python - Can a unique list accept lower and uppercase entries -

my script logs information unique file types in directory , subdirectory. in process of creating unique list of file extensions current code considers jpg, jpg , jpg same includes 1 of them in list. how can include 3 or more variances?

for root, dirs, files in os.walk(sourcedir, topdown=false):     fl in files:         currentfile=os.path.join(root, fl)         ext=fl[fl.rfind('.')+1:]         if ext!='':             if dirlimiter in currentfile:                 list.append(currentfile)                 directory1=os.path.basename(os.path.normpath(currentfile[:currentfile.rfind(dirlimiter)]))                 directory2=(currentfile[len(sourcedir):currentfile.rfind('\\'+directory1+dirlimiter)])                 directory=directory2+'\\'+directory1                 if directory not in dirlist:                     dircount+=1                     dirlist.append(directory)           if ext not in extlist:           extlist.append(ext) 

the full script in question on stackexchange: recurse through directories , log files file type in python

thanks jennak on further investigation found input in jpg report had jpg , jpg in file below.

> 44;x:\scratch\project\input\foreshore , jetties package > 3\487679 - jetty\img_1630.jpg;3755267 > 45;x:\scratch\project\input\foreshore , jetties package > 3\487679 - jetty\img_1633.jpg;2447135 > 1;x:\scratch\project\input\649701 - hill > close\2263.jpg;405328 2;x:\scratch\project\input\649701 - hill close\2264.jpg;372770 

so first got details of jpg files jpg files , put them in single report more convenient having 2 reports. guess programmed better thought :-)

no, list, in operator checks equality, , strings equal 1 when use same case.

you use set here, , store directory.lower() values in it. sets (a lot) faster membership testing lists well:

directories = set() extensions = set()  root, dirs, files in os.walk(sourcedir, topdown=false):     # ...         # no need use `directory.lower() in directories`, update set:         directories.add(directory.lower())      # ...     extensions.add(ext.lower()) 

the dircount variable derived later on:

dircount = len(directories) 

you want functions provided os.path more, in particular os.path.splitext(), os.path.relpath() , os.path.join() functions.

your file handling in loop can simplified lot; a:

for fl in files:     filename = os.path.join(root, fl)     base, ext = os.path.splitext(filename)     if ext:        list.append(filename)        directory = os.path.relpath(filename, sourcedir)        directories.add(directory.lower())        extensions.add(ext) 

note use just os.path.relpath() here; os.path.basename() , os.path.normpath() dance plus delimiters, etc. needlessly complicated.

now, reading between lines, seems want consider extensions equal whatever case of just part.

in case, build new filename result of os.path.splitext():

base, ext = os.path.splitext(filename) normalized_filename = base + ext.lower() 

now normalized_filename filename extension lowered, can use value in sets needed.