1 >>> s = 'Hello, world.' 2 >>> str(s) 3 'Hello, world.' 4 >>> repr(s) 5 "'Hello, world.'" 6 >>> str(1.0/7.0) 7 '0.142857142857' 8 >>> repr(1.0/7.0) 9 '0.14285714285714285' 10 >>> x = 10 * 3.25 11 >>> y = 200 * 200 12 >>> s = 'The value of x is ' + repr(x) + ', and y is ' + repr(y) + '...' 13 >>> print s 14 The value of x is 32.5, and y is 40000... 15 >>> # The repr() of a string adds string quotes and backslashes: 16 ... hello = 'hello, world\n' 17 >>> hellos = repr(hello) 18 >>> print hellos 19 'hello, world\n' 20 >>> # The argument to repr() may be any Python object: 21 ... repr((x, y, ('spam', 'eggs'))) 22 "(32.5, 40000, ('spam', 'eggs'))"
一種是通過str函數，他會把值轉換為合理形式的字符串，以便用戶可以理解；另一種是通過repr函數，她會創建一個字符串，以合法的Python表達式的形式來表示值。
repr也可以做``反引號的實現。如果希望答應一個包含數字的句子，那么反引號就很有用了。比如：
1 >>> temp = 100 2 >>> print 'hello' + temp 3 4 Traceback (most recent call last): 5 File "<pyshell#1>", line 1, in <module> 6 print 'hello' + temp 7 TypeError: cannot concatenate 'str' and 'int' objects 8 >>> print 'hello'+`temp` 9 hello100