For 2023 (and 2024 ...) - we are now fully retired from IT training. We have made many, many friends over 25 years of teaching about Python, Tcl, Perl, PHP, Lua, Java, C and C++ - and MySQL, Linux and Solaris/SunOS too. Our training notes are now very much out of date, but due to upward compatability most of our examples remain operational and even relevant ad you are welcome to make us if them "as seen" and at your own risk.
Lisa and I (Graham) now live in what was our training centre in Melksham - happy to meet with former delegates here - but do check ahead before coming round. We are far from inactive - rather, enjoying the times that we are retired but still healthy enough in mind and body to be active!
I am also active in many other area and still look after a lot of web sites - you can find an index ((here)) |
Integer v float - Python
If you had f failures in s samples, what proportion failed? .6666666666 you might correctly say - but Python might not come up with that answer if you have two integer counts
>>> s = 6
>>> f = 4
And that gives:
>>> f/s
0
Will that be better if we turn it into percentages?
>>> f*100/s
66
Yes - somewhat better but still inaccurate - the real solution is to convert one of the operands into a float:
>>> f*100/float(s)
66.666666666666671 (written 2007-11-12)
Associated topics are indexed as below, or enter http://melksh.am/nnnn for individual articles Y102 - Python - Fundamentals [328] Making programs easy for any user to start - (2005-05-29) [633] Copying a reference, or cloning - (2006-03-05) [748] Getting rid of variables after you have finished with them - (2006-06-06) [956] Python security - trouble with input - (2006-11-30) [1448] Question on division (Java) - Also Perl, PHP, Python ... - (2007-11-28) [1461] Python - input v raw input - (2007-12-06) [1878] Pascals Triangle in Python and Java - (2008-11-10) [2368] Python - fresh examples of all the fundamentals - (2009-08-20) [2442] Variable storage - Perl, Tcl and Python compared - (2009-10-08) [2778] Learning to program in Python 2 ... and / or in Python 3 - (2010-05-24) [3083] Python - fresh examples from recent courses - (2010-12-11) [3181] Beware - a=a+b and a+=b are different - Python - (2011-02-23) [3278] Do I need to initialise variables - programming in C, C++, Perl, PHP, Python, Ruby or Java. - (2011-05-05) [3551] Some terms used in programming (Biased towards Python) - (2011-12-12) [3886] Formatting output - why we need to, and first Python example - (2012-10-09) [3917] BODMAS - the order a computer evaluates arithmetic expressions - (2012-11-09) [4324] Learning to program - variables and constants - (2014-11-22) [4442] Mutable v Immuatble objects in Python, and the implication - (2015-02-24) [4712] A reminder of the key issues to consider in moving from Python 2 to Python 3 - (2016-10-30)
Some other Articles
Market survey - to learn, to prove a point, or to sell your product?Linux, PHP, Tcl, Ruby, C, C++ - last minute training course availabilityWiltshire County Council - Budget ConsultationGetting the community on line - some basicsInteger v float - PythonRemembrance day - inside a church and inside the dayTravel Across Wiltshire - the gameArrays in Tcl - a demonstrationBuffering up in Tcl - the empty coke can comparisonMelksham v Ely
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This is a page archived from The Horse's Mouth at
http://www.wellho.net/horse/ -
the diary and writings of Graham Ellis.
Every attempt was made to provide current information at the time the
page was written, but things do move forward in our business - new software
releases, price changes, new techniques. Please check back via
our main site for current courses,
prices, versions, etc - any mention of a price in "The Horse's Mouth"
cannot be taken as an offer to supply at that price.
Link to Ezine home page (for reading).
Link to Blogging home page (to add comments).
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