Easiest way to replace a string using a dictionary of replacements?

by

Using re:

import re

s="Спорт not russianA"
d = {
'Спорт':'Досуг',
'russianA':'englishA'
}

pattern = re.compile(r'\b(' + '|'.join(d.keys()) + r')\b')
result = pattern.sub(lambda x: d[x.group()], s)
# Output: 'Досуг not englishA'

This will match whole words only. If you don’t need that, use the pattern:

pattern = re.compile('|'.join(d.keys()))

Note that in this case you should sort the words descending by length if some of your dictionary entries are substrings of others.

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