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PYTHON count_chars
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Python replacement for PHP's count_chars
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It is not pretty, but it is compatible!
from collections import Counter def count_chars (s, mode = 0): """Counts the number of occurrences of every bytevalue (0..255) in string and returns it in various ways. 0  an array with the bytevalue as key and the frequency of every byte as value. 1  same as 0 but only bytevalues with a frequency greater than zero are listed. 2  same as 0 but only bytevalues with a frequency equal to zero are listed. 3  a string containing all unique characters is returned. 4  a string containing all not used characters is returned. """ temp = {chr (_x) : 0 for _x in xrange (256)} # All ASCII Characters if mode == 0: temp.update (Counter (s)) return temp elif mode == 1: temp.update (Counter (s)) res = temp.copy () for i, j in temp.iteritems (): if not j: res.pop (i) return res elif mode == 2: temp.update (Counter (s)) res = temp.copy () for i, j in temp.iteritems (): if j: res.pop (i) return res elif mode == 3: res = "" temp.update (Counter (s)) for i, j in temp.iteritems (): if j: res += i return res elif mode == 4: res = "" temp.update (Counter (s)) for i, j in temp.iteritems (): if not j: res += i return res else: raise ValueError ("Incorrect value of mode (%d)" % (mode,)) count_chars(PHP 4, PHP 5) count_chars — Return information about characters used in a string DescriptionCounts the number of occurrences of every bytevalue (0..255) in string and returns it in various ways. Parameters
Return ValuesDepending on mode count_chars() returns one of the following:
Examples
Example #1 count_chars() example
<?php The above example will output: There were 4 instance(s) of " " in the string. There were 1 instance(s) of "." in the string. There were 1 instance(s) of "F" in the string. There were 2 instance(s) of "T" in the string. There were 1 instance(s) of "a" in the string. There were 1 instance(s) of "d" in the string. There were 1 instance(s) of "e" in the string. There were 2 instance(s) of "n" in the string. There were 2 instance(s) of "o" in the string. There were 1 instance(s) of "s" in the string. There were 1 instance(s) of "w" in the string.
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