python replace part in large file
for file in files:
fname = os.path.join(dir, file)
inFile = codecs.open(fname, "r", "utf-8")
outFile = codecs.open(fname + ".new", "w", "utf-8")
for line in inFile:
newline = do_replacements_on(line)
outFile.write(newline)
inFile.close()
outFile.close()
os.rename(fname + ".new", fname)python replace text in file
filename = "sample1.txt"
# SAMPLE1.TXT
# Hello World!
# I am a human.
with open(filename, 'r+') as f:
text = f.read()
text = re.sub('human', 'cat', text)
f.seek(0)
f.write(text)
f.truncate()
# SAMPLE1.TXT
# Hello World!
# I am a cat.Copyright © 2021 Codeinu
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