struct is saving 4 bytes instead of 2

[TonyB]

Using UBUNTU python 2.4.3 I'm using struct to save a variable to a
file. My goal is to save it as a 2 byte signed integer. Its being
saved using:

f.write(struct.pack('h',thevariable))

When I inspect the file with a hex editor it show that the variable is
being saved as 4 bytes. How can I make it save the value as 2 bytes?

Tony

 

[Bjoern Schliessmann]

When I inspect the file with a hex editor it show that the
variable is being saved as 4 bytes. How can I make it save the
value as 2 bytes?

Use an aligment specifier in the format string (you want "standard"
alignment). See:

http://docs.python.org/lib/module-struct.html

Regards,


Björn

 

[TonyB]

Use an aligment specifier in the format string (you want "standard"
alignment). See:

http://docs.python.org/lib/module-struct.html

Regards,

Björn

Björn,

I tried

f.write(struct.pack('=h',thevariable))

and it works. Many thanks,
Tony

 

[Bjoern Schliessmann]

I tried

f.write(struct.pack('=h',thevariable))

and it works.

Great!

Regards,


Björn