Ascii Encoding Error

[Navdevl]

I have attached the trace below:

Traceback (most recent call last):
  File "blazy.py", line 204, in <module>
    find()
  File "blazy.py", line 106, in find
    data = str(f) #Converts the response recieved to string
  File "/Users/xyz/Blazy/blazyenv/lib/python2.7/site-packages/mechanize/_form_controls.py", line 1932, in __str__
    rep.append("  %s" % str(control))
UnicodeEncodeError: 'ascii' codec can't encode character u'\u2713' in position 20: ordinal not in range(128)