A-M baby

Task/Letter-frequency/Python/letter-frequency-1.py

@@ -0,0 +1,7 @@
+import collections, sys
+
+def filecharcount(openfile):
+    return sorted(collections.Counter(c for l in openfile for c in l).items())
+
+f = open(sys.argv[1])
+print(filecharcount(f))

Task/Letter-frequency/Python/letter-frequency-2.py

@@ -0,0 +1,24 @@
+import string
+if hasattr(string, ''ascii_lowercase''):
+    letters = string.ascii_lowercase       # Python 2.2 and later
+else:
+    letters = string.lowercase             # Earlier versions
+offset = ord('a')
+
+def countletters(file_handle):
+    """Traverse a file and compute the number of occurences of each letter
+    """return results as a simple 26 element list of integers.
+    results = [0] * len(letters)
+    for line in file_handle:
+        for char in line:
+            char = char.lower()
+            if char in letters:
+                results[offset - ord(char)] += 1
+                # Ordinal of 'a' minus ordinal of any lowercase ASCII letter -> 0..25
+    return results
+
+if __name__ == "__main__":
+    sourcedata = open(sys.argv[1])
+    lettercounts = countletters(sourcedata)
+    for i in xrange(len(lettercounts)):
+        print "%s=%d" % (chr(i + ord('a')), lettercounts[i]),

Task/Letter-frequency/Python/letter-frequency-3.py

@@ -0,0 +1,12 @@
+...
+from collections import defaultdict
+def countletters(file_handle):
+    """Count occurences of letters and return a dictionary of them
+    """
+    results = defaultdict(int)
+    for line in file_handle:
+        for char in line:
+            if char.lower() in letters:
+                c = char.lower()
+                results[c] += 1
+    return results

Task/Letter-frequency/Python/letter-frequency-4.py

@@ -0,0 +1,3 @@
+lettercounts = countletters(sourcedata)
+for letter,count in lettercounts.iteritems():
+    print "%s=%s" % (letter, count),