Multi tool use

read from a text file, tally the results and print them out (python)

I am trying to gather a list from a .txt file, tally the results and then print them out like this

Bones found:
Ankylosaurus: 3
Pachycephalosaurus: 1
Tyrannosaurus Rex: 1
Struthiomimus: 2


An eample of the dot text file is

Ankylosaurus
Pachycephalosaurus
Ankylosaurus
Tyrannosaurus Rex
Ankylosaurus
Struthiomimus
Struthiomimus


My current code pulls all the names from the .txt file, except im completely stuck from there

frequency =
for line in open('bones.txt'):
bones = line.split()
print(bones)


Any help please?

3 Answers
3

Using collections.defaultdict

collections.defaultdict

Ex:

from collections import defaultdict

d = defaultdict(int)

with open(filename) as infile: #Open File
for line in infile: #Iterate Each Line
d[line.strip()] += 1

print("Bones found:")
for k, v in d.items():
print(": ".format(k, v))


Output:

Bones found:
Struthiomimus: 2
Pachycephalosaurus: 1
Ankylosaurus: 3
Tyrannosaurus Rex: 1


Store each line as a dictionary key (initialized to 0 if line isn't in dict) and increment the value:

frequency =
for line in open('bones.txt'):
if line not in frequency:
frequency[line] = 0

frequency[line] += 1

for k, v in frequency.items():
print(': '.format(k, v))


You can use Counter function from collections library to get this.

from collections import Counter
f=open('bones.txt','r')
ls=f.readlines()
s=dict(Counter(ls))

for k in s.keys():
print (':'.format(k,s[k]))


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