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

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 replacedwith a

print()function, with keyword arguments to replace most of the specialsyntax of the old
print statement (PEP3105).

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!")