How to check whether a str variable is empty or not

Question

How do I make a   if str variable      contains text     condition     or something  because I am pretty sure that what I just wrote is completely wrong   I am sort of trying to check if a random choice from my list is        blank  or contains   text

User · Answer

use  not  in if-else  x   input    if not x     print  Value is not entered   else     print  Value is entered

User · Answer

How do i make an  if str variable      contains text   condition    Perhaps the most direct way is   if str variable                   Note that the if not     solutions test the opposite condition

User · Answer

You could just compare your string to the empty string   if variable            etc    But you can abbreviate that as follows   if variable      etc    Explanation  An if actually works by computing a value for the logical expression you give it  True or False  If you simply use a variable name  or a literal string like  hello   instead of a logical test  the rule is  An empty string counts as False  all other strings count as True  Empty lists and the number zero also count as false  and most other things count as true

User · Answer

Python strings are immutable and hence have more complex handling when talking about its operations  Note that a string with spaces is actually an empty string but has a non-zero size  Let   s see two different methods of checking if string is empty or not  Method  1   Using Len   Using Len   is the most generic method to check for zero-length string  Even though it ignores the fact that a string with just spaces also should be practically considered as an empty string even its non-zero  Method  2   Using not Not operator can also perform the task similar to Len    and checks for 0 length string  but same as the above  it considers the string with just spaces also to be non-empty  which should not practically be true  Good Luck

User · Answer

string    TEST  try    if str string        print  good string  except NameError       print  bad string

User · Answer

Some time we have more spaces in between quotes  then use this approach  a          gt  gt  gt  bool a  True  gt  gt  gt  bool a strip    False  if not a strip        print  String is empty   else      print  String is not empty

User · Answer

element   random choice myList  if element        element contains text else        element is empty

User · Answer

For python 3  you can use bool     gt  gt  gt  bool None  False  gt  gt  gt  bool     False  gt  gt  gt  bool  a   True  gt  gt  gt  bool  ab   True  gt  gt  gt  bool  9   True

User · Answer

if the variable contains text then   len variable     0  of it does not  len variable     0

User · Answer

Just say if s or if not s  As in  s      if not s      print  not   s   So in your specific example  if I understand it correctly      gt  gt  gt  import random  gt  gt  gt  l         foo        bar    gt  gt  gt  def default str l           s   random choice l          if not s              print  default          else              print s       gt  gt  gt  default str l  default  gt  gt  gt  default str l  default  gt  gt  gt  default str l  bar  gt  gt  gt  default str l  default

User · Answer

test str1    quot  quot   test str2    quot    quot       checking if string is empty  print   quot The zero length string without spaces is empty      quot   end    quot  quot    if len test str1     0        print   quot Yes quot    else        print   quot No quot         prints No   print   quot The zero length string with just spaces is empty      quot   end    quot  quot    if len test str2     0        print   quot Yes quot    else        print   quot No quot

User · Answer

Empty strings are False by default    gt  gt  gt  if not             print  empty       empty

User · Answer

The  Pythonic  way to check if a string is empty is   import random variable   random choice l  if variable        got a non-empty string else        got an empty string

[python] How to check whether a str(variable) is empty or not?

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