File write( ) Method in Python 3
The method write() writes a string str to the file. There is no return value. Due to
buffering, the string may not actually show up in the
file until the flush() or close() method is called.
Syntax
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fileObject.write(
str )
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Parameters
str - This is the String to
be written in the file.
Return Value
This method
does not return any value.
Example
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Assuming
that 'foo.txt' file contains following text:
This is
1st line
This is
2nd line
This is
3rd line
This is
4th line
This is
5th line
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#!/usr/bin/python3
# Open
a file in read/write mode
fo =
open("abc.txt", "r+")
print
("Name of the file: ", fo.name)
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 = next(fo)
print ("Line No %d - %s" %
(index, line))
# Close
opened file
fo.close()
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When we run the above program, it produces the
following result-
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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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