The first step is to see what modules are available the Applications Streams (appstream) repo: Hello, Red Hat Developer World from Python 3.6 Then, make the program executable, and run it: #!/usr/bin/python3.6 import sys version = "Python %d.%d" % (sys.version_info.major, sys.version_info.minor) print("Hello, Red Hat Developer World from",version) Using a text editor such as vi, nano, or gedit, create a file named `hello.py` with the following content: Let’s create a simple Python program that can be run from the command line. At some point the expectation about what version of Python you get without specifying a version will be wrong.
While you can install a package which will make `/usr/bin/python` give your choice of Python 3 or Python 2, it isn’t recommended. This avoids surprises and is a best practice. It is strongly suggested to use a specific version such as `python3` or better, `python3.6`. Note: by default there is no `/usr/bin/python` without a version number. $ yum list installed python\* # list installed packages matching python* $ python3 -m pip list # installed modules $ rpm -qil python36 # get the info and list of files in the python36 meta package $ ls /usr/bin/py* /usr/bin/pip3* # see what’s in /usr/bin More info about what is installed on your system is available with the following commands: This helps avoid conflicts and other surprises if you have multiple versions of Python installed. There are wrapper scripts in `/usr/bin` to run these, but running them as modules without using the wrapper script is strongly recommended. The Python modules `pip` and `venv` for installing modules and working with Python virtual environments are installed.
You can also use `python3.6` as the command to specifically run Python 3.6. For an explanation of the above command, see Working with AppStreams below. This causes the `python36-devel` package to be installed that are needed to build any Python module that use dynamically loaded code such as C/C++. For development, use the `build` profile. Python36 3.6 build, default Python programming language, version 3.6įor the `python36` module, there are two profiles: `default` and `build`. Python27 2.7 default Python programming language, version 2.7
First, see what Python modules are available as part of the Application Stream Repository:
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