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Python String isidentifier() Method

❮ String Methods


Example

Check if the string is a valid identifier:

txt = "Demo"

x = txt.isidentifier()

print(x)
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Definition and Usage

The isidentifier() method returns True if the string is a valid identifier, otherwise False.

A string is considered a valid identifier if it only contains alphanumeric letters (a-z) and (0-9), or underscores (_). A valid identifier cannot start with a number, or contain any spaces.


Syntax

string.isidentifier()

Parameter Values

No parameters.


More Examples

Example

Check if the strings are valid identifiers:

a = "MyFolder"
b = "Demo002"
c = "2bring"
d = "my demo"

print(a.isidentifier())
print(b.isidentifier())
print(c.isidentifier())
print(d.isidentifier())
Run example »

❮ String Methods