def get_integer(key, default=None):
"""Look up an environmental variable by key and return an int."""
byte_string = default
try:
byte_string = _get_environmental_variable(key)
except KeyError as k:
if default is None:
raise k
return to_integer(byte_string)
def get_integer(key):
"""Look up an environmental variable by key and return an int."""
if type(key) is not unicode:
raise UnicodeError()
byte_string = os.environ.get(str(key))
return to_integer(byte_string)
