Python 3 reference · String Methods

Python String isspace() Method

Return True if every character is whitespace (spaces, tabs, newlines) and the string isn't empty.

Syntax

str.isspace()

True or False.

Whitespace only?Try it yourself

print("   ".isspace(), " \t\n".isspace(), "".isspace(), " a ".isspace())

Output

True True False False

Skip blank lines (a common pattern)Try it yourself

lines = ["first", "   ", "", "second"]
print([l for l in lines if l.strip()])

Output

['first', 'second']

Version	Change
Python 3.0	Added

str.strip() · Return a copy with leading and trailing characters removed: whitespace by default, or any of the characters you pass.
str.isprintable() · Return True if every character is printable, or the string is empty. Newlines and tabs are not printable.
Python Strings · tutorial