Add string in a certain position in Python

Question

Is there any function in Python that I can use to insert a value in a certain position of a string   Something like this    3655879ACB6  then in position 4 add  -  to become  3655-879ACB6

User · Answer

If you want many inserts  from rope base codeanalyze import ChangeCollector  c   ChangeCollector code  c add change 5  5    lt span style  background-color  339999   gt    c add change 10  10    lt  span gt    rend code   c get changed

User · Answer

As strings are immutable another way to do this would be to turn the string into a list  which can then be indexed and modified without any slicing trickery   However  to get the list back to a string you d have to use  join   using an empty string      gt  gt  gt  hash    355879ACB6   gt  gt  gt  hashlist   list hash   gt  gt  gt  hashlist insert 4   -    gt  gt  gt     join hashlist   3558-79ACB6    I am not sure how this compares as far as performance  but I do feel it s easier on the eyes than the other solutions   -

User · Answer

Simple function to accomplish this   def insert str string  str to insert  index       return string  index    str to insert   string index

User · Answer

This seems very easy    gt  gt  gt  hash    355879ACB6   gt  gt  gt  hash   hash  4     -    hash 4    gt  gt  gt  print hash 3558-79ACB6   However if you like something like a function do as this   def insert dash string  index       return string  index     -    string index    print insert dash  355879ACB6   5

User · Answer

I think the above answers are fine  but I would explain that there are some unexpected-but-good side effects to them     def insert string s  insert s  pos i 0       return string s  pos i    insert s   string s pos i     If the index pos i is very small  too negative   the insert string gets prepended  If too long  the insert string gets appended  If pos i is between -len string s  and  len string s  - 1  the insert string gets inserted into the correct place

User · Answer

Python 3 6  using f-string   mys    1362511338314  f  mys  10    mys 10       gives   1362511338 314

User · Answer

No  Python Strings are immutable       gt  gt  gt  s  355879ACB6   gt  gt  gt  s 4 4     -  Traceback  most recent call last     File   lt stdin gt    line 1  in  lt module gt  TypeError   str  object does not support item assignment   It is  however  possible to create a new string that has the inserted character    gt  gt  gt  s  4     -    s 4    3558-79ACB6

User · Answer

I have made a very useful method to add a string in a certain position in Python   def insertChar mystring  position  chartoinsert        longi   len mystring      mystring      mystring  position    chartoinsert   mystring position        return mystring     for example   a    Jorgesys was here    def insertChar mystring  position  chartoinsert        longi   len mystring      mystring      mystring  position    chartoinsert   mystring position        return mystring      Inserting some characters with a defined position      print insertChar a 0   -        print insertChar a 9            print insertChar a 14             we will have as an output   -Jorgesys was here  Jorgesys  was here  Jorgesys was h ere

[python] Add string in a certain position in Python

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