Python Replace with

Question

So I can t seem to figure this out    I have a string say   a  nb  and I want this to become  a nb   I ve tried all the following and none seem to work    gt  gt  gt  a  a  nb   gt  gt  gt  a replace             File   lt stdin gt    line 1     a replace                                   SyntaxError  EOL while scanning string literal  gt  gt  gt  a replace      r       File   lt stdin gt    line 1     a replace      r                              SyntaxError  EOL while scanning string literal  gt  gt  gt  a replace      r       a    nb   gt  gt  gt  a replace             a  nb    I really don t understand why the last one works  because this works fine    gt  gt  gt  a replace            a nb    Is there something I m missing here   EDIT I understand that   is an escape character  What I m trying to do here is turn all   n   t etc  into  n  t etc  and replace doesn t seem to be working the way I imagined it would    gt  gt  gt  a    a  nb   gt  gt  gt  b    a nb   gt  gt  gt  print a a nb  gt  gt  gt  print b a b  gt  gt  gt  a replace             a  nb   gt  gt  gt  a replace               a  nb    I want string a to look like string b  But replace isn t replacing slashes like I thought it would

User · Answer

You are missing  that   is the escape character   Look here  http   docs python org reference lexical analysis html at 2 4 1  Escape Sequence   Most importantly  n is a newline character  And    is an escaped escape character  D   gt  gt  gt  a    a    nb   gt  gt  gt  a  a    nb   gt  gt  gt  print a a  nb  gt  gt  gt  a replace                a  nb   gt  gt  gt  print a replace               a nb

User · Answer

Your original string  a    a  nb  does not actually have two     characters  the first one is an escape for the latter  If you do  print a  you ll see that you actually have only one     character    gt  gt  gt  a    a  nb   gt  gt  gt  print a a nb   If  however  what you mean is to interpret the   n  as a newline character  without escaping the slash  then    gt  gt  gt  b   a replace    n     n    gt  gt  gt  b  a nb   gt  gt  gt  print b a b

User · Answer

In Python string literals  backslash is an escape character  This is also true when the interactive prompt shows you the value of a string  It will give you the literal code representation of the string  Use the print statement to see what the string actually looks like   This example shows the difference    gt  gt  gt             gt  gt  gt  print

User · Answer

path    quot C   Users  Programming  Downloads quot    Replace    with a   along with any random key multiple times path replace         pppyyyttthhhooonnn     Now replace pppyyyttthhhooonnn with a blank string path replace  quot pppyyyttthhhooonnn quot    quot  quot    print path    Output    C  Users Programming Downloads

User · Answer

It s because  even in  raw  strings   strings with an r before the starting quote s    an unescaped escape character cannot be the last character in the string  This should work instead         0

User · Answer

There s no need to use replace for this    What you have is a encoded string  using the string escape encoding  and you want to decode it    gt  gt  gt  s   r Escaped nNewline   gt  gt  gt  print s Escaped nNewline  gt  gt  gt  s decode  string escape    Escaped nNewline   gt  gt  gt  print s decode  string escape   Escaped Newline  gt  gt  gt   a  nb  decode  string escape    a nb    In Python 3    gt  gt  gt  import codecs  gt  gt  gt  codecs decode    n  x21    unicode escape     n

User · Answer

r a  nb  replace                 or   a nb  replace   n      n

[python] Python Replace \\ with \

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