Using script to list .lyr files with broken links?

Question

I would like to identify within a particular folder the .lyr files that have broken links. Some of these files are within multiple folders but all fall within one folder. My programming knowledge is fairly novice so I may use confusing or incorrect terminology.

I have been following the Q&A below, and have got the script to successfully identify .mxd's in a test folder only containing one .mxd file containing a broken .lyr file. When trying the .lyr script given in the same thread on a test folder containing a broken .lyr file both IDLE and Arc Desktop (10.2) crash.

Use arcpy.mapping to list broken data layers?

successful broken .lyr in mxd script:

import arcpy, os
path = r"M_XXX"
for root, dirs, files in os.walk(path):
    for fileName in files:
        basename, extension = os.path.splitext(fileName)
        if extension == ".mxd":
            fullPath = os.path.join(root, fileName)
            mxd = arcpy.mapping.MapDocument(fullPath)
            brknList = arcpy.mapping.ListBrokenDataSources(mxd)
            for brknItem in brknList:
                print "MXD: " + fullPath
                print "\t" + brknItem.name

crash .lyr script:

import arcpy, os
path = r"M_XXX"
for root, dirs, files in os.walk(path):
    for fileName in files:
        basename, extension = os.path.splitext(fileName)
        if extension == ".lyr":
            fullPath = os.path.join(root, fileName)
            mxd = arcpy.mapping.MapDocument(fullPath)
            brknList = arcpy.mapping.ListBrokenDataSources(mxd)
            for brknItem in brknList:
                print "LYR: " + fullPath
                print "\t" + brknItem.name

Answer 1

Use a describe object to identify a layer's feature class. Then use Exists to determine if the feature class exists. If it doesn't the link will be broken.

import arcpy, os
path = r"M_XXX"
for root, dirs, files in os.walk(path):
    for fileName in files:
        basename, extension = os.path.splitext(fileName)
        if extension == ".lyr":
            fil = os.path.join (root, fileName)
            desc = arcpy.Describe (fil)
            fc = desc.featureClass.catalogPath
            if not arcpy.Exists (fc):
                print "broken:"
                print fil