Question

Write a python program that will create a histogram of the number of times each character occurs in a file. Check https://en.wikipedia.org/wiki/Histogram and http://interactivepython.org/runestone/static/thinkcspy/Functions/ATurtleBarChart.html for help. Your program will read any input text file and print the histogram. If you have a huge file you should have a graph similar to:

0.14 012 0.1 008 0.06 0.04 0.02

Note the y-axis shows the percentage of each letter. The height of each bar is percentage of that letter. Program MUST show the graph with percentage marks on y-axis and letters on the x-axis as shown in the graph below. THE GRAPH MUST HAVE THE TICK MARKS AND LABELS ON Y AND X AXES. Please don't answer if you can't do that, this is my third time asking this question on here. Matplotlib and any other external plotting libraries can't be used, only the python turtle to draw.

Answer 1

# Python3 code to demonstrate
# each occurrence frequency using
# naive method

# initializing string
test_str = "GeeksforGeeks"

# using naive method to get count
# of each element in string
all_freq = {}

for i in test_str:
   if i in all_freq:
       all_freq[i] += 1
   else:
       all_freq[i] = 1

# printing result
print ("Count of all characters in GeeksforGeeks is :\n "
                                       + str(all_freq))

# Python3 code to demonstrate
# each occurrence frequency using
# collections.Counter()
from collections import Counter

# initializing string
test_str = "GeeksforGeeks"

# using collections.Counter() to get
# count of each element in string
res = Counter(test_str)

# printing result
print ("Count of all characters in GeeksforGeeks is :\n "
                                       + str(res))

# Python3 code to demonstrate
# each occurrence frequency using
# dict.get()

# initializing string
test_str = "GeeksforGeeks"

# using dict.get() to get count
# of each element in string
res = {}

for keys in test_str:
   res[keys] = res.get(keys, 0) + 1

# printing result
print ("Count of all characters in GeeksforGeeks is : \n"
                                           + str(res))

# Python3 code to demonstrate
# each occurrence frequency using
# set() + count()

# initializing string
test_str = "GeeksforGeeks"

# using set() + count() to get count
# of each element in string
res = {i : test_str.count(i) for i in set(test_str)}

# printing result
print ("The count of all characters in GeeksforGeeks is :\n "
                                           + str(res))