Check if space is in a string

Question

in word    True   I m writing a program that checks whether the string is a single word  Why doesn t this work and is there any better way to check if a string has no spaces is a single word

User · Answer

The following would be a very simple solution   print     string   input  Enter your string     noofspacesinstring   0 for counter in string      if counter                noofspacesinstring    1 if noofspacesinstring    0     message    Your string is a single word   else     message    Your string is not a single word  print        print message     print

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You can see whether the output of the following code is 0 or not   import re x    beer     len re findall   s   x

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Use this   word   raw input  Please enter a single word      while True      if     in word          word   raw input  Please enter a single word          else          print  Thanks          break

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Write if     in word  instead of if     in word    True    Explanation    In Python  for example a  lt  b  lt  c is equivalent to  a  lt  b  and  b  lt  c   The same holds for any chain of comparison operators  which include in  Therefore     in w    True is equivalent to      in w  and  w    True  which is not what you want

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def word in s      return  quot   quot  not in s

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There are a lot of ways to do that    t   s split      if len t   gt  1    print  several tokens    To be sure it matches every kind of space  you can use re module     import re if re search r  s   your string     print  several words

User · Answer

word       while True      if     in word          word   raw input  Please enter a single word         else          print  Thanks          break   This is more idiomatic python - comparison against True or False is not necessary - just use the value returned by the expression     in word    Also  you don t need to use pastebin for such a small snippet of code - just copy the code into your post and use the little 1s and 0s button to make your code look like code

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You can try this  and if it will find any space it will return the position where the first space is   if mystring find         -1      print True else      print False

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You can use the  re  module in Python 3  If you indeed do  use this   re search   s   word    This should return either  true  if there s a match  or  false  if there isn t any

User · Answer

You can say word strip      to remove any leading trailing spaces from the string - you should do that before your if statement  That way if someone enters input such as   test   your program will still work   That said  if     in word  will determine if a string contains any spaces  If that does not working  can you please provide more information

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takes precedence over in  so you re actually testing word    True    gt  gt  gt  w    ab c   gt  gt  gt      in w    True 1  False  gt  gt  gt       in w     True 2  True   But you don t need    True at all  if requires  something that evalutes to True or False  and     in word will evalute to true or false  So  if     in word      is just fine    gt  gt  gt      in w 3  True

[python] Check if space is in a string

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