Compile python extensions error

Python – Compile Cython Extensions Error – Pycharm IDE

Please help me resolve this error of trying to install Cython in PyCharm.

Best Solution

JetBrains has provided an answer:

For Python 2.7: sudo apt-get install python-dev

For Python 3.5: sudo apt-get install python3-dev

For Python 3.6: sudo apt-get install python3.6-dev

For Python 3.7: sudo apt-get install python3.7-dev

Related Solutions

Python – How to use Cython to compile Python 3 into C

Check the documentation. It’s not enough to do gcc x.c -o x .

There’s a lot more to it, but a direct answer is:

Compiling your .c files will vary depending on your operating system. Python documentation for writing extension modules should have some details for your system. Here we give an example on a Linux system:

$ gcc -shared -pthread -fPIC -fwrapv -O2 -Wall -fno-strict-aliasing -I/usr/include/python2.7 -o yourmod.so yourmod.c

Of course in your situation it’s going to be something closer to -I/usr/include/python3.4 , or even $(pkg-config —libs —cflags python3) . And you’re not building with -shared , because you want an executable.

Shortest «this has to work» set of commands is:

cython3 --embed greet.py -o greet.c gcc $(pkg-config --libs --cflags python3) greet.c -o greet 

You need to install pkg-config if it’s missing.

Python – How to install GNU MPFR library on pythonanywhere

The gmpy2 is written in C and depends on three other C libraries: GMP, MPFR, and MPC. The easiest way to ensure all the dependencies are present is to «libmpc-dev» using the standard package management tools from your Linux distribution. For example:

sudo apt-get install libmpc-dev 

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How to fix compile cython extensions error — pycharm ide in Python?

The Compile Cython Extensions Error in PyCharm IDE is a common issue faced by developers while working with Cython extension modules. This error occurs when the PyCharm IDE is unable to compile the Cython code into a usable Python module. This can be due to various reasons such as incorrect setup of Cython, missing dependencies or other configuration issues. If you’re facing this issue, don’t worry as there are a few solutions that can help you resolve it. Here are a few methods that you can try to fix the Compile Cython Extensions Error in PyCharm IDE.

Method 1: Installing Cython

To fix the «Compile Cython Extensions Error» in Pycharm IDE, you can install Cython using the following steps:

Step 1: Install Cython

To install Cython, run the following command in your terminal or command prompt:

Step 2: Convert your .pyx file to a .c file

To convert your .pyx file to a .c file, run the following command in your terminal or command prompt:

cython my_module.pyx --embed

Step 3: Compile the .c file

To compile the .c file, run the following command in your terminal or command prompt:

gcc -Os -I /usr/include/python3.6m -o my_module my_module.c -lpython3.6m -lpthread -lm -lutil -ldl

Step 4: Add the compiled module to your project

To add the compiled module to your project, import it in your Python code using the following statement:

That’s it! You have successfully fixed the «Compile Cython Extensions Error» in Pycharm IDE by installing Cython and compiling your .pyx file.

Method 2: Configuring PyCharm for Cython

To fix the «Compile Cython Extensions Error» in PyCharm IDE, you can follow these steps:

Step 1: Install Cython

First, you need to install Cython. You can install it using pip:

Step 2: Configure PyCharm for Cython

1. Open your PyCharm project.
2. Click on «File» > «Settings».
3. In the left panel, select «Project» > «Project Interpreter».
4. Click on the «+» button to add a new interpreter.
5. Select «Virtualenv Environment» and click on «OK».
6. Choose the Python interpreter you want to use and click on «OK».
7. In the left panel, select «Tools» > «Python Integrated Tools».
8. Check the box next to «Cython» and click on «OK».

Step 3: Use Cython in your project

To use Cython in your project, you need to create a «.pyx» file and then compile it to a «.c» file using the Cython compiler. Here’s an example:

def add_numbers(int a, int b): return a + b

from distutils.core import setup from Cython.Build import cythonize setup( ext_modules=cythonize("example.pyx") )

To compile the «.pyx» file to a «.c» file, run the following command in your terminal:

python setup.py build_ext --inplace

This will create a «.c» file in the same directory as the «.pyx» file. You can then import the module in your Python code:

import example print(example.add_numbers(1, 2))

That’s it! You have successfully configured PyCharm for Cython and compiled a Cython extension.

Method 3: Check for Missing Dependencies

To fix the «Compile Cython Extensions Error» in PyCharm IDE, you can use the «Check for Missing Dependencies» feature. This feature checks for missing dependencies and installs them automatically. Here are the steps to use this feature:

1. Open your PyCharm project and go to «File» -> «Settings» -> «Project» -> «Project Interpreter».
2. Click on the gear icon and select «Show All».
3. Look for the package that is causing the error and click on it.
4. Click on the «Check for Missing Dependencies» button.
5. PyCharm will then search for the missing dependencies and install them automatically.

Here is an example code that demonstrates how to use this feature:

import cython @cython.cclass class Example: def __init__(self, x): self.x = x def add(self, y): return self.x + y ex = Example(10) print(ex.add(5))

In this example, we import the «cython» package and define a class called «Example» using the «@cython.cclass» decorator. We then define a method called «add» that adds a value to the «x» attribute of the class. Finally, we create an instance of the class and call the «add» method.

If you encounter the «Compile Cython Extensions Error» while running this code in PyCharm, you can use the «Check for Missing Dependencies» feature to fix it.

Method 4: Updating PyCharm and Cython to Latest Versions

If you encounter the «Compile Cython Extensions Error» in PyCharm IDE, updating PyCharm and Cython to their latest versions can help solve the issue.

Step 1: Update PyCharm

To update PyCharm, follow these steps:

1. Open PyCharm IDE.
2. Click on «Help» in the menu bar.
3. Select «Check for Updates».
4. If an update is available, follow the prompts to download and install it.

Step 2: Update Cython

To update Cython, follow these steps:

1. Open a terminal or command prompt.
2. Type the following command and press enter:

pip install --upgrade cython

Step 3: Compile Cython Extensions

Once you have updated PyCharm and Cython, you can compile Cython extensions by following these steps:

1. Open the Cython file you want to compile in PyCharm.
2. Click on «Run» in the menu bar.
3. Select «Edit Configurations».
4. In the «Script path» field, enter the path to your Cython file.
5. In the «Parameters» field, enter the following:

Here is an example of compiling a simple Cython file named «example.pyx»:

 def add_numbers(int a, int b): return a + b

To compile this file, follow the steps above and enter the following in the «Parameters» field:

build_ext --inplace example.pyx

This will compile the «example.pyx» file and create a shared library named «example.so» in the same directory.

That’s it! Updating PyCharm and Cython to their latest versions can help solve the «Compile Cython Extensions Error» in PyCharm IDE.

Method 5: Re-install PyCharm or Cython

If you are facing «Compile Cython Extensions Error» in PyCharm IDE, one of the solutions is to re-install either PyCharm or Cython. Here is how you can do it:

Re-installing PyCharm

Step 1: Uninstall the current version of PyCharm from your system.

Step 2: Download the latest version of PyCharm from the official website.

Step 3: Install the downloaded PyCharm version on your system.

Re-installing Cython

Step 1: Uninstall the current version of Cython from your system.

Step 2: Install pip (if not already installed) by running the following command in the terminal:

python -m ensurepip --default-pip

Step 3: Install Cython using pip by running the following command in the terminal:

Step 4: Verify the installation by running the following command in the terminal:

This should display the version of Cython installed on your system.

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Could not build python extensions #725

Could not build python extensions #725

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Hi, I’m running Ubuntu 16.04 with Anaconda 3. When I’m trying to configure Essentia, the following error appears:

./waf configure --build-static --with-python --with-cpptests --with-examples --with-vamp Setting top to : /home/xxx/Repositories/essentia Setting out to : /home/xxx/Repositories/essentia/build → configuring the project in /home/xxx/Repositories/essentia → Building in release mode Checking for 'g++' (C++ compiler) : /usr/bin/g++ Checking for 'gcc' (C compiler) : /usr/bin/gcc Checking for program 'pkg-config' : /usr/bin/pkg-config Checking for 'libavcodec' >= 55.34.1 : yes Checking for 'libavformat' : yes Checking for 'libavutil' : yes Checking for 'libavresample' : yes Checking for 'samplerate' : yes Checking for 'taglib' >= 1.9 : yes Checking for 'yaml-0.1' : yes Checking for 'fftw3f' : yes Checking for 'libchromaprint' : yes Checking for 'gcc' (C compiler) : /usr/bin/gcc Checking for program 'python' : /home/shared/anaconda3/bin/python Checking for python version >= 2.7.0 : 3.6.4 → Configuring for python3 python-config : /home/shared/anaconda3/bin/python3.6-config Asking python-config for pyext '--cflags --libs --ldflags' flags : yes Testing pyext configuration : Could not build python extensions The configuration failed (complete log in /home/xxx/Repositories/essentia/build/config.log) 

When I inspect the above file this is what I see

Testing pyext configuration ==> #include #ifdef __cplusplus extern "C" < #endif void Py_Initialize(void); void Py_Finalize(void); #ifdef __cplusplus >#endif int main(int argc, char **argv) < (void)argc; (void)argv; Py_Initialize(); Py_Finalize(); return 0; > task in 'testprog' failed with exit status 1 (run with -v to display more information) Could not build python extensions from /home/xxx/Repositories/essentia/src/python: The configuration failed 

I checked the gcc and g++ versions and this is what I see

gcc --version gcc (Ubuntu 6.4.0-17ubuntu1~16.04) 6.4.0 20180424 Copyright (C) 2017 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. g++ --version g++ (Ubuntu 6.4.0-17ubuntu1~16.04) 6.4.0 20180424 Copyright (C) 2017 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 

The text was updated successfully, but these errors were encountered:

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