刚安装Python，在IDLE中输入print “Hello World”，谁知却发生错误：
>>> print "Hello World"
SyntaxError: invalid syntax
而在朋友的机子上测试却运行无误，经查得知这是Python 版本不同所致。朋友用的是2.x版本，而我用的是3.x版本
正确命令：print("Hello World")
问题是通过用help命令解决的。输入help(print)就知道print的正确用法了。
>>> help(print)Help on built-in function print in module builtins:
print(...) print(value, ..., sep=' ', end='\n', file=sys.stdout, flush=False) Prints the values to a stream, or to sys.stdout by default. Optional keyword arguments: file: a file-like object (stream); defaults to the current sys.stdout. sep: string inserted between values, default a space. end: string appended after the last value, default a newline. flush: whether to forcibly flush the stream.
2013-07-26 15:13:28
