Python String isalpha() Method

Syntax

The Syntax of the str.isalpha() function is:

str.isalpha()

Here, str is a string.

Parameters

The str.isalpha() function does not take any parameters.

Return Value

The str.isalpha() function returns:

• True - if all the characters in the string are alphabets.
• False - if at least one of the characters in the string is non-alphabet or an empty string,

Example 1: Python Program to check if the string is an alphabet

The isalpha() method returns True only if all the characters in the string are alphabets(Uppercase/Lowercase); if it finds other than alphabets such as space, numbers, special characters in the string, it returns False.

# string with only alphabets
text = "Python"
print(text.isalpha())

# string with alphabets and space
text = "Python is Awesome"
print(text.isalpha())

# string with alphabets and number
text = "Python3"
print(text.isalpha())

Output

True
False
False

Example 2: How to use the isalpha() method in a program?

The below program will iterate all the elements in the list, and using isalpha() method, it determines whether the element/name is an alphabet or not.

# program to check if the first name has only alphabets
fname_lst = ["Chandler", "Rachel", "Ross", "Monica", "Joey5", "Phoebe Buffay"]

for name in fname_lst:
    if (name.isalpha() == False):
        print(f"Not all the characters in the name {name} are alphabets")

Output

Not all the characters in the name Joey5 are alphabets
Not all the characters in the name Phoebe Buffay are alphabets

Reference: Python Official Docs