All Questions
949
questions
595
votes
15
answers
708k
views
beyond top level package error in relative import [duplicate]
It seems there are already quite some questions here about relative import in python 3, but after going through many of them I still didn't find the answer for my issue.
so here is the question.
I ...
- 10.4k
208
votes
9
answers
206k
views
How to use custom packages
I'm trying to create and use a custom package in Go. It's probably something very obvious but I cannot find much information about this. Basically, I have these two files in the same folder:
mylib.go
...
- 89.9k
207
votes
15
answers
537k
views
Can't import my own modules in Python
I'm having a hard time understanding how module importing works in Python (I've never done it in any other language before either).
Let's say I have:
myapp/__init__.py
myapp/myapp/myapp.py
myapp/...
user623990
137
votes
9
answers
50k
views
#import using angle brackets < > and quote marks " "
I'm wondering what decides whether you're allowed to use <Header.h> or "Header.h" when you're importing files in Objective-C. So far my observation has been that you use the quote marks "" for ...
- 19k
129
votes
3
answers
210k
views
Python: importing a sub‑package or sub‑module
Having already use flat packages, I was not expecting the issue I encountered with nested packages. Here is…
Directory layout
dir
|
+-- test.py
|
+-- package
|
+-- __init__.py
|...
- 7,030
93
votes
6
answers
32k
views
Do unused import and objects have a performance impact?
Do the unused imports and unused objects in Java code create any performance impact?
Suppose an object is initialized and never used, what happens?
And what is the cost of unused imports?
- 3,107
91
votes
3
answers
38k
views
How python deals with module and package having the same name?
Suppose I have a module foo.py and a package foo/. If I call
import foo
which one will be loaded? How can I specify I want to load the module, or the package?
- 22.7k
62
votes
2
answers
36k
views
Access main package from other package
I want to access the main package from another package, but this is impossible because the main file isn't in a directory. I already tried putting the main file in a directory, but when I try to ...
- 3,457
56
votes
7
answers
38k
views
How to reference python package when filename contains a period
I am using django and I have a file named models.admin.py and I want to do the following idea in models.py:
from "models.admin" import *
however, I get a syntax error for having double quotes. But ...
- 40.1k
55
votes
14
answers
423k
views
Java Package Does Not Exist Error
So there's a folder /usr/share/stuff in the root directory
in stuff there are a bunch of java files with package org.name definitions at the top
I am running javac test.java where test.java is in a ...
- 6,701
54
votes
3
answers
30k
views
How do you organise a python project that contains multiple packages so that each file in a package can still be run individually?
TL;DR
Here's an example repository that is set up as described in the first diagram (below): https://github.com/Poddster/package_problems
If you could please make it look like the second diagram in ...
- 4,125
49
votes
3
answers
64k
views
importing a module in nested packages
This is a python newbie question:
I have the following directory structure:
test
-- test_file.py
a
-- b
-- module.py
where test, a and b are folders. Both test and a are on the same level....
- 23.9k
49
votes
2
answers
136k
views
How to use org.apache.commons package?
On various web examples I see imports such as:
import org.apache.commons.net.ftp.FTPClient;
I don't understand how to use these, and the apache website is fairly unclear. How to I use these classes? ...
- 1,973
46
votes
4
answers
19k
views
Relationship between a package statement and the directory of a .go file
See this experiment.
~/go/src$ tree -F
.
├── 1-foodir/
│ └── 2-foofile.go
└── demo.go
1 directory, 2 files
~/go/src$ cat demo.go
package main
import (
"fmt"
"1-foodir"
)
func main() {
...
- 19.8k
44
votes
1
answer
88k
views
Import and usage of different package files in protobuf?
I have imported an other proto which having different package name than mine. For usage of messages from other package, have accessed that message with package name.
For Example :
other.proto
...
- 1,022
42
votes
5
answers
102k
views
Python package import from parent directory
I've the following source code structure
testapp/
├─ __init__.py
├─ testmsg.py
├─ sub/
│ ├─ __init__.py
│ ├─ testprinter.py
where testmsg defines the following constant:
MSG = "Test message&...
user1543863
39
votes
1
answer
28k
views
Flask('application') versus Flask(__name__)
In the official Quickstart, it's recommended to use __name__ when using a single module:
... If you are using a single module (as in this example), you should use __name__ because depending on ...
- 15.8k
39
votes
1
answer
16k
views
When or why to use relative imports in Python [duplicate]
Are there any rules or guidelines concerning when to use relative imports in Python? I see them in use all the time, such as in the Flask web framework. When searching for this topic, I only see ...
- 6,019
37
votes
6
answers
210k
views
Help with packages in java - import does not work
I'm a C++ developer - not a java developer, but have to get this code working...
I have 2 public classes that will be used by another product. I used the package directive in each of the java files. ...
- 20.3k
34
votes
8
answers
6k
views
Too many imports are spamming my Java code
In my project I have a shapes package which has shapes I designed for my graphics program, e.g., Rectangle and Circle. I also have one or two more packages that have the same names as java.awt classes....
- 21.7k
33
votes
1
answer
37k
views
"ValueError: unknown locale: UTF-8" when importing pandas in python 2.7 [duplicate]
I'm very new in python and would like to learn using pandas, but I can't even use the package properly in my python.
In the terminal I tried
$ conda install pandas
The result is:
Fetching package ...
26
votes
7
answers
152k
views
Importing packages in Java
How to import a method from a package into another program? I don't know how to import... I write a lil' code:
package Dan;
public class Vik
{
public void disp()
{
System.out.println(...
- 659
25
votes
4
answers
10k
views
How to only import sub module without exec __init__.py in the package
When import sub module from a package, the __init__.py file in the package folder will be exec first, how can I disable this. Sometimes I only need one function in a package, import the whole package ...
- 96.5k
25
votes
2
answers
12k
views
Import a module from both within same package and from outside the package in Python 3
Okay, the scenario is very simple. I have this file structure:
.
├── interface.py
├── pkg
│ ├── __init__.py
│ ├── mod1.py
│ ├── mod2.py
Now, these are my conditions:
mod2 needs to import mod1....
- 2,078
24
votes
2
answers
50k
views
Java Package Import Alias [duplicate]
Is it possible in Java to import packages and give this package import a specific name?
I currently have a class, which uses some DTO's from a backend and a service package. In both packages the DTO'...
- 460
24
votes
6
answers
54k
views
relative path not working even with __init__.py
I know that there are plenty of similar questions on stack overflow. But the common answer doesn't seem to be working for me.
I have a file structure like this
proj/
lib/
__init__....
- 1,259
23
votes
5
answers
7k
views
Python import precedence: packages or modules?
I wasn't clear how to correctly name this question.
Case 1
Assume that I have the following directory structure.
foo
|
+- bar/__init__.py
|
+- bar.py
If I have
from foo import bar
How do I know ...
- 5,987
22
votes
2
answers
9k
views
import fails when running python as script, but not in iPython?
I have a project structured as such:
folder1
|
folder2
|
tests
I have __init__.py in each folder. When I am in the parent directory of folder1, I run iPython ...
- 6,811
21
votes
4
answers
75k
views
Java referencing a class in the same directory
I created a Pair class in Java (similar to the c++ pair) and am having trouble referencing it from a different java file. I am working inside a Java file, let's call it fileA in the same directory as ...
- 15.8k
21
votes
5
answers
21k
views
Is it possible to use two Python packages with the same name?
I have a question about imports. The question might seem a bit contrived, but its purpose is to explore the limitations of using absolute imports for all imports in a package. PEP8 highly ...
- 6,079
21
votes
1
answer
26k
views
You can mark the path "..." as external to exclude it from the bundle - how?
I have a repository that I published to a package. I installed this package in another repository and want to use it but I get an error: (where the ... are the name of any package that trying to ...
- 1,987
20
votes
1
answer
13k
views
Python files - import from each other
I would like for two of my python files to import some methods from each other. This seems to be giving me import errors.
Example:
file_A.py:
from file_B import do_B_stuff
file_B.py:
from ...
- 49.9k
20
votes
2
answers
43k
views
python import module from parent package
I have the following directory structure
foo/
__init__.py
settings.py
bar/
__init__.py
myfile.py
In myfile.py I have:
import settings
I get the following error: ...
- 10.7k
20
votes
1
answer
14k
views
Difference in package importing between Python 2.7 and 3.4
For this directory hierarchy:
.
├── hello
│ ├── __init__.py
│ └── world
│ └── __init__.py
└── test.py
And the Python source files:
test.py:
if __name__ == '__main__':
import hello
...
- 1,988
20
votes
5
answers
29k
views
VSCode 1.39.x & Python 3.7.x: "ImportError: attempted relative import with no known parent package" - when started without debugging (CTRL+F5))
when running Python test from withing VS Code using CTRL+F5 I'm getting error message
ImportError: attempted relative import with no known parent package
when running Python test from VS Code ...
- 1,532
19
votes
4
answers
28k
views
From request import PandaRequest ImportError: No module named 'request'
I am trying to use panda. When I import it as
import panda as pd
I get this error
File "/usr/local/lib/python3.5/dist-packages/panda/__init__.py", line 1, in <module>
from request import ...
- 641
19
votes
8
answers
6k
views
Automatically remove explicit package declarations with import statements in Java
I have a project created by others that includes thousands of class files and has the package names explicitly typed out for every reference to any of their classes. It looks like the code was reverse ...
- 11.5k
19
votes
1
answer
2k
views
Imports and Depends
I have read two recent posts that discuss Depends and Imports
Upcoming NAMESPACE, Depends, Imports changes for 2.14.0 (some definitions/use please)
Better explanation of when to use Imports/Depends
...
- 679
17
votes
1
answer
3k
views
How to group imports in Rust with conditional compilation?
I am looking to group all my imports with conditional compilation.
I know that the #[cfg(target_os = "windows")] attribute organises the import, but it only works for one import.
How can I import ...
- 6,722
17
votes
8
answers
93k
views
Java error - bad source file: file does not contain class x . Please remove or make sure it appears
Recently started studying Java for an exam.
While learning packages, tried this and got an error message. What I did was
//Creating class A (Within package the package: com.test.helpers)
package ...
- 181
16
votes
3
answers
35k
views
python import module from a package
folder structure:
<current dir>
main.py
packages <dir>
__init__.py
mod.py
main py:
import packages
print packages.mod.hello()
mod.py:
def hello():
return 'hello'...
- 1,714
16
votes
3
answers
16k
views
How does javac automatically compile dependencies of a class
Given the following directory structure:
/top
|--- wrk
|--- pkg
|--- A.java
|--- B.java
Assume that the two files A.java and B.java contain the ...
- 1,413
15
votes
6
answers
29k
views
Eclipse cant recognize com.sun.net.httpserver.HttpServer package
I have a home-work to create a http server with java , a simple one and from scratch .
After searching google and here ...i found
this link "see the best response"
with a very nice response ,so i copy/...
- 741
15
votes
3
answers
28k
views
R, Python: install packages on rpy2
I'm using R in my Python script through the rpy2 library and I need a package that is not in the default installation of R. How can I install it?
install.packages("DirichletReg", repos="http://r-...
- 22.6k
15
votes
1
answer
7k
views
How to solve AttributeError when importing igraph?
When I import the igraph package in my project, I get an AttributeError. This only happens in the project directory:
[12:34][~]$ python2
Python 2.7.1 (r271:86832, Apr 15 2011, 12:09:10)
[GCC 4.5.2 ...
- 302
15
votes
1
answer
9k
views
Running python scripts within a subpackage of my package
Having some trouble figuring out the correct, python 2.x preferred way to do relative imports so that I can keep test scripts together in one subpackage, and have those test scripts be able to test my ...
- 767
15
votes
8
answers
16k
views
Actionscript 3 import package.* vs import package.Class
In Actionscript 3, is there any reel overhead between importing a full package versus importing independant classes?
E.g.: import flash.display.* vs. import flash.display.Sprite
I know it's a good ...
- 17.3k
15
votes
1
answer
20k
views
Yet another ImportError: attempted relative import with no known parent package [duplicate]
I have the following directory structure:
py_test
├── __init__.py
├── dir1
│ ├── __init__.py
│ └── script1.py
└── dir2
├── __init__.py
└── script2.py
In script2 I want to "import ..\...
13
votes
5
answers
219k
views
Java : Accessing a class within a package, which is the better way?
If I access a class within a package using fully qualified name, without importing it, whether it saves any memory?
Using fully qualified class name :
java.lang.Math.sqrt(x);
Import package :
...
- 3,404
13
votes
6
answers
9k
views
Matlab cannot see some of my java classes (not all) in jar package
I have a problem that is driving me nuts.
Matlab sees only some of my classes embeded in a JAR file
If I compile the classes outside of a package and add the path to the class in Matlab using ...
- 662