71 lines
1.5 KiB
Python
71 lines
1.5 KiB
Python
|
#!/usr/bin/env python3
|
||
|
|
"""
|
||
|
|
Pruebas con open de Python
|
||
|
|
|
||
|
|
w = write
|
||
|
|
r = read
|
||
|
|
a = append
|
||
|
|
b = binary
|
||
|
|
+ = read and write
|
||
|
|
"""
|
||
|
|
|
||
|
|
f = open('example.txt', 'w') # Cuidado! Que borra lo que haya en el fichero
|
||
|
|
f.write('¡Hola mundo!\n')
|
||
|
|
f.write('k ase')
|
||
|
|
f.close()
|
||
|
|
|
||
|
|
f = open('example.txt', 'a')
|
||
|
|
f.write('\n¡Hasta luego mundo!\n')
|
||
|
|
f.close()
|
||
|
|
|
||
|
|
# Lo más óptimo es usar with
|
||
|
|
# De esta manera se cierra automáticamente el fichero
|
||
|
|
|
||
|
|
with open('example.txt', 'r') as f:
|
||
|
|
file_content = f.read()
|
||
|
|
|
||
|
|
print(file_content)
|
||
|
|
|
||
|
|
|
||
|
|
# Se puede leer línea a línea
|
||
|
|
# end='' para que no haga un salto de línea
|
||
|
|
# line.strip() para quitar los espacios en blanco
|
||
|
|
|
||
|
|
with open('/etc/hosts', 'r') as f:
|
||
|
|
for line in f:
|
||
|
|
print(line, end='')
|
||
|
|
|
||
|
|
# Se puede crear una lista con el contenido del fichero
|
||
|
|
|
||
|
|
mi_lista = [
|
||
|
|
"Primera línea\n",
|
||
|
|
"Segunda línea\n",
|
||
|
|
"Tercera línea\n",
|
||
|
|
"Cuarta línea\n"
|
||
|
|
]
|
||
|
|
|
||
|
|
with open('example.txt', 'w') as f:
|
||
|
|
f.writelines(mi_lista)
|
||
|
|
|
||
|
|
with open('example.txt', 'r') as f:
|
||
|
|
for line in f:
|
||
|
|
print(line, end='')
|
||
|
|
|
||
|
|
# with open("/etc/passwd", "r") as f:
|
||
|
|
# for line in f.readlines(): # Abre todo el fichero y lo mete en una lista
|
||
|
|
# print(line, end='')
|
||
|
|
|
||
|
|
print()
|
||
|
|
|
||
|
|
# with open("/etc/passwd", "r") as f:
|
||
|
|
# for line in f.readline(): # Abre solo la primera línea
|
||
|
|
# print(line, end='')
|
||
|
|
|
||
|
|
|
||
|
|
with open("example.txt", "w") as f:
|
||
|
|
print("Primera línea", file=f) # También se puede guardar así
|
||
|
|
|
||
|
|
with open("example.txt", "r") as f:
|
||
|
|
for line in f:
|
||
|
|
print(line, end='')
|