[Solved] in python how to count how many times certain words appear without specifying the word [duplicate]

I have a solution using Counter for you:

import collections

data = """
---------------------------------
Color: red/test/base
  person: latest
---------------------------------
Color: red-img-tests
  person: latest
---------------------------------
Color: red-zero-tests
  person: latest
---------------------------------
Color: red-replication-tests
  person: latest
---------------------------------
Color: blue
  person: latest
---------------------------------
Color: black/red-config-img
  person: 7e778bb
  person: 82307b2
  person: 8731770
  person: 7777aae
  person: 081178e
  person: c01ba8a
  person: 881b1ad
  person: d2fb1d7
---------------------------------
Color: black/pasta
  person: latest
---------------------------------
Color: black/base-img
  person: 0271332
  person: 70da077
  person: 3700c07
  person: c2f70ff
  person: 0210138
  person: 083af8d
  """

print (data)
colors = ["black", "red", "blue"]
final_count = []
for line in data.split("\n"):
    for color in colors:
        if color in line:
            final_count.append(color)
            #break # Uncomment this break if you don't want to count
            # two colors in the same line
final_count = collections.Counter(final_count)
print(final_count)

Output

Counter({'blue': 1, 'black': 3, 'red': 5})

Here‘s the link to Python official documentation and a quick reference:

This module implements specialized container datatypes providing
alternatives to Python’s general purpose built-in containers, dict,
list, set, and tuple.