[SOLVED] os.path.isdir returns false when folder exists?

os.path.isdir returns false when folder exists?

I have the following code which checks if the directory exists

def download(id, name, bar):
    cwd = os.getcwd()
    dir = os.path.join(cwd,bar)
    partial = os.path.join(cwd, id + ".partial")
    print os.path.isdir(dir)
    if(os.path.isdir(dir)):
        print "dir exists"
        dir_match_file(dir, bar)
    else:
        print dir

For a directory that actually exists, it returns "False". Here is the output:

False
/scratch/rists/djiao/Pancancer/RNA-seq/CESC/TCGA-BI-A0VS-01A-11R-A10U-07

When I go to python interactive session and type in os.path.isdir("/scratch/rists/djiao/Pancancer/RNA-seq/CESC/TCGA-BI-A0VS-01A-11R-A10U-07"), it returns "true".

Why does it say false when the folder exists?

Solution

The dir in download had whitespace at the end while the dir defined in the interactive session did not. The difference was discovered by printing repr(dir).

In [3]: os.path.isdir('/tmp')
Out[3]: True

In [4]: os.path.isdir('/tmp\n')
Out[4]: False