The followed method is defined in the pubsub.py which is a python file in the site-package pubsub. When I try to use this, the pycharm tells me this is invalid syntax with an arrow pointing to '->'. I don't why and I have installed the pypubsub.
def getDefaultPublisher() -> Publisher:
"""
Get the Publisher instance created by default when this module
is imported. See the module doc for details about this instance.
"""
return _publisher
You have a Python version mismatch. This version of PyPubSub needs Python3. Last version for Python2 is PyPubSub 3.3.0
pip install PyPubSub==3.3.0
Related
I am trying to use the psycopg2 library with AWS lambda in my Pycharm IDE on Windows 10.
I have tried all versions of Python listed in this repository and I still always get the following error:
{"errorMessage": "Unable to import module 'app': No module named 'psycopg2._psycopg'", "errorType": "Runtime.ImportModuleError", "stackTrace": []}
I have tried this solution where we install aws-psycopg2 but it did not work. As per this solution, I have ensured that my local Python runtime and the Lambda runtime are the same and I still get the error.
I have made sure that my Python version is 64 bit as per this answer
Hey incase it still didn't work, i faced the same issue here's what i did:
ran this command:
pip install --platform=manylinux1_x86_64 --only-binary=:all: psycopg2-binary --target psycopg-binary/python/lib/python3.8/site-packages
created a lambda layer with the above package (pyscopg-binary) and added it to the lambda function
make sure runtimes are correct ( at first i had the lamda layer runtime 3.9 and the function 3.9, then i switched both to 3.8 and it worked)
Im not absolutely sure aside from the runtimes which of the packages caused it to work (since i did multiple things in one step: added aws-psycopg2 to the requirements.txt in addition to changing runtime, hence im not sure if the aws-psycopg2 had anything to do with it working :), but i think that it has nothing to do with it, so it should work without it).
hope this helps.
I am having trouble installing a module I created in Julia. I am running the Julia plugin under Visual Studio Code. If I run the file below with Ctrl+F5 I get a message
ERROR: LoadError: ArgumentError: Package Utils not found in current path:
- Run `import Pkg; Pkg.add("Utils")` to install the Utils package.
This is the file:
module demo
using Utils
greet() = print("Hello World!")
end # module
If I follow the advice on the error message I get another error message:
ERROR: LoadError: The following package names could not be resolved:
* Utils (not found in project, manifest or registry)
I also tried inserting this line:
import Pkg; Pkg.add(path="C:/Dropbox/Code/Julia/demo/src/Utils.jl")
and got this message (although the path definitely exists):
ERROR: LoadError: Path `C:/Dropbox/Code/Julia/demo/src/Utils.jl` does not exist.
The files demo.jl and Utils.jl are in C:\Dropbox\Code\Julia\demo\src\ and the demo project has been activated as can be seen in the REPL. The OS is Windows 10 Pro.
Any help will be greatly appreciated. Lots of time wasted trying to make this work.
Module and packages are not the same things. In short, packages are modules plus a set of metadata that make it easy for the package to be found and interact well with other packages. See here for a tutorial to write Julia packages:
https://syl1.gitbook.io/julia-language-a-concise-tutorial/language-core/11-developing-julia-packages
In your case, if you want to load a local module, just type include("fileWhereThereIsTheModule.jl") followed by a using Main.MyModule or using .MyModule. Note the dot... without it, Julia would indeed look for a package and to let it find your Demo or Util module you would have to either change an environmental variable or place your module file in certain predefined folders. Using include followed by the "absolute or relative position" of the module you don't have to do either.
I have successfully installed the streamlit package using the following
shell command and can run the resulting local server localhost:8501
Python3.8 -m pip install streamlit
In Eclipse, the module appears under the Package Library in the Python Interpreter.
I can import it as a library item in a PyDev module as as follows:
import streamlit
The only note I get from the compiler is that streamlit is an ‘unused import’. However, when I append the command as follows the compiler then says ‘unresloved import st’
import streamlit as st
Both ‘import streamlit’. and ‘import streamlit as st’ will not code complete.
How can I clear the ’unresolved import’ message ?
The sys.path is as follows:
/Users/davidklemitz/eclipse-workspace/streamlit
/Users/davidklemitz/eclipse-workspace/streamlit
/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8
/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/lib-dynload
/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages
/Library/Frameworks/Python.framework/Versions/3.8/lib/python38.zip
Thanks in advance for any help.
I solved the problem. Turns out it was a compound of two issues.
First the name of the PyDev module I chose was the same name as the package module name streamlit.py, installed using the following command
Python3.8 -m pip install streamlit
Second, I had a look at the PYTHONPATH under Eclipse->Preferences-> PyDev->Interpreters-> Python Interpreter where these paths were arranged as follows:
/Library/Frameworks/Python.framework/Versions/3.8/lib
/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages
As streamit.py was in the second and not the first, I reversed the order, restarted Eclipse, created a new PyDev project and associated development model named stream_lit.py and the code completed as expected.
I'm new to Purescript and am following the tutorial for installation. Purescript itself is working and I can start the CLI using pulp psci, but installing purescript-list runs into trouble.
Having entered the command bower install purescript-lists --save, I get a long list of package names, but when it gets to purescript-eff and purescript-prelude I run into some version conflicts:
bower purescript-eff#^2.0.0 cached https://github.com/purescript/purescript-eff.git#2.0.0
bower purescript-eff#^2.0.0 validate 2.0.0 against https://github.com/purescript/purescript-eff.git#^2.0.0
Unable to find a suitable version for purescript-eff, please choose one by typing one of the numbers below:
1) purescript-eff#^1.0.0 which resolved to 1.0.0 and is required by purescript-console#1.0.0
2) purescript-eff#^2.0.0 which resolved to 2.0.0 and is required by purescript-st#2.0.0
Prefix the choice with ! to persist it to bower.json
? Answer
A similar message is shown for purescript-prelude. No matter which options I choose, both pulp build and pulp run fail with:
$ pulp build
* Building project in /Developer/purescript/training1
Error found:
in module PSCI.Support
at /Developer/purescript/training1/bower_components/purescript-psci-support/src/PSCI/Support.purs line 10, column 34 - line 10, column 53
Cannot import value unsafeInterleaveEff from module Control.Monad.Eff.Unsafe
It either does not exist or the module does not export it.
See https://github.com/purescript/purescript/wiki/Error-Code-UnknownImport for more information,
or to contribute content related to this error.
Compiling PSCI.Support
* ERROR: Subcommand terminated with exit code 1
What have I missed here?
Thanks
Chris W
If you are using psc version 0.10.* you should go with prelude, lists and eff v2*.
If you are using psc version 0.9.* you should go with prelude, lists and eff v1*.
If you are using psc 0.10.* you might want to update pulp to version 9.1.0
The problem occurs due to breaking changes between psc 0.9 and 0.10 and the relevant libraries. by writing bower install purescript-lists --save you are asking bower for the latest dependencies which conflict with the dependency versions specified in your bower.json.
I have a whole bunch of working C++ code that I want to write Python bindings for. I'm trying to use Boost.Python since it seems to be the easiest way to get this working, but it isn't cooperating. Here's part of the code for the extension module I'm trying to build:
BOOST_PYTHON_MODULE(libpcap_ext) {
using namespace boost::python;
class_<PacketEngine>("PacketEngine")
.def("getAvailableDevices", &PacketEngine_getAvailableDevices);
}
Bjam seems to be a pain and refuses to recognize my Pythonpath or allow me to link with libpcap, so I'm using CMake. Here's my CMakeLists file, which can import and build everything just fine (outputs libpcap.so as expected):
CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
IF(NOT CMAKE_BUILD_TYPE)
SET(CMAKE_BUILD_TYPE "DEBUG")
#SET(CMAKE_BUILD_TYPE "RELEASE")
#SET(CMAKE_BUILD_TYPE "RELWITHDEBINFO")
#SET(CMAKE_BUILD_TYPE "MINSIZEREL")
ENDIF()
FIND_PACKAGE(Boost 1.55.0)
find_package(PythonLibs REQUIRED)
IF(Boost_FOUND)
INCLUDE_DIRECTORIES("${Boost_INCLUDE_DIRS}" "${PYTHON_INCLUDE_DIRS}")
SET(Boost_USE_STATIC_LIBS OFF)
SET(Boost_USE_MULTITHREADED ON)
SET(Boost_USE_STATIC_RUNTIME OFF)
FIND_PACKAGE(Boost 1.55.0 COMPONENTS python)
ADD_LIBRARY(pcap_ext MODULE PacketWarrior/pcap_ext.cc PacketWarrior/PacketEngine.h PacketWarrior/PacketEngine.cc PacketWarrior/Packet.h PacketWarrior/Packet.cc)
TARGET_LINK_LIBRARIES(pcap_ext pcap)
TARGET_LINK_LIBRARIES(pcap_ext ${Boost_LIBRARIES} ${PYTHON_LIBRARIES})
ELSEIF(NOT Boost_FOUND)
MESSAGE(FATAL_ERROR "Unable to find correct Boost version. Did you set BOOST_ROOT?")
ENDIF()
ADD_DEFINITIONS("-Wall")
And my pcap.py file that attempts to utilize the module:
import libpcap_ext
engine = libpcap_ext.PacketEngine()
print engine.getAvailableDevices()
But whenever I try to run the module, I get the following error:
Traceback (most recent call last):
File "../pcap.py", line 2, in <module>
engine = libpcap_ext.PacketEngine()
TypeError: __init__() should return None, not 'NoneType
I'm assuming it's because Boost.Python is trying to use Python 3 and my system default is Python 2.7.3. I've tried changing my user-config.jam file (in my boost_1_55_0 directory) to point to Python 2.7 and tried building:
# Configure specific Python version.
# using python : 2.7 : /usr/bin/python2.7 : /usr/include/python2.7 : /usr/lib ;
Boost.Python's installation instructions [0] seem to fail for me when I try to build quickstart with bjam (lots of warnings), so I tried following the Boost Getting Started instructions [1] to build a Python header binary, which is I think what is causing this problem. Any recommendations as to how to fix this would be amazing, I've spent hours on this.
This error is probably due to linking against the wrong Python library. Make sure your extension as well as the Boost Python library are linked against the Python installation you are using to import the module.
On Linux you can check against which libraries you've linked with ldd. On OS X otool -L does the same thing. So, for example
otool -L libpcap_ext.so
otool -L /path/to/libboost_python-mt.dylib
should list the Python library they are linked against.
With CMake you can use the variable PYTHON_LIBRARY to change which Python library is used. As an example, on the command line you can set it with
cmake -DPYTHON_LIBRARY="/path/to/libpython2.7.dylib" source_dir
Lastly, on OS X a quick and dirty way (i.e. without recompiling) to change the dynamically linked libraries is install_name_tool -change.