如何在仅包含数字的文本文件中查找所有单词并将其替换为特定单词

Question

How to find all words (separated with spaces from both sides) in text file which consist only of digits and replace them with a specific word. I do like this if I want to replace a word to a word, but how about digit words? They can consist of different lengths. Thanks.

fin = open("tekstas.txt", "rt")

with open('tekstas.txt') as f:
    if ' ir ' in f.read():
        fout = open("naujasTekstas.txt", "wt")
        for line in fin:
            fout.write(line.replace(' '', ' skaičius '))
            fin.close()
            fout.close()
            f.close()
    else:
        print("Nėra žodžio \"ir\".")

Answer 1

Use regex, most easily available with Python's re module:

import re

text = "word another word 121434"

pattern = '[0-9]+'

print(re.sub(pattern=pattern, repl='replacement', string=text)) # word another word replacement

Link to step by step analysis of this regex: https://regex101.com/r/d7rljs/1