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I"m new to Python and Django.
I"m configuring a Django project using a PostgreSQL database engine backend, But I"m getting errors on each database operation. For example when I run manage.py syncdb
, I"m getting:
C:xampphtdocsdjangodir>python manage.py syncdb
Traceback (most recent call last):
File "manage.py", line 11, in <module>
execute_manager(settings)
File "C:Python27libsite-packagesdjangocoremanagement\__init__.py", line
438, in execute_manager
utility.execute()
File "C:Python27libsite-packagesdjangocoremanagement\__init__.py", line
379, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "C:Python27libsite-packagesdjangocoremanagement\__init__.py", line
261, in fetch_command
klass = load_command_class(app_name, subcommand)
File "C:Python27libsite-packagesdjangocoremanagement\__init__.py", line
67, in load_command_class
module = import_module("%s.management.commands.%s" % (app_name, name))
File "C:Python27libsite-packagesdjangoutilsimportlib.py", line 35, in im
port_module
__import__(name)
File "C:Python27libsite-packagesdjangocoremanagementcommandssyncdb.py"
, line 7, in <module>
from django.core.management.sql import custom_sql_for_model, emit_post_sync_
signal
File "C:Python27libsite-packagesdjangocoremanagementsql.py", line 6, in
<module>
from django.db import models
File "C:Python27libsite-packagesdjangodb\__init__.py", line 77, in <modul
e>
connection = connections[DEFAULT_DB_ALIAS]
File "C:Python27libsite-packagesdjangodbutils.py", line 92, in __getitem
__
backend = load_backend(db["ENGINE"])
File "C:Python27libsite-packagesdjangodbutils.py", line 33, in load_back
end
return import_module(".base", backend_name)
File "C:Python27libsite-packagesdjangoutilsimportlib.py", line 35, in im
port_module
__import__(name)
File "C:Python27libsite-packagesdjangodbackendspostgresqlase.py", li
ne 23, in <module>
raise ImproperlyConfigured("Error loading psycopg module: %s" % e)
django.core.exceptions.ImproperlyConfigured: Error loading psycopg module: No mo
dule named psycopg
Can someone give me a clue on what is going on?
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How to set up a PostgreSQL database in Django __del__: Questions
How can I make a time delay in Python?
5 answers
I would like to know how to put a time delay in a Python script.
Answer #1
import time
time.sleep(5) # Delays for 5 seconds. You can also use a float value.
Here is another example where something is run approximately once a minute:
import time
while True:
print("This prints once a minute.")
time.sleep(60) # Delay for 1 minute (60 seconds).
Answer #2
You can use the sleep()
function in the time
module. It can take a float argument for sub-second resolution.
from time import sleep
sleep(0.1) # Time in seconds
How to set up a PostgreSQL database in Django __del__: Questions
How to delete a file or folder in Python?
5 answers
How do I delete a file or folder in Python?
Answer #1
os.remove()
removes a file.os.rmdir()
removes an empty directory.shutil.rmtree()
deletes a directory and all its contents.
Path
objects from the Python 3.4+ pathlib
module also expose these instance methods:
pathlib.Path.unlink()
removes a file or symbolic link.pathlib.Path.rmdir()
removes an empty directory.
We hope this article has helped you to resolve the problem. Apart from How to set up a PostgreSQL database in Django, check other __del__-related topics.
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Shanghai | 2023-03-24
ast Python module is always a bit confusing 😭 How to set up a PostgreSQL database in Django is not the only problem I encountered. Will get back tomorrow with feedback
Boston | 2023-03-24
I was preparing for my coding interview, thanks for clarifying this - How to set up a PostgreSQL database in Django in Python is not the simplest one. Will get back tomorrow with feedback
London | 2023-03-24
I was preparing for my coding interview, thanks for clarifying this - How to set up a PostgreSQL database in Django in Python is not the simplest one. I am just not quite sure it is the best method