SyntaxError：意外的令牌“打印”

Question

The following code runs fine in IDLE [2.7.8 (default, Jun 30 2014, 16:03:49) [MSC v.1500 32 bit (Intel)]]:

x = 5
if True:
   pass
   x=6
else:
   x=7
print x

But in IronPython ['2.7.3 (IronPython 2.7.3 (2.7.0.40) on .NET 4.0.30319.34014 (64-bit))], the last line gives a SyntaxError: unexpected token 'print'

I copied and pasted the same lines of text in both systems, so they should be the same, including any invisible characters.

What could be the cause?

Answer 1

If you have it on a Microsoft Visual Studio, then it seems that you have to have any print commands in () . So, for example:

print (dictionary_name['notreal'])

or

print (x)

Answer 2

This is a quirk of the interactive interpreter, and has nothing to do with Ironpython vs regular Python. If you save your code in a file and run it, it will work with any Python.

Here is a shorter example that shows the error:

>>> if False:
...      pass
... pass
  File "<stdin>", line 3
    pass
       ^
SyntaxError: invalid syntax

When using the interactive interpreter, you must end a multi-line statement with an empty line, as so:

>>> if False:
...     pass
... 
>>> pass
>>> 

Answer 3

If you're doing python in VS code, always remind yourself to put bracket for print command. print(). It should be worked!