How to check if the string is empty?

python string comparison-operators
Joan Venge picture Joan Venge · Mar 5, 2012 · Viewed 1.9M times · Source

Does Python have something like an empty string variable where you can do:

if myString == string.empty:

Regardless, what's the most elegant way to check for empty string values? I find hard coding "" every time for checking an empty string not as good.

Answer

Andrew Clark picture Andrew Clark · Mar 5, 2012

Empty strings are "falsy" which means they are considered false in a Boolean context, so you can just do this:

if not myString:

This is the preferred way if you know that your variable is a string. If your variable could also be some other type then you should use myString == "". See the documentation on Truth Value Testing for other values that are false in Boolean contexts.

Related questions

Does Python have a string 'contains' substring method?

I'm looking for a string.contains or string.indexof method in Python. I want to do: if not somestring.contains("blah"): continue

Read More
How to read a file line-by-line into a list?

How do I read every line of a file in Python and store each line as an element in a list? I want to read the file line by line and append each line to the end of the list.

Read More
Converting integer to string in Python

I want to convert an integer to a string in Python. I am typecasting it in vain: d = 15 d.str() When I try to convert it to string, it's showing an error like int doesn't have any attribute called str.

Read More