I guess something like this should do it. It basically writes the content to a new file and replaces the old file with the new file:
from tempfile import mkstemp from shutil import move, copymode from os import fdopen, remove def replace(file_path, pattern, subst): #Create temp file fh, abs_path = mkstemp() with fdopen(fh,'w') as new_file: with open(file_path) as old_file: for line in old_file: new_file.write(line.replace(pattern, subst)) #Copy the file permissions from the old file to the new file copymode(file_path, abs_path) #Remove original file remove(file_path) #Move new file move(abs_path, file_path)
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