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FindMissingFileNumbersOptimized_10000.py

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#! /usr/bin/env/python

import mmap

import re

#-------------------------------------------------------------------------------------------

# Main Function

#-------------------------------------------------------------------------------------------

def main():

filePath = input("Enter file path: ")

endFileNum = input("Enter end file number: ")

filesMissingCount = 0

filesPresentCount = 0

fileNumbersMissing = set()

filesNumbersPresent = set()

fileNamesPresent = set()

#>>> myRegex=r'(.*)file_(.)' + re.escape(str(TEXTTO)) + r'\.txt'

#>>> searchObj=re.search(myRegex,line)

#>>> print(searchObj)

#<_sre.SRE_Match object; span=(0, 15), match='asdffile__0.txt'>

# https://stackoverflow.com/questions/46476537/python-how-to-search-a-string-in-a-large-file

#my_regex = re.compile('.*file_.(\d+)\.txt.*')

my_regex = re.compile('.*file(\d+)\.txt.*')

for line in open(filePath):

match = my_regex.search(line)

if match:

filesNumbersPresent.add(int(match.group(1)))

#start = line.find('file_')

start = line.find('file')

end = line.find('txt', start)

fileNamesPresent.add(line[start:end+3])

for x in range(int(endFileNum)):

if x not in filesNumbersPresent:

fileNumbersMissing.add(x)

filesMissingCount += 1

else:

filesPresentCount += 1

print("Files Present: ")

#print(fileNamesPresent)

#print(filesNumbersPresent)

print("Files Present Count: %d" % filesPresentCount)

print("Files Missing: ")

print(fileNumbersMissing)

print("Files Missing Count: %d" % filesMissingCount)

#-------------------------------------------------------------------------------------------

# Start Main

#-------------------------------------------------------------------------------------------

if __name__ == "__main__":

main()