snippetpythonTip
How can I check if a string is empty in Python?
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checkhowcanemptypythonstring
Problem
When working with Python strings, a pretty common question is how does one check if a string is empty. There's a straightforward answer to this that takes advantage of the truth value of strings.
In Python, any object can be tested for truth value, including strings. In this context, strings are considered truthy if they are non-empty, meaning they contain at least one character. Thus, simply using the
While this method works in most cases, you may also need to check if the actual value is a string. In this case, you can compare your string to the empty string using the
In Python, any object can be tested for truth value, including strings. In this context, strings are considered truthy if they are non-empty, meaning they contain at least one character. Thus, simply using the
not operator, you can check if a string is empty.While this method works in most cases, you may also need to check if the actual value is a string. In this case, you can compare your string to the empty string using the
== operator.Solution
empty_string = ''
non_empty_string = 'Hello'
not empty_string # True
not non_empty_string # FalseWhile this method works in most cases, you may also need to check if the actual value is a string. In this case, you can compare your string to the empty string using the
== operator.Code Snippets
empty_string = ''
non_empty_string = 'Hello'
not empty_string # True
not non_empty_string # Falseempty_string = ''
non_empty_string = 'Hello'
non_string = 0
empty_string == '' # True
non_empty_string == '' # False
non_string == '' # FalseContext
From 30-seconds-of-code: string-is-empty
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