Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.python > #89895 > unrolled thread

Why do I get SyntaxError: invalid syntax

Back to article view | Back to comp.lang.python

Contents

  Why do I get SyntaxError: invalid syntax Cecil Westerhof <Cecil@decebal.nl> - 2015-05-04 13:31 +0200
    Re: Why do I get SyntaxError: invalid syntax Chris Angelico <rosuav@gmail.com> - 2015-05-04 22:07 +1000
      Re: Why do I get SyntaxError: invalid syntax Cecil Westerhof <Cecil@decebal.nl> - 2015-05-04 15:16 +0200

#89895 — Why do I get SyntaxError: invalid syntax

While copying pasting code to test, the following works:
    from itertools  import islice
    from os         import rename
    from os.path    import expanduser, split
    from tempfile   import NamedTemporaryFile

    real_file = (expanduser('~/Twitter/testing.txt'))
    (filepath,
     file)      = split(real_file)
    with NamedTemporaryFile(mode = 'w', prefix = file + '_', dir = filepath, delete = False) as tf:
        tempfile = tf.name
        with open(real_file, 'r') as f:
            for line in islice(f, 1, None):
                tf.write(line)

    rename(tempfile, real_file)

But first I used:
    from itertools  import islice
    from os         import rename
    from os.path    import expanduser, split
    from tempfile   import NamedTemporaryFile

    real_file = (expanduser('~/Twitter/testing.txt'))
    (filepath,
     file)      = split(real_file)
    with NamedTemporaryFile(mode = 'w', prefix = file + '_', dir = filepath, delete = False) as tf:
        tempfile = tf.name
        with open(real_file, 'r') as f:
            for line in islice(f, 1, None):
                tf.write(line)
    rename(tempfile, real_file)

But that gave:
      File "<stdin>", line 6
        rename(tempfile, real_file)
             ^
    SyntaxError: invalid syntax

Why?

-- 
Cecil Westerhof
Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof

[toc] | [next] | [standalone]

#89898

On Mon, May 4, 2015 at 9:31 PM, Cecil Westerhof <Cecil@decebal.nl> wrote:
> While copying pasting code to test, the following works:
> [chomp]
> But first I used:
>     with NamedTemporaryFile(mode = 'w', prefix = file + '_', dir = filepath, delete = False) as tf:
>         tempfile = tf.name
>         with open(real_file, 'r') as f:
>             for line in islice(f, 1, None):
>                 tf.write(line)
>     rename(tempfile, real_file)
>
> But that gave:
>       File "<stdin>", line 6
>         rename(tempfile, real_file)
>              ^
>     SyntaxError: invalid syntax
>
> Why?

To clarify: When you say "to test", you mean the interactive
interpreter, right? If so, you need to end blocks of text with blank
lines (and not have any blank lines in between). It's because the
parser has to know when to run stuff; when you run a script, it parses
the whole thing and then runs it, but interactively, it has to work
piece-meal.

ChrisA

[toc] | [prev] | [next] | [standalone]

#89904

Op Monday 4 May 2015 14:07 CEST schreef Chris Angelico:

> On Mon, May 4, 2015 at 9:31 PM, Cecil Westerhof <Cecil@decebal.nl> wrote:
>> While copying pasting code to test, the following works: [chomp]
>> But first I used: with NamedTemporaryFile(mode = 'w', prefix = file
>> + '_', dir = filepath, delete = False) as tf: tempfile = tf.name
>> with open(real_file, 'r') as f: for line in islice(f, 1, None):
>> tf.write(line) rename(tempfile, real_file)
>>
>> But that gave:
>> File "<stdin>", line 6
>> rename(tempfile, real_file)
>> ^
>> SyntaxError: invalid syntax
>>
>> Why?
>
> To clarify: When you say "to test", you mean the interactive
> interpreter, right?

Yes, that is what I mend. Should have been clearer.


> If so, you need to end blocks of text with blank
> lines (and not have any blank lines in between). It's because the
> parser has to know when to run stuff; when you run a script, it
> parses the whole thing and then runs it, but interactively, it has
> to work piece-meal.

OK, thanks: I understand it now.

-- 
Cecil Westerhof
Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof

[toc] | [prev] | [standalone]

Back to top | Article view | comp.lang.python

csiph-web