无法从腻子运行.py文件，语法错误：单词意外（期望“）”）

我对Python和Linux都是陌生的，因此请尽可能在不提供任何假定知识的情况下进行简单的解释，但是我更愿意投入时间和精力进行学习。

I am new to both Python and Linux and as such request simple explanations with minimal assumed knowledge where possible please, however I am more than willing to invest time and effort to learn.

我有一个运行Linux的Raspberry Pi 2（型号B V1.1）。我通过腻子与此pi进行交互。

I have a Raspberry Pi 2 (Model B V1.1) that is running Linux. I interact with this pi via putty.

我正在尝试创建一个简单的竞争性反射游戏，该游戏由2个按钮和一个LED组成。我的目标是使LED在短暂的间隔后点亮，并且第一个按下其按钮的玩家获胜。

I am trying to create a simple competitive reflex game, consisting of 2 buttons and a single LED. My goal is to have the LED light up after a short interval, and the first player to press their button wins.

我正在使用python编写脚本（具体是2.7.3）

I am writing the script for this with python (specifically 2.7.3)

我的问题是我无法从腻子中运行任何.py文件，我总是收到相同的错误：

My issue is that i am unable to run ANY .py file from within putty, i always receive the same error:

Syntax error: word unexpected (expecting ")")

要确定问题是否是我的代码中的错误，我创建了一个非常简单的.py文件，以检查是否发生了相同的错误，并且确实如此。因此，我目前认为，即使我的代码可以正常工作，某些原因也会阻止我运行任何.py文件。

To determine if the issue was an error in my code, i created a very very simple .py file, to check if the same error occurs, and it did. So i currently believe even if my code was functional, something is stopping me from running ANY .py file.

我正在使用的过程如下：

The process I am using is as follows:

首先，我从腻子内部创建一个新的python文件：

First I create a new python file from within putty:

sudo nano test.py

下一步，我输入我的python代码（目前非常简单，因为我无法获取任何.py文件

Next I enter my python code (very simple for now, as i cannot get ANY .py file to run)

for each in range(5):
    print 'hello'

然后按CTRL + O写入文件，按Enter，然后按CTRL + X退出

I then press CTRL + O to write the file, hit enter, then CTRL + X to exit

最后，我使用

sudo chmod u+x test.py

并尝试运行它

sudo ./test.py

再次发生类似的错误

Syntax error: "(" unexpected

然后我决定直接将代码输入python shell ，对于范围（5）中的每一个，使用

I then decided to enter the code directly into the python shell, using

sudo python

>>>for each in range(5):
...    print 'hello'

这次输出是所需的结果：

This time the output is the desired outcome:

hello
hello
hello
hello
hello

因此直接从外壳执行python代码没有问题，我只是无法执行任何以前保存的.py文件

So there is no problem in executing python code directly from the shell, I am just unable to execute any previously saved .py file

对于可能导致此问题的任何见解，我们将不胜感激，如果无法为您提供有用的信息，我深表歉意。

Any insight into what could be causing this is much appreciated, and I apologise if I have not provided enough information to be useful for you.

预先感谢！