Python: How do I make this regex work when Input is read from file
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    >>> line = '\xc2d sdsdfdslkfsdkfjdsf'
    >>> pattern_strings = ['\xc2d', '\xe9']
    >>> pattern = '|'.join(pattern_strings)
    >>> pattern
    '\xc2d|\xe9'
    >>> import re
    >>> re.findall(pattern, line)
    ['\xc2d']

When I put `line` in a file and try to do the same regex, it doen't show up anything  

    def find_pattern(path):
    	with open(path) as f:
    		for line in f:
    			line = line.strip()
    			pattern_strings = ['\xc2d', '\xe9']
    			pattern = '|'.join(pattern_strings)
    			print re.findall(pattern, line)

where `path` is a file looked as following  
`\xc2d sdsdfdslkfsdkfjdsf`