f.write(chr(10)) ?

[ingo]

Hi all,
I'm just beginning with programming and Python. 
Writing a file using this:

>>> f=open("testpy",'wd')

>>> f.write(chr(10)) 	

>>> f.close()

When I open the file with HexEdit I see:
    	0000: 0D 0A
I expected 
    	0000: 0A

What's wrong?


Ingo

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