Question

I ‘m trying to retrieve data from a datastore by using this
(in example)

class Book(db.Model):
title = db.StringProperty()
author = db.StringProperty()
category = db.StringProperty()

e = Book(title ="LOTR",
     author = "JRR Tolkien",
     category = "Adventure")

class Result(webapp.RequestHandler):

 Book = db.GqlQuery("SELECT * FROM Book")
    for book in Book:
        self.responce.out.write('<b>%s</b>' % book.title)

Which this solution is from a google example, but have this result

    Traceback (most recent call last):
  File "/home/kostas89/google_appengine/google/appengine/tools/dev_appserver.py", line 3858, in _HandleRequest
    self._Dispatch(dispatcher, self.rfile, outfile, env_dict)
  File "/home/kostas89/google_appengine/google/appengine/tools/dev_appserver.py", line 3792, in _Dispatch
    base_env_dict=env_dict)
  File "/home/kostas89/google_appengine/google/appengine/tools/dev_appserver.py", line 580, in Dispatch
    base_env_dict=base_env_dict)
  File "/home/kostas89/google_appengine/google/appengine/tools/dev_appserver.py", line 2918, in Dispatch
    self._module_dict)
  File "/home/kostas89/google_appengine/google/appengine/tools/dev_appserver.py", line 2822, in ExecuteCGI
    reset_modules = exec_script(handler_path, cgi_path, hook)
  File "/home/kostas89/google_appengine/google/appengine/tools/dev_appserver.py", line 2697, in ExecuteOrImportScript
    handler_path, cgi_path, import_hook)
  File "/home/kostas89/google_appengine/google/appengine/tools/dev_appserver.py", line 2621, in LoadTargetModule
    module_code = compile(source_file.read(), cgi_path, 'exec')
  File "/home/kostas89/library/library.py", line 77
    for book in Book:
   ^
IndentationError: unexpected indent

I also tried the fetch() method without any result..

EDIT:
Yes but when i delete the indent, i have an error for the ‘self’.

Traceback (most recent call last):
  File "/home/kostas89/google_appengine/google/appengine/tools/dev_appserver.py", line 3858, in _HandleRequest
    self._Dispatch(dispatcher, self.rfile, outfile, env_dict)
  File "/home/kostas89/google_appengine/google/appengine/tools/dev_appserver.py", line 3792, in _Dispatch
    base_env_dict=env_dict)
  File "/home/kostas89/google_appengine/google/appengine/tools/dev_appserver.py", line 580, in Dispatch
    base_env_dict=base_env_dict)
  File "/home/kostas89/google_appengine/google/appengine/tools/dev_appserver.py", line 2918, in Dispatch
    self._module_dict)
  File "/home/kostas89/google_appengine/google/appengine/tools/dev_appserver.py", line 2822, in ExecuteCGI
    reset_modules = exec_script(handler_path, cgi_path, hook)
  File "/home/kostas89/google_appengine/google/appengine/tools/dev_appserver.py", line 2702, in ExecuteOrImportScript
    exec module_code in script_module.__dict__
  File "/home/kostas89/library/library.py", line 74, in <module>
    class Result(webapp.RequestHandler):
  File "/home/kostas89/library/library.py", line 79, in Result
    self.responce.out.write('<b>%s</b>' % book.title)
NameError: name 'self' is not defined

I found that propably is because of the tabs/sapces and I try some solutions but still not working.

Answer 1

Look at the error that’s reported – it’s telling you the right thing:

IndentationError: unexpected indent

Remove the indentation, to produce:

 Book = db.GqlQuery("SELECT * FROM Book")
 for book in Book:
   self.responce.out.write('<b>%s</b>' % book.title)