String formatting in Python 3

Question

I do this in Python 2      d goals    d      self goals  self penalties    What is the Python 3 version of this   I tried searching for examples online but I kept getting Python 2 versions

User · Answer

That line works as-is in Python 3    gt  gt  gt  sys version  3 2  r32 88445  Oct 20 2012  14 09 29   n GCC 4 5 2    gt  gt  gt     d goals    d      self goals  self penalties    1 goals   2

User · Answer

Python 3 6 now supports shorthand literal string interpolation with PEP 498  For your use case  the new syntax is simply   f   self goals  goals    self penalties      This is similar to the previous  format standard  but lets one easily do things like    gt  gt  gt  width   10  gt  gt  gt  precision   4  gt  gt  gt  value   decimal Decimal  12 34567    gt  gt  gt  f result   value  width   precision     result       12 35

User · Answer

I like this approach  my hash      my hash  goals     3  to show number my hash  penalties      5   to show string print  I scored   goals d goals and took   penalties s penalties    my hash    Note the appended d and s to the brackets respectively   output will be   I scored 3 goals and took 5 penalties

User · Answer

Here are the docs about the  new  format syntax  An example would be       d  goals     d    format self goals  self penalties    If both goals and penalties are integers  i e  their default format is ok   it could be shortened to        goals        format self goals  self penalties    And since the parameters are fields of self  there s also a way of doing it using a single argument twice  as  Burhan Khalid noted in the comments       0 goals  goals    0 penalties    format self    Explaining       means just the next positional argument  with default format   0  means the argument with index 0  with default format    d  is the next positional argument  with decimal integer format   0 d  is the argument with index 0  with decimal integer format    There are many others things you can do when selecting an argument  using named arguments instead of positional ones  accessing fields  etc  and many format options as well  padding the number  using thousands separators  showing sign or not  etc   Some other examples      goals  goals    penalties    format goals 2  penalties 4     goals  goals    penalties    format   self   dict      first goal   0 goal list 0    format self   second goal    goal list 1    format self    conversion rate     2f   format self goals   self shots     0 20   conversion rate     2    format self goals   self shots     20 45    conversion rate     0    format self goals   self shots     20     self    s   format self     Player  Bob   self    r   format self      lt   main   Player instance at 0x00BF7260 gt     games     gt 3   format player1 games      games  123   games     gt 3   format player2 games      games    4   games    0 gt 3   format player2 games     games  004      Note  As others pointed out  the new format does not supersede the former  both are available both in Python 3 and the newer versions of Python 2 as well  Some may say it s a matter of preference  but IMHO the newer is much more expressive than the older  and should be used whenever writing new code  unless it s targeting older environments  of course

[python] String formatting in Python 3

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