By Noah Gift, Jeremy Jones
Python is a perfect language for fixing difficulties, particularly in Linux and Unix networks. With this pragmatic booklet, directors can assessment numerous projects that frequently happen within the administration of those structures, and learn the way Python delivers a extra effective and no more painful option to deal with them.
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Additional resources for Python for Unix and Linux System Administration [Noah Gift] (2009)
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Since you are reading this book, we assume you have attained some level of familiarity over the Unix shell. If that is the case, then gaining some level of mastery over IPython will be easy. One of the reasons that it is unclear what you should do when you first see the IPython prompt, is that what you can do is virtually unlimited. So it is more appropriate to think in terms of what you want to do. All of the features of the Python language are available to you from within the IPython prompt. Plus, there are a number of IPython “magic” functions available to you.
1Gi 96% / 0Bi 100% /dev 0Bi 100% /dev 0Bi 100% /net 0Bi 100% /home 193Gi 36% /Volumes/Backup 225Gi 52% /Volumes/EditingDrive Now we get the exact same output that we get from script that doesn’t contain functions. If you are puzzled, this is a good sign. To see the reason we get the same exact output, we just need to look at the source code. If you are following along at home, open up another terminal tab or window and look at the script pysysinfo_func: #Main function that call other functions def main(): uname_func() disk_func() main() The problem is that main function we created at the end of the last chapter is coming back to bite us.
Page [options] OBJECT If no object is given, use _ (last output). Options: -r: page str(object), don't pretty-print it. And here is one final piece of IPython help that is great for generating a summary of the way things work, as well as a summary of the magic functions themselves. , obj?? obj). : List names in 'foo' containing 'abc' in them. : Information about IPython's 'magic' % functions. Magic functions are prefixed by %, and typically take their arguments without parentheses, quotes or even commas for convenience.