Summarize data in a list in python

Question

In python i need to summarize data in count_list this way (like a histogram):

"""
number | occurence
  0 | *
  1 | **
  2 | ***
  3 | **
  4 | **
  5 | *
  6 | *
  7 | **
  8 | ***
  9 | *
  10 | **
"""

But instead I get this wrong output:

"""
number | occurence
  0 | 
  1 | **
  2 |
  3 |
  4 |
  5 |
  6 | **
  7 |
  8 |
  9 |
  10 | **
"""

Here is my code:

import random
random_list = []
list_length = 20
while len(random_list) < list_length:
    random_list.append(random.randint(0,10))
count_list = [0] * 11
index = 0

while index < len(random_list):
   number = random_list[index]
    count_list[number] = count_list[number] + 1
    index = index + 1


def summerizer():
    index = 0
    print count_list
    print '"'*3
    print 'number  |  occurrence'
    while index < len(count_list):
      print '%s' %' '*(7),
      print index,#the problem is here
      print ' | ',#and here
      print '%s' %'*'*(count_list[index])
      index += 1
    print '%s'%'"'*3


summerizer()

what is the output you get? please provide as much information as possible! It'd help a lot — kbunarjo, Feb 02 '18 at 07:04
I have edited the question adding wrong answer i get.... attached picture — Ahmed Al-Bahnassy, Feb 02 '18 at 07:29
@FlyingTeller this didn't help....may u can explain more with code please?? — Ahmed Al-Bahnassy, Feb 02 '18 at 08:08
I was asking for clarification: do you want your index to be printed with a fixed width? That is, so it aligns correctly with your column headers? — FlyingTeller, Feb 02 '18 at 08:09
Why do you do `print '%s'%'"'*3` instead of just `print '"""'`? — tobias_k, Feb 02 '18 at 09:35
I don't see a problem with your output. The counts seem to match. You are aware that you are printing `count_list` before the table, not `random_list`, right? — tobias_k, Feb 02 '18 at 09:39
Yes @FlyingTeller .. also need a some stars representing the value inside cout_list — Ahmed Al-Bahnassy, Feb 02 '18 at 12:31
Instead of generating random input, please add one _specific_ input list to your question, and the expected and actual/wrong output you get for that input, and explain why (you think) this output is wrong and why you expect the other output. — tobias_k, Feb 02 '18 at 13:23

score 1 · Answer 1 · answered Feb 02 '18 at 09:44

1

This method uses collections.Counter:

from collections import Counter
import random

random_list = []
list_length = 20

while len(random_list) < list_length:
    random_list.append(random.randint(0,10))

c = Counter(random_list)

print('number  |  occurrence')
def summerizer(dic):
    for v,d in dic.items():
        print(v, '|', '%s'%'*'*c[v])

summerizer(dic)

answered Feb 02 '18 at 09:44

jpp

159,742
34
281
339

No same output also – Ahmed Al-Bahnassy Feb 02 '18 at 12:33
1

@AhmedAl-Bahnassy Which should show you that your output is the correct output. So what's the problem? – tobias_k Feb 02 '18 at 13:21

Artier · Answer 2 · 2018-02-02T13:18:01.330

0

Try this

import random
random_list = []
list_length = 20
while len(random_list) < list_length:
    random_list.append(random.randint(0,10))
dic={}
for i in random_list:
    dic[i]=dic.get(i,0)+1
print 'number  |  occurrence'
for i in range(0,11):
    if(i not in dic):    
        print i,"|",'%s' %'*'*(0)
    else:
        print i,"|",'%s' %'*'*(dic[i])

Out put

[9, 8, 4, 2, 5, 4, 8, 3, 5, 6, 9, 5, 3, 8, 6, 2, 10, 10, 8, 9]

number  |  occurrence
0 |
1 | 
2 | **
3 | **
4 | **
5 | ***
6 | **
7 | 
8 | ****
9 | ***
10 | **

edited Feb 02 '18 at 13:18

answered Feb 02 '18 at 09:07

Artier

1,648
2
8
22

No same output with me – Ahmed Al-Bahnassy Feb 02 '18 at 12:27
So you want to count 1 also if it is zero? – Artier Feb 02 '18 at 13:03

score 0 · Answer 3 · answered Feb 02 '18 at 12:50

Yes i have found the problem

It is from the ide itself !!! This was a quiz in a course on UDACITY android application and the embedded compiler inside it make this wrong answer..

Same code i tried now from pydroid application on Android also made the answer that i need without any change

Thanks for trying to help all of you

`import random
 random_list = []
 list_length = 20
 while len(random_list) < list_length:
  random_list.append(random.randint(0,10))
 count_list = [0] * 11
 index = 0

 while index < len(random_list):
  number = random_list[index]
  count_list[number] = count_list[number] + 1
  index = index + 1

def summerizer():
 index = 0
 print count_list
 print '"'*3
 print 'number  |  occurrence'
 while index < len(count_list):
  print '%s' %' '*(7),
  print index,
  print ' | ',
  print '%s' %'*'*(count_list[index])
  index += 1
 print '%s'%'"'*3

summerizer()`

Summarize data in a list in python

3 Answers3