I'm using the Play Framework 2.2.3 for my first time and I'm having a lot of trouble importing anorm._ and api.db.DB so I can set up my SQL databases.
My set-up is this:
MainController.scala
import play.api._
import play.api.mvc._
import play.api.db.DB
import anorm._
object MainController extends Controller {...}
application.conf
# db.default.driver=com.mysql.jdbc.Driver
# db.default.url="jdbc:mysql:/usr/local/path/to/database"
build.sbt
libraryDependencies += "mysql" % "mysql-connector-java" % "5.1.27"
My first question is whether or not I'm setting up MySQL database connection correctly. The other thing is that when I try to find the import with my IntelliJ, it finds it great. But when I compile in my browser, I get a compilation error: object db is not a member of package play.api. Any tips?
I downloaded both Play 2.2.2 and 2.2.3, and with both I had this problem so version problems are ruled out. I installed from the website, I unzipped the file into my Home folder, and used
play new app
cd app/
play
idea with-sources=yes
for my installation. I honestly just have no idea what's going on.
I have got the same issue and it's resolved by adding: "com.typesafe.play" % "play-iteratees_2.10" % "2.2.3", in my build.scala file.
simply add this to your dependency
<dependency>
<groupId>com.typesafe.play</groupId>
<artifactId>play-jdbc_2.11</artifactId>
<version>2.4.6</version>
</dependency>
Related
I am trying to run the following code to train paddleOCR.
import paddle
import paddle.distributed as dist
But I'm getting this error:
ModuleNotFoundError: No module named 'paddle.distributed'
Even after I have installed paddle-client.
docker pull paddlepaddle/paddle:2.3.0-gpu-cuda11.2-cudnn8
I use this images which can work well.
You can try the paddlepaddle with 2.3.1 version，and quick install can refer to: https://www.paddlepaddle.org.cn/en
I am trying to use ImageDataBunch from fastai, and it worked fine, but recently when I ran my code, it showed this error ModuleNotFoundError: No module named 'fastai.vision'
Then, I upgraded my fastai version pip install fastai --upgrade. This error got cleared but landed in NameError: name 'ImageDataBunch' is not defined
Here's my code:
import warnings
import numpy as np
from fastai.vision import *
warnings.filterwarnings("ignore", category=UserWarning, module="torch.nn.functional")
np.random.seed(42)
data = ImageDataBunch.from_folder(path, train='.', valid_pct=0.2,
ds_tfms=get_transforms(), size=224, num_workers=4, no_check=True).normalize(imagenet_stats)
How can I fix this?
I actually ran into this same issue when I started using Colab, but haven't been able to reproduce it. Here was the thread describing what I and another developer did to troubleshoot: https://forums.fast.ai/t/no-module-named-fastai-data-in-google-colab/78164/4
I would recommend trying to factory reset your runtime ( "Runtime" -> "Factory Reset Runtime")
Then you can check which version of fastai you have (you have to restart the runtime to use the new version if you've already imported it)
import fastai
fastai.__version__
I'm able to run fastai.vision import * on fastai version 1.0.61 and 2.0.13
In Google Colab:
Upgrade fastai on colab:
! [ -e /content ] && pip install -Uqq fastai
Import necessary libraries:
from fastai.vision.all import *
from fastai.text.all import *
from fastai.collab import *
from fastai.tabular.all import *
Get the images and annotations:
path = untar_data(URLs.PETS)
path_anno = path/'annotations'
path_img = path/'images'
print( path_img.ls() ) # print all images
fnames = get_image_files(path_img) # -->> 7390 images
print(fnames[:5]) # print first 5 images
The solution that worked for me is to copy to (connect) my google drive & then run the cells. Source
You might have installed the older version of fastai. You need to upgrade to fastaiv2. You can upgrade fastai by using pip as shown below.
!pip install fastai --upgrade
Also check your fastai version using
import fastai
print(fastai.__version__)
I am using a Gson library for parsing Json data. I am trying to run a program from terminal as follows:
scala -classpath "*.jar" JsonParsing.scala
To which I am getting the following error:
JsonParsing.scala:2: error: object google is not a member of package com import com.google.gson.Gson
I am unsure as why this error is coming. When I have gson jar in accurate folder.
gson-2.2.2.jar
I am using import statements as follows:
import com.google.gson.Gson
import com.google.gson.JsonObject
import com.google.gson.JsonParser
Help on this error would be appreciated. Thanks.
Your dependancy not include google package.
You can use :
// https://mvnrepository.com/artifact/com.google.code.gson/gson
libraryDependencies += "com.google.code.gson" % "gson" % "2.8.0"
or download appropriate jar http://www.java2s.com/Code/Jar/g/gson.htm
Compile:
$ scalac -classpath <path_to_your_jar_files> -d classes " path/to/classes/you/want/to/compile/*
Execute:
$ scala -classpath classes:<path_to_your_jar_files> com.your.package.ClassYouWantToRun
This is not a good way of doing it because it's not scalable. You should be using a tool like SBT to build and run projects.
I'm starting to develop a Scala application with Swing using SBT. I figured out that I need two dependencies for a start, so that's scala-swing and javax.swing.SwingUtilities.
I've been searching the web, maven repositories and github, but stil couldn't find, where did the javax.swing package go.
So far I have found javax in Maven Repos, but javax.swing is not listed there for some reason.
I tried to add a javax dependency to my Build.scala:
val javax = "javax" % "javaee-api" % "7.0"
SBT downloaded several packages. Then I launched the terminal:
scala> import javax.swing.SwingUtilities
import javax.swing.SwingUtilities
scala> SwingUtilities.invokeLater()
<console>:9: error: not enough arguments for method invokeLater: (x$1: Runnable)Unit.
Unspecified value parameter x$1.
SwingUtilities.invokeLater()
^
That's scala console being launched from sbt project. So as you can see, import was successful and the console knows about invokeLater() method. But IntelliJ Idea still does not, it marks javax.swing as unresolvable, though it has downloaded the packages.
I'm completely stuck here.
javax.swing is part of any standard Java SE installation (see http://docs.oracle.com/javase/6/docs/api/ - there you have SwingUtilities), so there is no need to add a dependency. You only need the scala-swing dependency:
libraryDependencies += "org.scala-lang" % "scala-swing" % scalaVersion.value
If IntelliJ IDEA doesn't see javax.swing, you have probably not yet defined an "SDK". Go to File -> Project Structure -> Platform Settings -> SDKs. There you should have at least one entry such as "1.6" for Java 1.6 or "1.7" for Java 1.7. If not, press the "+" to add one and locate the appropriate Java home directory for the version you want to use (depends on your OS).
I know that the scala swing libraries are present in scala 2.8:
[info] Building project chart 1.0 against Scala 2.8.1
[info] using sbt.DefaultProject with sbt 0.7.4 and Scala 2.7.7
So how come I'm getting this error:
[error] /src/main/scala/Chart.scala:2: value swing is not a member of package scala
[error] import scala.swing.Panel
Is it because SBT is using the wrong version of scala (i.e. 2.7.7)? If so, how do I configure it to use the correct version?
EDIT: Answer
Following Dylan Lacey's answer, I made the following file sbt/project/build/chart.scala:
import sbt._
class SamplesProject(info: ProjectInfo) extends DefaultProject(info)
{
val scalaSwing = "org.scala-lang" % "scala-swing" % "2.8.1"
}
Then I ran: sbt reload update from the shell.
Now things compile!
For sbt 0.11 (and presumably 0.10) then adding the following to build.sbt will do it:
libraryDependencies <+= scalaVersion { "org.scala-lang" % "scala-swing" % _ }
No. The version information reported on line 2 is just the version sbt was built with, it won't effect your build.
Because Swing is a package (Not part of the base classes) I suspect the problem is one of two things. Either:
Your build file doesn't specify that you want to use scala-swing and is getting confused. You can correct this by adding:
val scalaSwing = "org.scala-lang" % "scala-swing" % "packageVersion"
in your /project/build/projectName.scala (Thanks Janx!)
You've added the dependancy but have not yet downloaded the required package. To do this, you need sbt to reload your project definition and then get all required packages:
sbt reload update
If you need option 1, you'll likely need to also do option 2.
If neither of these work, you may have confused your local respository horribly. That can be fixed with a sbt clear-lib, but you will then re-download all your packages.