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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def check_version(Cnt, chcklst=['RESPATH','REGPATH','DCM2NIIX','HMUDIR']):
    ''' Check version and existence of all third-party software and input data.
        Output a dictionary with bool type of the requested bits in 'chcklst'
    '''

    # at start, assume that nothing is present yet
    output = {}
    for itm in chcklst:
        output[itm] = False

    # niftyreg reg_resample first
    if 'RESPATH' in chcklst and 'RESPATH' in Cnt:
        try:
            proc = Popen([Cnt['RESPATH'], '--version'], stdout=PIPE)
            out = proc.stdout.read()
            if reg_ver in out:
                output['RESPATH'] = True
        except OSError:
            print 'e> NiftyReg (reg_resample) either is NOT installed or is corrupt.'
    
    # niftyreg reg_aladin
    if 'REGPATH' in chcklst and 'REGPATH' in Cnt:
        try:
            proc = Popen([Cnt['REGPATH'], '--version'], stdout=PIPE)
            out = proc.stdout.read()
            if reg_ver in out:
                output['REGPATH'] = True
        except OSError:
            print 'e> NiftyReg (reg_aladin) either is NOT installed or is corrupt.'

    # dcm2niix
    if 'DCM2NIIX' in chcklst and 'DCM2NIIX' in Cnt:
        try:
            proc = Popen([Cnt['DCM2NIIX'], '-h'], stdout=PIPE)
            out = proc.stdout.read()
            ver_str = re.search('(?<=dcm2niiX version v)\d{1,2}.\d{1,2}.\d*', out)
            if ver_str and dcm_ver in ver_str.group(0):
                output['DCM2NIIX'] = True
        except OSError:
            print 'e> dcm2niix either is NOT installed or is corrupt.'

    # hdw mu-map list
    if 'HMUDIR' in chcklst and 'HMUDIR' in Cnt:
        for hi in Cnt['HMULIST']:
            if os.path.isfile(os.path.join(Cnt['HMUDIR'],hi)):
                output['HMUDIR'] = True
            else:
                output['HMUDIR'] = False
                break

    return output