python print'hello' File "<stdin>",line 1 print 'hello' SyntaxError:invalid synt

python print'hello' File "<stdin>",line 1 print 'hello' SyntaxError:invalid syntax

刚开始看Python，照着书上些了个hello，结果错误：

>>> print 'hello'
  File "<stdin>", line 1
    print 'hello'
                ^
SyntaxError: invalid syntax



查看3.0文档：http://docs.python.org/release/3.0.1/whatsnew/3.0.html，发现从3.0开始print改成了

print()。文档是这样写的：The print statement has been replaced with a print() function, with keyword arguments to replace most of the special syntax of the old print statement (PEP 3105).

print语句被print()方法代替，旧print语句中的特定的语法被参数代替。

所以呢，hello world！应该写成这样：print ("hello world!")