从文件调用属性时的语法错误

Question

I am trying to execute a file ( threenames.py ) with three attributes a, b, and c each assigned to a string as follows

a = 'New York'
b = 'Baltimore'
c = 'Phoenix'
Print (a, b, c)

and would like to call these using the python code as follows

python threenames.py however I get a syntax error as follows
>>> python threenames.py
File "<stdin>", line 1
python threenames.py
                ^
SyntaxError: invalid syntax

What am I doing wrong?

Answer 1

The >>> is the Python interactive interpreter's prompt. python threenames.py is not a valid Python statement which is why it is giving you an error.

You can exit the Python REPL loop by hitting Ctrl + D or by executing exit() . You will then see you normal shell prompt (probably ending with $ ) and can execute python threenames.py .

You can also instead just import threenames within the Python shell as it will execute all the code in that file but beware: if you update the code in your threenames.py file simply importing it again won't reload the code.

---

I'm assuming that your print formatting comes from actually using Python 2 instead of 3 as your syntax suggests; use it as a statement instead and get rid of the tuple as so:

a = 'New York'
b = 'Baltimore'
c = 'Phoenix'
print a, b, c

Answer 2

When you see the Python interactive interpreter's >>> prompt, type exit() and press Enter . After that you get your shell prompt back, where you can type python threenames.py and then press Enter to run the program.