Thanks for all replies. Ok. I agree. While printf() does tightly control formatting in C, it does not in Python. Using write() can be used to output with no changes to the data.
"Tim Hoffman" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] > Hi Paul > > Based on your description of what you want to do, print is probably not > the correct method of controlling output format. You should use write() > method of the file handle to get unadulterated output. > > print is working as documented . From the Python 2.3 documentation, > Section 6.6 The Print statement. > > "print evaluates each expression in turn and writes the resulting object > to standard output (see below). If an object is not a string, it is first > converted to a string using the rules for string conversions. The > (resulting or original) string is then written. A space is written before > each object is (converted and) written, unless the output system believes > it is positioned at the beginning of a line. This is the case (1) when no > characters have yet been written to standard output, (2) when the last > character written to standard output is "\n", or (3) when the last write > operation on standard output was not a print statement." > > As you can see a space char is written and is correct as per the docs. > > Rgds > > Tim > > Paul Watson wrote: >> #!/usr/bin/env python >> >> # Using a print statement to stdout results in an >> # unwanted space character being generated at the >> # end of each print output. Same results on >> # DOS/Windows and AIX. >> # >> # I need precise control over the bytes that are >> # produced. Why is print doing this? >> # >> import sys >> >> # If this is a DOS/Windows platform, then put stdout >> # into binary mode so that only the UNIX compatible newline >> # will be generated. >> # >> try: >> import msvcrt, os >> msvcrt.setmode(sys.stdout.fileno(), os.O_BINARY) >> except: >> print 'This is not an msvcrt platform.' >> pass >> >> # Using print with newline suppressed generates a space at the >> # end of each print statement. >> # >> for i in range(3): >> print '%d,60,' % (i), >> for j in range(10): >> print '%d,' % (j), >> print '' >> >> # Using a list and doing a join does not result in the space >> # character being generated. >> # >> for i in range(3): >> alist = [] >> alist.append('%d,60,' % (i)) >> for j in range(10): >> alist.append('%d,' % (j)) >> print ''.join(alist) >> >> sys.exit(0) -- http://mail.python.org/mailman/listinfo/python-list
