Dada una lista de tuplas, la tarea es imprimir otra lista que contenga la tupla del mismo primer elemento. A continuación se presentan algunas formas de lograr las tareas anteriores.
Ejemplo:
Input : [('x', 'y'), ('x', 'z'), ('w', 't')]
Output: [('w', 't'), ('x', 'y', 'z')]
Método #1: Usarextend
# Python code to find common
# first element in list of tuple
# Function to solve the task
def find(Input):
out = {}
for elem in Input:
try:
out[elem[0]].extend(elem[1:])
except KeyError:
out[elem[0]] = list(elem)
return [tuple(values) for values in out.values()]
# List initialization
Input = [('x', 'y'), ('x', 'z'), ('w', 't')]
# Calling function
Output = (find(Input))
# Printing
print("Initial list of tuple is :", Input)
print("List showing common first element", Output)
Producción:
Initial list of tuple is : [('x', 'y'), ('x', 'z'), ('w', 't')]
List showing common first element [('w', 't'), ('x', 'y', 'z')]
Método #2: Usardefaultdict
# Python code to find common first
# element in list of tuple
# Importing
from collections import defaultdict
# Function to solve the task
def find(pairs):
mapp = defaultdict(list)
for x, y in pairs:
mapp[x].append(y)
return [(x, *y) for x, y in mapp.items()]
# Input list initialization
Input = [('p', 'q'), ('p', 'r'),
('p', 's'), ('m', 't')]
# calling function
Output = find(Input)
# Printing
print("Initial list of tuple is :", Input)
print("List showing common first element", Output)
Producción:
Initial list of tuple is : [('p', 'q'), ('p', 'r'), ('p', 's'), ('m', 't')]
List showing common first element [('m', 't'), ('p', 'q', 'r', 's')]
Publicación traducida automáticamente
Artículo escrito por everythingispossible y traducido por Barcelona Geeks. The original can be accessed here. Licence: CCBY-SA