Any invalid Values for a given key MUST be ignored and MUST log a WARN level message.

Traceback (most recent call last):
  File "/Users/pmital/Developer/mongo-python-driver/pymongo/compression_support.py", line 59, in validate_zlib_compression_level
    level = int(value)
ValueError: invalid literal for int() with base 10: 'invalid'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/Users/pmital/Developer/mongo-python-driver/pymongo/mongo_client.py", line 514, in __init__
    res = uri_parser.parse_uri(entity, port, warn=True)
  File "/Users/pmital/Developer/mongo-python-driver/pymongo/uri_parser.py", line 405, in parse_uri
    options.update(split_options(opts, validate, warn))
  File "/Users/pmital/Developer/mongo-python-driver/pymongo/uri_parser.py", line 201, in split_options
    return validate_options(options, warn)
  File "/Users/pmital/Developer/mongo-python-driver/pymongo/uri_parser.py", line 145, in validate_options
    return get_validated_options(opts, warn)
  File "/Users/pmital/Developer/mongo-python-driver/pymongo/common.py", line 645, in get_validated_options
    value = validator(opt, value)
  File "/Users/pmital/Developer/mongo-python-driver/pymongo/compression_support.py", line 61, in validate_zlib_compression_level
    raise TypeError("%s must be an integer, not %r." % (option, value))
TypeError: zlibCompressionLevel must be an integer, not 'invalid'.