Metodo Python File writelines ()
Descrizione
Metodo file Python writelines()scrive una sequenza di stringhe nel file. La sequenza può essere qualsiasi oggetto iterabile che produce stringhe, in genere un elenco di stringhe. Non esiste alcun valore di ritorno.
Sintassi
Di seguito è riportata la sintassi per writelines() metodo -
fileObject.writelines( sequence )
Parametri
sequence - Questa è la sequenza delle corde.
Valore di ritorno
Questo metodo non restituisce alcun valore.
Esempio
L'esempio seguente mostra l'utilizzo del metodo writelines ().
This is 1st line
This is 2nd line
This is 3rd line
This is 4th line
This is 5th line
#!/usr/bin/python'
# Open a file in witre mode
fo = open("foo.txt", "rw+")
print "Name of the file: ", fo.name
# Assuming file has following 5 lines
# This is 1st line
# This is 2nd line
# This is 3rd line
# This is 4th line
# This is 5th line
seq = ["This is 6th line\n", "This is 7th line"]
# Write sequence of lines at the end of the file.
fo.seek(0, 2)
line = fo.writelines( seq )
# Now read complete file from beginning.
fo.seek(0,0)
for index in range(7):
line = fo.next()
print "Line No %d - %s" % (index, line)
# Close opend file
fo.close()
Quando eseguiamo il programma sopra, produce il seguente risultato:
Name of the file: foo.txt
Line No 0 - This is 1st line
Line No 1 - This is 2nd line
Line No 2 - This is 3rd line
Line No 3 - This is 4th line
Line No 4 - This is 5th line
Line No 5 - This is 6th line
Line No 6 - This is 7th line