How can I split and parse a string in Python

Question

I am trying to split this string in python  2 7 0 bf4fda703454  I want to split that string on the underscore   so that I can use the value on the left side

User · Answer

If it s always going to be an even LHS RHS split  you can also use the partition method that s built into strings  It returns a 3-tuple as  LHS  separator  RHS  if the separator is found  and  original string          if the separator wasn t present    gt  gt  gt   2 7 0 bf4fda703454  partition        2 7 0         bf4fda703454     gt  gt  gt   shazam  partition        shazam

User · Answer

2 7 0 bf4fda703454  split      gives a list of strings   In  1    2 7 0 bf4fda703454  split      Out 1     2 7 0    bf4fda703454     This splits the string at every underscore  If you want it to stop after the first split  use  2 7 0 bf4fda703454  split      1    If you know for a fact that the string contains an underscore  you can even unpack the LHS and RHS into separate variables   In  8   lhs  rhs    2 7 0 bf4fda703454  split      1   In  9   lhs Out 9    2 7 0   In  10   rhs Out 10    bf4fda703454    An alternative is to use partition    The usage is similar to the last example  except that it returns three components instead of two  The principal advantage is that this method doesn t fail if the string doesn t contain the separator

User · Answer

Python string parsing walkthrough  Split a string on space  get a list  show its type  print it out   el apollo   foo  python  gt  gt  gt  mystring    What does the fox say     gt  gt  gt  mylist   mystring split        gt  gt  gt  print type mylist   lt type  list  gt    gt  gt  gt  print mylist   What    does    the    fox    say      If you have two delimiters next to each other  empty string is assumed   el apollo   foo  python  gt  gt  gt  mystring    its  so   fluffy   im gonna    DIE       gt  gt  gt  print mystring split        its        so            fluffy            im    gonna                DIE        Split a string on underscore and grab the 5th item in the list   el apollo   foo  python  gt  gt  gt  mystring    Time to fire up Kowalski s Nuclear reactor     gt  gt  gt  mystring split      4   Kowalski s    Collapse multiple spaces into one  el apollo   foo  python  gt  gt  gt  mystring    collapse    these       spaces    gt  gt  gt  mycollapsedstring       join mystring split      gt  gt  gt  print mycollapsedstring split        collapse    these    spaces     When you pass no parameter to Python s split method  the documentation states   runs of consecutive whitespace are regarded as a single separator  and the result will contain no empty strings at the start or end if the string has leading or trailing whitespace    Hold onto your hats boys  parse on a regular expression   el apollo   foo  python  gt  gt  gt  mystring    zzzzzzabczzzzzzdefzzzzzzzzzghizzzzzzzzzzzz   gt  gt  gt  import re  gt  gt  gt  mylist   re split   a-m     mystring   gt  gt  gt  print mylist   zzzzzz    zzzzzz    zzzzzzzzz    zzzzzzzzzzzz     The regular expression   a-m    means the lowercase letters a through m that occur one or more times are matched as a delimiter  re is a library to be imported   Or if you want to chomp the items one at a time   el apollo   foo  python  gt  gt  gt  mystring    theres coffee in that nebula    gt  gt  gt  mytuple   mystring partition        gt  gt  gt  print type mytuple   lt type  tuple  gt    gt  gt  gt  print mytuple   theres         coffee in that nebula     gt  gt  gt  print mytuple 0  theres   gt  gt  gt  print mytuple 2  coffee in that nebula

[python] How can I split and parse a string in Python?

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