Invalid character in identifier

I am working on the letter distribution problem from HP code wars 2012. I keep getting an error message that says “invalid character in identifier”. What does this mean and how can it be fixed?

Here is the page with the information.

import  string

def  text_analyzer(text):
'''The text to be parsed and
the number of occurrences of the letters given back
be. Punctuation marks, and I ignore the EOF
simple. The function is thus very limited.

'''
    result =  {}
 
# Processing
    for  a in  string.ascii_lowercase:
    result [a] =  text.lower (). count (a)
 
    return  result


def  analysis_result (results):

# I look at the data
    keys =  analysis.keys ()
    values \u200b\u200b=  list(analysis.values \u200b\u200b())
    values.sort (reverse = True )

# I turn to the dictionary and
# Must avoid that letters will be overwritten
    w2 =  {}
    list =  []
 
    for  key in  keys:
        item =  w2.get (results [key], 0 )
        if  item = =  0 :
            w2 [analysis results [key]] =  [key]