Programa de Python para probar si la string solo tiene números y alfabetos

Dada una string, nuestra tarea es escribir un programa en Python para comprobar si la string contiene tanto números como letras, pero no signos de puntuación.

Ejemplos:

Input : test_str = 'Geeks4Geeks'
Output : True
Explanation : Contains both number and alphabets.

Input : test_str = 'GeeksforGeeks'
Output : False
Explanation : Doesn't contain number.

Método #1: Usando isalpha() + isdigit() + any() + all() + isalnum()

En esto, verificamos todos los dígitos que contienen una combinación de letras y números usando all(), isalpha() e isdigit(). Any() e isalnum() se utilizan para filtrar la posibilidad de puntuaciones.

# Python3 code to demonstrate working of
# Test if string contains both Numbers and Alphabets only
# Using isalpha() + isdigit() + any() + all() + isalnum()
 
# initializing string
test_str = 'Geeks4Geeks'
 
# printing original string
print("The original string is : " + str(test_str))
 
# conditional combination for getting result.
res = not ((all(idx.isdigit() for idx in test_str) or (all(idx.isalpha()
            for idx in test_str)) or (any(not idx.isalnum() for idx in test_str))))
 
# printing result
print("Does string contain both numbers and alphabets only? : " + str(res))

The original string is : Geeks4Geeks
Does string contain both numbers and alphabets only? : True

Método #2: Usar expresiones regulares

El uso de expresiones regulares es una de las formas en que se puede resolver este problema. 

# Python3 code to demonstrate working of
# Test if string contains both Numbers and Alphabets only
# Using regex
import re
 
# initializing string
test_str = 'Geeks4Geeks'
 
# printing original string
print("The original string is : " + str(test_str))
 
# conditional combination for getting result.
res = bool(re.match("^(?=.*[a-zA-Z])(?=.*[\d])[a-zA-Z\d]+$", "A530"))
         
# printing result
print("Does string contain both numbers and alphabets only? : " + str(res))

The original string is : Geeks4Geeks
Does string contain both numbers and alphabets only? : True

Método #3: Usando el operador in

# Python3 code to demonstrate working of
# Test if string contains both Numbers and Alphabets only
 
# initializing string
test_str = 'Geeks4Geeks'
lowercasealphabets="abcdefghijklmnopqrstuvwxyz"
uppercasealphabets="ABCDEFGHIJKLMNOPQRSTUVWXYZ"
digits="0123456789"
 
# printing original string
print("The original string is : " + str(test_str))
 
res=False
al=0
dig=0
for i in test_str:
    if (i in lowercasealphabets) or (i in uppercasealphabets):
        al+=1
    elif (i in digits) :
        dig+=1
if(al+dig==len(test_str)):
    res=True
     
# printing result
print("Does string contain both numbers and alphabets only? : " + str(res))
 
 
 
#contributed by Bhavya Koganti

The original string is : Geeks4Geeks
Does string contain both numbers and alphabets only? : True