“打印"在Python 3中引发无效的语法错误 [英] "print" throws an invalid syntax error in Python 3

问题描述

我是python的新手.我一直在从事Codecademy的课程.我目前也在使用Pydev/LiClipse.

I am brand new to python. I have been working on the courses on Codecademy. I am also currently using Pydev / LiClipse.

在Codecademy的第一课中，它希望您将变量鹦鹉设置为挪威蓝".然后，它希望您使用len字符串方法打印鹦鹉的长度.这很简单，我马上就得到了答案:

In one of the first lessons on Codecademy it wants you to set the variable parrot to "Norwegian Blue". Then it wants you to print the length of parrot using the len string method. It is very simple, and I got the answer right away with:

parrot = "Norwegian Blue"
print len(parrot)

当我将完全相同的代码放入LiClipse时，它返回:

When I put the exact same code into LiClipse it returned:

SyntaxError:语法无效

SyntaxError: invalid syntax

当我将其更改为以下内容时，它就可以在LiClipse中使用:

It work in LiClipse when I changed it to:

打印(len(parrot))

print (len(parrot))

有人可以让我知道为什么这可以在代码学院工作，但不能在LiClipse中工作，为什么还要加上括号来修复它?

Can someone let me know why that worked in codecademy, but not in LiClipse, and why adding the parenthesis fixed it?

推荐答案

听起来Pydev/LiClipse使用的是Python 3，而Codeacademy使用的是python 2.x或其他旧版本.现在，将python从2.x更新到3时所做的更改之一是打印.

It sounds like Pydev/LiClipse is using Python 3 while Codeacademy is using python 2.x or some other older version. One of the changes made when python updated from 2.x to 3 was print is now a function.

Python 2:

print "stuff to be printed"

Python 3:

print("stuff to be printed")

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