Checks if sequence exist on disk. seqPath = image sequence path example: J:/Footages/33x01_02a/33x01_02a.%04d.sgi where %04d can be any sequence like 0001-0265, 231-689 but not KFd001- KFd567 string change buildPath at line 21 to customize for compatibility frstFrame = First frame as string lastFrame = Last frame as string

sequenceExists.py

import os

def sequenceExists(seqPath, firstFrame, lastFrame, sep=None):

    """ Checks if sequence exist on disk.
           seqPath (string): image sequence path

               example: J:/Footages/33x01_02a/33x01_02a.%04d.sgi
               where %04d can be any sequence like 0001-0265, 231-689  but not KFd001- KFd567 string
               change buildPath at line 21 to customize for compatibility

           frstFrame (string): First frame as string
           lastFrame (string): Last frame as string
    """
    builPath = ""
    fnSep = sep or "."
    
    seqPathLst = seqPath.split(fnSep)
    frmNumLen = len(firstFrame)
    for each in range(int(firstFrame),int(lastFrame)+1):
        newLen = frmNumLen - len(str(each))
        numFmt =  newLen* "0" + str(each)
        buildPath = seqPathLst[0] + fnSep + numFmt + fnSep + seqPathLst[-1]
        if not os.path.exists(buildPath):
            return False
    return True