How to determine whether a substring is in a different string

Question

I have a sub-string   substring    please help me out    I have another string   string    please help me out so that I could solve this    How do I find if substring is a subset of string using Python

User · Answer

foo    blahblahblah  bar    somethingblahblahblahmeep  if foo in bar        do something    By the way - try to not name a variable string  since there s a Python standard library with the same name  You might confuse people if you do that in a large project  so avoiding collisions like that is a good habit to get into

User · Answer

In  7   substring    please help me out   In  8   string    please help me out so that I could solve this   In  9   substring in string Out 9   True

User · Answer

Can also use this method   if substring in string      print string     n Yes located at   format string find substring

User · Answer

People mentioned string find    string index    and string indexOf   in the comments  and I summarize them here  according to the Python Documentation    First of all there is not a string indexOf   method  The link posted by Deviljho shows this is a JavaScript function   Second the string find   and string index   actually return the index of a substring  The only difference is how they handle the substring not found situation  string find   returns -1 while string index   raises an ValueError

User · Answer

with in  substring in string    gt  gt  gt  substring    please help me out   gt  gt  gt  string    please help me out so that I could solve this   gt  gt  gt  substring in string True

User · Answer

Thought I would add this in case you are looking at how to do this for a technical interview where they don t want you to use Python s built-in function in or find  which is horrible  but does happen   string    Samantha  word    man   def find sub string word  string     len word   len word    returns 3    for i in range len string -1       if string i  i   len word     word    return True    else      return False

User · Answer

Instead Of using find    One of the easy way is the Use of   in  as above   if  substring  is present in  str  then if part will execute otherwise else part will execute

User · Answer

If you re looking for more than a True False  you d be best suited to use the re module  like   import re search  please help me out  fullstring  please help me out so that I could solve this  s   re search search fullstring  print s group      s group   will return the string  please help me out

User · Answer

You can also try find   method  It determines if string str occurs in string  or in a substring of string   str1    please help me out so that I could solve this  str2    please help me out   if  str1 find str2  gt  0     print  True   else    print   False

User · Answer

def find substring        s    bobobnnnnbobmmmbosssbob      cnt   0     for i in range len s            if s i i 3      bob               cnt    1     print  bob found      str cnt      return cnt  def main        print find substring     main

[python] How to determine whether a substring is in a different string

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