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Search for regular expression and replace
String Handling example from a Well House Consultants training course
More on String Handling [link]
Source code: inflate Module: Y108
""" Search and replace in Python using regular expressions;
this example shows replacement of a matched string by a literal string, by a string that's replaced by a new string that contains elements of the original one, and by a string that's generated by a piece of code run on the elements that matched. """ import re digits = re.compile(r'(\d+)') cost = "It will cost 15 to 20 euros" # Replace one string by a literal string highprice = digits.sub("99",cost) print(highprice) # Replace one string by a modification thereof highprice = digits.sub(r'** {\1} **',cost) print(highprice) # Replace one string by a calculation def action(val): newval = "%d" % (int(val.group()) + 7) return newval highprice = digits.sub(action,cost) print(highprice) """ An example of this code running: WomanWithCat:y108 grahamellis$ python2 inflate It will cost 99 to 99 euros It will cost ** {15} ** to ** {20} ** euros It will cost 22 to 27 euros WomanWithCat:y108 grahamellis$ python3 inflate It will cost 99 to 99 euros It will cost ** {15} ** to ** {20} ** euros It will cost 22 to 27 euros WomanWithCat:y108 grahamellis$ """ Learn about this subject
This module and example are covered on the following public courses:
* Learning to program in Python * Python Programming * Intermediate Python Also available on on site courses for larger groups Books covering this topic
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