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POLetter frequency in python
 

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    <p>I need to make a program that prints out the frequency of letters in a text file and compares that frequency with that of another in python.</p> <p>So far I am able to print the number of times a letter occurs, but the percentage frequency I get is wrong. I think it is because I need my program to count only the number of letters in the file by removing all the spaces and other characters. </p> <pre><code>def addLetter (x): result = ord(x) - ord(a) return result #start of the main program #prompt user for a file while True: speech = raw_input("Enter file name:") wholeFile = open(speech, 'r+').read() lowlet = wholeFile.lower() letters= list(lowlet) alpha = list('abcdefghijklmnopqrstuvwxyz') n = len(letters) f = float(n) occurrences = {} d = {} #number of letters for x in alpha: occurrences[x] = letters.count(x) d[x] =(occurrences[x])/f for x in occurrences: print x, occurrences[x], d[x] </code></pre> <p>This is the output</p> <pre><code>Enter file name:dems.txt a 993 0.0687863674148 c 350 0.0242449431976 b 174 0.0120532003325 e 1406 0.0973954003879 d 430 0.0297866444999 g 219 0.015170407315 f 212 0.0146855084511 i 754 0.0522305347742 h 594 0.0411471321696 k 81 0.00561097256858 j 12 0.000831255195345 m 273 0.0189110556941 l 442 0.0306178996952 o 885 0.0613050706567 n 810 0.0561097256858 q 9 0.000623441396509 p 215 0.0148933222499 s 672 0.0465502909393 r 637 0.0441257966196 u 305 0.021127736215 t 1175 0.0813937378775 w 334 0.0231366029371 v 104 0.00720421169299 y 212 0.0146855084511 x 13 0.000900526461624 z 6 0.000415627597672 Enter file name: </code></pre> <p>The program does print in columns, but I'm not really sure how to display that here. </p> <p>the frequency for "a" should be .0878</p>
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    1. COIs this a homework assignment?
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    2. COYour "f" variable contains the total length of the list, not the number of alphabetic characters in the list. Also - don't cheat on your homework using SO. If you don't learn it yourself you won't ever learn it.
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    3. COYes this is a hw assignment. I wasn't trying to cheat. I just hit a dead end and needed some direction. Thanks for all your help.
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