[Python-checkins] python/dist/src/Doc/tut tut.tex,1.180,1.181
montanaro@users.sourceforge.net
montanaro@users.sourceforge.net
Wed, 07 May 2003 08:29:14 -0700
Update of /cvsroot/python/python/dist/src/Doc/tut
In directory sc8-pr-cvs1:/tmp/cvs-serv30681
Modified Files:
tut.tex
Log Message:
replace most uses of `...` by repr(...), noting that `...` is discouraged,
but convenient in interactive sessions.
Index: tut.tex
===================================================================
RCS file: /cvsroot/python/python/dist/src/Doc/tut/tut.tex,v
retrieving revision 1.180
retrieving revision 1.181
diff -C2 -d -r1.180 -r1.181
*** tut.tex 22 Apr 2003 14:30:53 -0000 1.180
--- tut.tex 7 May 2003 15:29:12 -0000 1.181
***************
*** 2766,2772 ****
One question remains, of course: how do you convert values to strings?
Luckily, Python has ways to convert any value to a string: pass it to
! the \function{repr()} or \function{str()} functions, or just write
! the value between reverse quotes (\code{``}, equivalent to
! \function{repr()}).
The \function{str()} function is meant to return representations of
--- 2766,2772 ----
One question remains, of course: how do you convert values to strings?
Luckily, Python has ways to convert any value to a string: pass it to
! the \function{repr()} or \function{str()} functions. Reverse quotes
! (\code{``}) are equivalent to \function{repr()}, but their use is
! discouraged.
The \function{str()} function is meant to return representations of
***************
*** 2787,2812 ****
>>> str(s)
'Hello, world.'
! >>> `s`
"'Hello, world.'"
>>> str(0.1)
'0.1'
! >>> `0.1`
'0.10000000000000001'
>>> x = 10 * 3.25
>>> y = 200 * 200
! >>> s = 'The value of x is ' + `x` + ', and y is ' + `y` + '...'
>>> print s
The value of x is 32.5, and y is 40000...
! >>> # Reverse quotes work on other types besides numbers:
! ... p = [x, y]
! >>> ps = repr(p)
! >>> ps
! '[32.5, 40000]'
! >>> # Converting a string adds string quotes and backslashes:
... hello = 'hello, world\n'
! >>> hellos = `hello`
>>> print hellos
'hello, world\n'
! >>> # The argument of reverse quotes may be a tuple:
... `x, y, ('spam', 'eggs')`
"(32.5, 40000, ('spam', 'eggs'))"
--- 2787,2810 ----
>>> str(s)
'Hello, world.'
! >>> repr(s)
"'Hello, world.'"
>>> str(0.1)
'0.1'
! >>> repr(0.1)
'0.10000000000000001'
>>> x = 10 * 3.25
>>> y = 200 * 200
! >>> s = 'The value of x is ' + repr(x) + ', and y is ' + repr(y) + '...'
>>> print s
The value of x is 32.5, and y is 40000...
! >>> # The repr() of a string adds string quotes and backslashes:
... hello = 'hello, world\n'
! >>> hellos = repr(hello)
>>> print hellos
'hello, world\n'
! >>> # The argument to repr() may be any Python object:
! ... repr(x, y, ('spam', 'eggs'))
! "(32.5, 40000, ('spam', 'eggs'))"
! >>> # reverse quotes are convenient in interactive sessions:
... `x, y, ('spam', 'eggs')`
"(32.5, 40000, ('spam', 'eggs'))"
***************
*** 2818,2824 ****
>>> import string
>>> for x in range(1, 11):
! ... print string.rjust(`x`, 2), string.rjust(`x*x`, 3),
... # Note trailing comma on previous line
! ... print string.rjust(`x*x*x`, 4)
...
1 1 1
--- 2816,2822 ----
>>> import string
>>> for x in range(1, 11):
! ... print string.rjust(repr(x), 2), string.rjust(repr(x*x), 3),
... # Note trailing comma on previous line
! ... print string.rjust(repr(x*x*x), 4)
...
1 1 1
***************
*** 3358,3362 ****
... self.value = value
... def __str__(self):
! ... return `self.value`
...
>>> try:
--- 3356,3360 ----
... self.value = value
... def __str__(self):
! ... return repr(self.value)
...
>>> try: