s="""Paragraph 1 some text blah blah blah blah UNWANTED TEXT some text Paragraph END UNWNTED TEXT Paragraph 2 some text blah blah blah blah UNWNTED TEXT Paragraph END"""
Now python code to re.sub to replace UNWANTED TEXT only inside paragraphs keep UNWANTED TEXT Outside paragraphs
search_unwanted_only_inparagrap = re.findall('(?s)(?<=Paragraph)(.*?)(?=END)', text_file, flags = re.MULTILINE )
if search_unwanted_only_inparagrap:
replace_only_insidepara = re.sub(r"UNWANTED TEXT+", " ", text_file) #replace string substitue
print (replace_only_insidepara)
else:
print ("not found")
But the output replace all instance of UNWANTED TEXT in through out the file
Paragraph 1 some text blah blah blah blah some text Paragraph END Paragraph 2 some text blah blah blah blah Paragraph END
but i expect like this
Paragraph 1 some text blah blah blah blah some text Paragraph END UNWNTED TEXT Paragraph 2 some text blah blah blah blah Paragraph END
Please help.
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Answer
Your demo input should have been more ‘minimal’. However, I tried to understand your requirement and I tried re.split works:
import re
s = """Paragraph 1
some text blah blah
blah blah
UNWANTED TEXT
some text
Paragraph END
UNWANTED TEXT
Paragraph 2
some text blah blah
blah blah
UNWANTED TEXT
Paragraph END"""
reg_para = re.compile(r'(Paragraphs+d+.+?END)', re.DOTALL)
paras = reg_para.split(s)
for para in paras:
if reg_para.match(para):
para = re.sub(r"UNWANTED TEXT", " ", para)
# in case you want replace more words:
# of course you can use list of keywords some loops
para = re.sub(r"Another WORD", " ", para)
print(para)
else:
print(para)
Output:
Paragraph 1 some text blah blah blah blah some text Paragraph END UNWANTED TEXT Paragraph 2 some text blah blah blah blah Paragraph END