Install_requires must be a string or list of strings – Fix Qiskit Terra installation

David Peter — Wed, 30 Aug 2023 12:12:32 +0000

Issue: I got this error – “error in qiskit-terra setup command: ‘install_requires’ must be a string or list of strings containing valid project/version requirement specifiers; Expected end or semicolon (after version specifier)” while installing Qiskit Terra in an Anaconda python environment on CentOS. Here’s the complete error message: $ pip...

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pip freeze returns an error: Permission denied: hg

Ramya Santhosh — Thu, 07 Jan 2021 10:10:18 +0000

Used pip install -e to install a python package. As I saw lot of sympy deprecation warning in the logs, I used pip freeze to list all the packages installed on the system and its version information. However, pip freeze throwed few more errors. #pip freeze ... File "/usr/share/httpd/.conda/envs/apache_iisc_dm/lib/python3.9/site-packages/pip/_internal/vcs/versioncontrol.py", line...

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ModuleNotFoundError: No module named ‘IPython’ [Fix]

Ramya Santhosh — Sun, 17 May 2020 11:28:51 +0000

Question: I got this error “No module named IPython” while executing a Python program. The complete error message is below. Any idea of how to fix the same? $ python san.py Traceback (most recent call last): File "san.py", line 2, in <module> from IPython import get_ipython ModuleNotFoundError: No module named...

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No module named Cython and Running cythonize failed [Fix]

Ramya Santhosh — Thu, 14 May 2020 12:10:29 +0000

I have been using Websockify to allow the browser to connect to any application or service on a Linux machine. This involves setting up Websockify server that translates the WebSockets to the normal socket and enables the traffic to follow between the client and the server. Installation of Websockify is...

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Cannot compile Python.h – Websockify installation Error

Ramya Santhosh — Thu, 14 May 2020 07:04:20 +0000

Question: While installing Websockify, I encountered the error: SystemError: Cannot compile Python.h. Below is the complete error #python3.6 setup.py install [...] SystemError: Cannot compile 'Python.h'. Perhaps you need to install python-dev|python-devel. Note: As there was no yum repository that provided Websockify binary for PPC64LE (including the remi repository), I had...

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Create virtual environment for different Python versions using Conda

Ramya Santhosh — Wed, 28 Aug 2019 01:15:49 +0000

In our earlier article, we had shown how to install multiple versions of python without breaking System tools and Create an Isolated environment using Virtualenv?. Here’s an another method to create virtual environment for different versions of Python – using Conda. Conda is an open-source package management system and environment management...

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How to fix Python Installation Error while loading shared libraries: libssl.so.1.0.0? [Solved]

David Peter — Thu, 28 Jan 2016 21:08:04 +0000

Question: Thanks to the guide on How to compile and install Python with OpenSSL Support. However, the installation failed with an error message error while loading shared libraries: libssl.so.1.0.0 cannot open shared object file during make. According to the installation guide, I installed OpenSSL and then edited Setup.dist file to refer the OpenSSL...

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Python Error – urllib2 URLError: urlopen error unknown url type: https [Solved]

David Peter — Wed, 27 Jan 2016 21:00:26 +0000

Question: I got this error urllib2.URLError: <urlopen error unknown url type: https> while installing packstack. After checking the program, I understood that the script is importing urllib library and uses urlretrieve function to fetch a file from https URL and it seems like the function is not able to fetch data from https URL. So I decided...

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How to Install Multiple Versions of Python (2.7 and 3.5) Without breaking System tools and Create Isolated environment using Virtualenv?

David Peter — Thu, 21 Jan 2016 23:43:04 +0000

Today, I’m going to tell you how to install Python 2.7 and 3.5 versions on CentOS 6.4. And we are going to do this without breaking the existing Python installation (the default system installed version is 2.6.6 on CentOS 6.4) and other system tools such as yum. Well, the main...

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How to Solve ImportError: No module named ConfigParser?

David Peter — Fri, 08 Jan 2016 21:30:01 +0000

Question: I was stuck with an error ImportError: No module named ConfigParser when I run packstack command in CentOS. Below is the complete error message: $packstack --gen-answer-file=answers.txt Traceback (most recent call last): File "/usr/local/bin/packstack", line 4, in <module> __import__('pkg_resources').run_script('packstack==7.0.0', 'packstack') import ConfigParser ImportError: No module named 'ConfigParser' Can you tell me how to...

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