bo*******@yahoo.com wrote:
The module string has a function called translate. I tried to find the
source code for that function. In:
C:\Python24\Lib
there is one file called
string.py
I open it and it says
"""A collection of string operations (most are no longer used).
Warning: most of the code you see here isn't normally used nowadays.
Beginning with Python 1.6, many of these functions are implemented as
methods on the standard string object. They used to be implemented by
a built-in module called strop, but strop is now obsolete itself."""
Inside the file string.py I couldn't find the source code for
translate. Where could it be?
in the string.py module, of course.
if you read that comment again, you'll notice that it says
many of these functions are implemented as methods on the
standard string object
and if you search for translate in string.py, you'll also find the source
code for the translate function
# Character translation through look-up table.
def translate(s, table, deletions=""):
/... docstring snipped .../
if deletions:
return s.translate(table, deletions)
else:
# Add s[:0] so that if s is Unicode and table is an 8-bit string,
# table is converted to Unicode. This means that table *cannot*
# be a dictionary -- for that feature, use u.translate() directly.
return s.translate(table + s[:0])
which calls the translate method to do the work, just as the comment
said.
to find the method implementation, you have to look at the string object
implementation. it's in the Objects directory in the source distribution.
</F>
