How to remove all characters after a specific character in python

Question

I have a string  How do I remove all text after a certain character   In this case       The text after will     change so I that s why I want to remove all characters after a certain one

User · Answer

From a file   import re sep          with open  requirements txt   as file in      lines          for line in file in          res   line split sep  1  0          print res

User · Answer

Assuming your separator is        but it can be any string   text    some string    this part will be removed   head  sep  tail   text partition          gt  gt  gt  print head some string   If the separator is not found  head will contain all of the original string   The partition function was added in Python 2 5      partition            S partition sep  -   head  sep  tail   Searches for the separator sep in S  and returns the part before it  the separator itself  and the part after it   If the separator is not found  returns S and two empty strings

User · Answer

If you want to remove everything after the last occurrence of separator in a string I find this works well    lt separator gt  join string to split split  lt separator gt    -1    For example  if  string to split is a path like root location child too far exe and you only want the folder path  you can split by     join string to split split       -1   and you ll get  root location child

User · Answer

The method find will return the character position in a string  Then  if you want remove every thing from the character  do this   mystring    123 567  mystring  0   mystring index         gt  gt   123    If you want to keep the character  add 1 to the character position

User · Answer

another easy way using re will be   import re  clr  text    some string    this part will be removed    text  re search r   A             url re DOTALL re IGNORECASE  group 1      text   some string

User · Answer

Split on your separator at most once  and take the first piece  sep         stripped   text split sep  1  0   You didn t say what should happen if the separator isn t present   Both this and Alex s solution will return the entire string in that case

User · Answer

import re test    This is a test   we should not be able to see this  res   re sub r              test  print res    Output   This is a test

User · Answer

Without a RE  which I assume is what you want    def remafterellipsis text     where ellipsis   text find          if where ellipsis    -1      return text   return text  where ellipsis   3    or  with a RE   import re  def remwithre text  there re compile re escape                  return there sub     text

[python] How to remove all characters after a specific character in python?

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