How to get char from string by index

Question

Lets say I have a string that consists of x unknown chars  How could I get char nr  13 or char nr  x-14

User · Answer

Python org has an excellent section on strings here  Scroll down to where it says  slice notation

User · Answer

This should further clarify the points   a   int raw input  Enter the index    str1    Example  leng   len str1  if  a  lt   len-1   and  a  gt   -len        print str1 a  else      print  Index overflow     Input 3 Output m  Input -3 Output p

User · Answer

In  1   x    anmxcjkwnekmjkldm           78935014712jksdfs  In  2   len x  Out 2   45   Now  For positive index ranges for x is from 0 to 44  i e  length - 1   In  3   x 0  Out 3    a  In  4   x 45  --------------------------------------------------------------------------- IndexError                                Traceback  most recent call last    home  lt ipython console gt  in  lt module gt     IndexError  string index out of range  In  5   x 44  Out 5    s    For Negative index  index ranges from -1 to -45   In  6   x -1  Out 6    s  In  7   x -45  Out 7    a   For negative index  negative  length -1  i e  the last valid value of positive index will give second list element as the list is read in reverse order   In  8   x -44  Out 8    n    Other  index s examples   In  9   x 1  Out 9    n  In  10   x -9  Out 10    7

User · Answer

I think this is more clear than describing it in words  s    python  print len s   6 print s 5    n  print s len s  - 1    n  print s -1    n

User · Answer

First make sure the required number is a valid index for the string from beginning or end   then you can simply use array subscript notation  use len s  to get string length     gt  gt  gt  s    python   gt  gt  gt  s 3   h   gt  gt  gt  s 6  Traceback  most recent call last     File   lt stdin gt    line 1  in  lt module gt  IndexError  string index out of range  gt  gt  gt  s 0   p   gt  gt  gt  s -1   n   gt  gt  gt  s -6   p   gt  gt  gt  s -7  Traceback  most recent call last     File   lt stdin gt    line 1  in  lt module gt  IndexError  string index out of range  gt  gt  gt

User · Answer

Another recommended exersice for understanding lists and indexes   L     a    b    c   for index  item in enumerate L       print index     n    item  0 a 1 b 2 c

User · Answer

Previous answers cover about ASCII character at a certain index   It is a little bit troublesome to get a Unicode character at a certain index in Python 2   E g   with s              which is  lt type  str  gt       getitem    e g   s i    does not lead you to where you desire  It will spit out semething like     Many Unicode characters are more than 1 byte but   getitem   in Python 2 is incremented by 1 byte    In this Python 2 case  you can solve the problem by decoding   s              s   s decode  utf-8   for i in range len s        print s i

[python] How to get char from string by index?

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