[Python-Dev] New Wiki page - PrintAsFunction (original) (raw)

Ron Adam rrr at ronadam.com
Sat Sep 3 10:28:33 CEST 2005

Nick Coghlan wrote:

All,

I put up a Wiki page for the idea of replacing the print statement with an easier to use builtin: http://wiki.python.org/moin/PrintAsFunction Cheers, Nick.

Looks like a good start, much better than just expressing opinions. :-)

How about making it a class?

There are several advantages such as persistent separators and being able to have several different instances active at once.

Cheers, Ron

import sys class Print(object): newline = '\n' sep = ' ' def init(self, out=sys.stdout): self.out = out def call(self, *args, **kwds): savesep = self.sep try: self.sep = kwds['sep'] except KeyError: pass for arg in args[:1]: self.out.write(str(arg)) for arg in args[1:]: self.out.write(self.sep) self.out.write(str(arg)) self.sep = savesep def ln(self, *args, **kwds): self(*args, **kwds) self.out.write(self.newline)

default "builtin" instance

write = Print() # could be print in place of write in python 3k.

standard printing

write.ln(1, 2, 3)

print without spaces

write.ln(1, 2, 3, sep='')

print comma separated

write.ln(1, 2, 3, sep=', ')

or

write.sep = ', ' # remain until changed write.ln(1, 2, 3) write.ln(4, 5, 6) write.sep = ' '

print without trailing newline

write(1, 2, 3)

print to a different stream

printerr = Print(sys.stderr) printerr.ln(1, 2, 3)

print a simple sequence

write.ln(*range(10))

Print a generator expression

write.ln((xx for x in range(10)))

print to file

f = open('printout.txt','w') fileprint = Print(f) fileprint("hello world\n") f.close()

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