Home Accessibility Courses Twitter The Mouth Facebook Resources Site Map About Us Contact
Python formatting update - including named completions

As from Python 2.6, a format method has been introduced in addtion to the % operator on strings to provide a more flexible and improved way of convering objects (of various type) into strings. Select [here] to open the source in a new window which was used to get this result:

  munchkin:cambx grahamellis$ python3 earlier 
  How all are ya (in metres) 1.76
  How heavy are ya (in kgs) 74
  Your bmi is 23.889 if so
  Your bmi is 000023.889 if so
  Your bmi is     23.889 if so
  Your bmi is 23.889     if so
  Your bmi is   23.889   if so
  Your bmi is     23.889 if so
  Your bmi is 23.889462809917354 if so
  for height 1.76 and weight 74.0 the bmi is     23.889
  for height 1.76 and weight 74.0 the bmi is     23.889
  for height 1.76 and weight 74.0 the bmi is     23.889
  munchkin:cambx grahamellis$


This new format method on a string is what we recommend you use in Python 3 ... it has a much inreased flexibility, and indeed allows you to write much cleaner code too - for example by filling in format elements by name:

  print ("Your bmi is {result} if so".format(result=bmi))

or indeed

  result = {"height":h, "weight":w, "bmi":bmi}
  print ("for height {height} and weight {weight} the bmi is {bmi:10.3f}".format(**result))

(written 2015-12-10, updated 2015-12-09)

 
Associated topics are indexed as below, or enter http://melksh.am/nnnn for individual articles
Y108 - Python - String Handling
  [4659] Prining a pound sign from Python AND running from the command line at the same time - (2016-03-03)
  [4593] Command line parameter handling in Python via the argparse module - (2015-12-08)
  [4360] Python - comparison of old and new string formatters - (2014-12-22)
  [4307] Identifying and clearing denial of service attacks on your Apache server - (2014-09-27)
  [4213] Formatting options in Python - (2013-11-16)
  [4152] Why are bus fares so high? - (2013-08-18)
  [4027] Collections in Python - list tuple dict and string. - (2013-03-04)
  [3886] Formatting output - why we need to, and first Python example - (2012-10-09)
  [3796] Backquote, backtic, str and repr in Python - conversion object to string - (2012-07-05)
  [3469] Teaching dilemma - old tricks and techniques, or recent enhancements? - (2011-10-08)
  [3468] Python string formatting - the move from % to str.format - (2011-10-08)
  [3349] Formatting output in Python through str.format - (2011-07-07)
  [3218] Matching a license plate or product code - Regular Expressions - (2011-03-28)
  [3090] Matching to a string - what if it matches in many possible ways? - (2010-12-17)
  [2814] Python - splitting and joining strings - (2010-06-16)
  [2780] Formatted Printing in Python - (2010-05-25)
  [2765] Running operating system commands from your Python program - (2010-05-14)
  [2721] Regular Expressions in Python - (2010-04-14)
  [2692] Flexible search and replace in Python - (2010-03-25)
  [2406] Pound Sign in Python Program - (2009-09-15)
  [2284] Strings as collections in Python - (2009-07-12)
  [1876] Python Regular Expressions - (2008-11-08)
  [1608] Underlining in Perl and Python - the x and * operator in use - (2008-04-12)
  [1517] Python - formatting objects - (2008-01-24)
  [1195] Regular Express Primer - (2007-05-20)
  [1110] Python - two different splits - (2007-03-15)
  [970] String duplication - x in Perl, * in Python and Ruby - (2006-12-07)
  [954] Splitting Pythons in Bradford - (2006-11-29)
  [943] Matching within multiline strings, and ignoring case in regular expressions - (2006-11-25)
  [903] Pieces of Python - (2006-10-23)
  [773] Breaking bread - (2006-06-22)
  [560] The fencepost problem - (2006-01-10)
  [496] Python printf - (2005-11-15)
  [463] Splitting the difference - (2005-10-13)
  [324] The backtick operator in Python and Perl - (2005-05-25)


Back to
XML handling in Python - a new teaching example using etree
Previous and next
or
Horse's mouth home
Forward to
Call for help counting passengers - TransWilts, 12th to 14th December
Some other Articles
Happy Christmas - and a Christmas thought
21 places to get your train and bus timetables for TransWilts
Not standing as your local councillor
Call for help counting passengers - TransWilts, 12th to 14th December
Python formatting update - including named completions
XML handling in Python - a new teaching example using etree
A comparison of the public transport alternatives to the Royal United Hospital, Bath - from Melksham.
From single block to structure and object oriented programming
Progress on moving from Python 2 to Python 3 - training for both versions
4728 posts, page by page
Link to page ... 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95 at 50 posts per page


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).

You can Add a comment or ranking to this page

© WELL HOUSE CONSULTANTS LTD., 2017: 404 The Spa • Melksham, Wiltshire • United Kingdom • SN12 6QL
PH: 01144 1225 708225 • EMAIL: info@wellho.net • WEB: http://www.wellho.net • SKYPE: wellho

PAGE: http://www.wellho.net/mouth/4595_Pyt ... tions.html • PAGE BUILT: Sat May 27 16:49:10 2017 • BUILD SYSTEM: WomanWithCat