[Tutor] trouble installing library

[eryksun]

On Wed, Apr 24, 2013 at 8:51 AM, Lolo Lolo <losermeloser at yahoo.com> wrote:
> Thanks for the help guys
>
>>> Scripts\activate.bat is a relative path, assuming your current working
>>> directory is that of the virtual environment.
>
> your suggestion work. Initially i was doing Scripts/activate or
> Scripts/activate.bat. I guess it didnt like "/" and i didnt realise the
> difference.

Many Windows APIs accept slash and backslash interchangeably in paths,
but the cmd shell uses slash for options (e.g. dir /a:d) and only
permits backslash in paths.

> python -c 'import googlemaps' or py -3 -c 'import googlemaps' i get this
> error:

Generally you wouldn't  use the py launcher in an active virtual
environment.  The Scripts directory is prepended to the PATH, so just
run "python".

>   File "<string>", line 1
>     'import
>           ^
> SyntaxError: EOL while scanning string literal
>
> which i guess means my program didnt get up to trying to import the file

Notice the single quote. The syntax error is because the command line
was parsed like this:

    ['python', '-c', "'import", "googlemaps'"]

The -c option expects the command to be in the subsequent argument. So
it's as if you had a script with just the following in it:

    'import

Clearly that's a syntax error in the string literal. But you didn't
want a string literal in the first place.

The command line is split into arguments on spaces and tabs. You have
to use quotes for any string you don't want split up.  While a POSIX
shell uses both single and double quotes for this (single-quoted
strings are treated more literally), Microsoft's C/C++ runtime only
uses double quotes. So just change it to the following:

    python -c "import googlemaps"

----

Reference: Parsing C++ Command-Line Arguments
http://msdn.microsoft.com/en-us/library/17w5ykft%28v=vs.100%29