt  print  l  sep   n   x 3 b  gt  gt  gt  print  l  sep       x  3  b

[python] How to "properly" print a list?

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