I would add also the full path to the script file
scrape.py even if it is located into the same directory as your python executable.
Also, I would happen redirection to the command line to get possible error and output into a file, at least for debugging purpose :
*/2 * * * * /git/project/tags/python /full/path/to/scrape.py >>/tmp/scrape.out 2>>&1
This way, the standard output and error output will be appended to the same file.
Also note that the output of any cron activity will be sent by mail to the user owning the crontab in question.