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POpython regex: pattern not found
 

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  1. POpython regex: pattern not found
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    <p>I have a pattern compiled as </p> <pre><code>pattern_strings = ['\xc2d', '\xa0', '\xe7', '\xc3\ufffdd', '\xc2\xa0', '\xc3\xa7', '\xa0\xa0', '\xc2', '\xe9'] join_pattern = '|'.join(pattern_strings) pattern = re.compile(join_pattern) </code></pre> <p>and then I find pattern in file as </p> <pre><code>def find_pattern(path): with open(path, 'r') as f: for line in f: print line found = pattern.search(line) if found: print dir(found) logging.info('found - ' + found) </code></pre> <p>and my input as <code>path</code> file is </p> <pre><code>\xc2d d\xa0 \xe7 \xc3\ufffdd \xc3\ufffdd \xc2\xa0 \xc3\xa7 \xa0\xa0 '619d813\xa03697' </code></pre> <p>When I run this program, nothing happens.</p> <p>I it not able to catch these patterns, what is am I doing wrong here?</p> <p><strong>Desired output</strong> - each line because each line has one or the other matching pattern</p> <p><strong>Update</strong></p> <p>After changing the regex to </p> <pre><code>pattern_strings = ['\\xc2d', '\\xa0', '\\xe7', '\\xc3\\ufffdd', '\\xc2\\xa0', '\\xc3\\xa7', '\\xa0\\xa0', '\\xc2', '\\xe9'] </code></pre> <p>It is still the same, no output</p> <p><strong>UPDATE</strong></p> <p>after making regex to </p> <pre><code>pattern_strings = ['\\xc2d', '\\xa0', '\\xe7', '\\xc3\\ufffdd', '\\xc2\\xa0', '\\xc3\\xa7', '\\xa0\\xa0', '\\xc2', '\\xe9'] join_pattern = '[' + '|'.join(pattern_strings) + ']' pattern = re.compile(join_pattern) </code></pre> <p>Things started to work, but partially, the patterns still not caught are for line </p> <pre><code>\xc2\xa0 \xc3\xa7 \xa0\xa0 </code></pre> <p>for which my pattern string is <code>['\\xc2\\xa0', '\\xc3\\xa7', '\\xa0\\xa0']</code></p>
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    1. PO
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      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USdaydreamer
    1. USdaydreamer
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
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      1. PTAnswer
    2. PO
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    1. This table or related slice is empty.
    1. COis it possible the \x is being escaped from in the file? in which case you need to match \\x ?
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      1. POpython regex: pattern not found
      1. USJoran Beasley
    2. COAre you looking for literal backslashses? I agree with Joran - this looks like an escape bug.
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      1. POpython regex: pattern not found
      1. USMark Tozzi
    3. COyes I am looking for literal backslashes
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      1. POpython regex: pattern not found
      1. USdaydreamer
 

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