Método write () de arquivo Python

Descrição

Método de arquivo Python write()grava uma string str no arquivo. Não há reembolso. Devido ao armazenamento em buffer, a string pode não aparecer no arquivo até que o método flush () ou close () seja chamado.

Sintaxe

A seguir está a sintaxe para write() método -

fileObject.write( str )

Parâmetros

str - Esta é a string a ser gravada no arquivo.

Valor de retorno

Este método não retorna nenhum valor.

Exemplo

O exemplo a seguir mostra o uso do método write ().

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 write 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

str = "This is 6th line"
# Write a line at the end of the file.
fo.seek(0, 2)
line = fo.write( str )

# Now read complete file from beginning.
fo.seek(0,0)
for index in range(6):
   line = fo.next()
   print "Line No %d - %s" % (index, line)

# Close opend file
fo.close()

Quando executamos o programa acima, ele produz o seguinte resultado -

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

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