Writing files
How to create a file and fill it with content.
To open a file for writing one uses the same method a when reading files, only the
second argument to
file is different.
The content of the file is then writen using the
write or writelines
methods of the file object.
Zdroj: (fileio6-1.py)
1 f = file( "tryout.txt", "w") # open file "tryout.txt" for "w"riting 2 3 f.write("Hi there.") # write something to the file 4 f.write("How do you do?") # write something more 5 6 f.close() # close the file
Hi there.How do you do?
Doba běhu: 21.5 ms
Contrary to what one would expect, the method
writelines does not add new-line
characters at the end of individual lines. This is in order to be consistent with the
readlines method.
Zdroj: (fileio6-2.py)
1 f = file( "tryout.txt", "w") # open file "tryout.txt" for "w"riting 2 3 lines1 = ["first line.", "second line.", "the third one."] 4 lines2 = ["first line.\n", "second line.\n", "the third one.\n"] 5 6 f.writelines( lines1) # write all the lines from a sequence to f 7 f.writelines( lines2) # write all the lines from a sequence to f 8 9 f.close() # close the file
first line.second line.the third one.first line. second line. the third one.
Doba běhu: 21.1 ms