How to replace one substring in multiple strings in Python?

Question

Let's say I have multiple strings:

string1 = "ab"
string2 = "db"
string3 = "eb"

How do I replace the same substring in all of them? Let's say I need to replace"b" with "c". I can sure do the following, but is there a neat one-line solution?

string1 = string1.replace("b", "c")
string2 = string2.replace("b", "c")
string3 = string3.replace("b", "c")

sounds to me like you want to store your strings in a data structure like a list rather than keeping them all as individual variables; then you can just do strings = [string.replace("b", "c') for string in strings] — Hamms
– Hamms, Commented Sep 7, 2017 at 23:41

whackamadoodle3000 · Accepted Answer · 2017-09-07 23:43:46Z

3

string1,string2,string3=[string.replace('b','c') for string in [string1,string2,string3]]

Try this neat list comprehension one-liner

answered Sep 7, 2017 at 23:43

whackamadoodle3000

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Ajax1234 · Accepted Answer · 2017-09-07 23:59:56Z

1

You can use a class and create classmethods in list comprehension:

class String:
   def __init__(self, s):
       self.s = s
   def replace(self, old, new):
      return self.s.replace(old, new)


string1 = "ab"
string2 = "db"
string3 = "eb"
l = [String(i).replace("b", "c") for i in [string1, string2, string3]]

Output:

['ac', 'dc', 'ec']

answered Sep 7, 2017 at 23:59

Ajax1234

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1 Comment

kaza Over a year ago

what is advantage of using class in this example?

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