尝试计算文本文件中的单词时出现问题

Question

I am trying to make this program work out but I am having some issues at the moment. I want this code to read the total amount of words across this text file . This is what I have for now:

import os

openfile = input('Enter the input file: ')

accumulator = 0
accumulator2 = 0
accumulator3 = 0
accumulator4 = 0
word = 'PMID'
word2 = 'LA'
word3 = 'PT  - Journal'
try: 
    file = open(openfile, 'r')
    lines = file.readlines()

    with open(openfile, 'r') as f:
        lines = f.readlines()

    for line in lines:
        if word in line:
                accumulator += 1

        if word2 in line:
            accumulator2 += 1

        if word2 in line:
            accumulator3 += 1

        if 'Journal' in line and 'LA' in line:
                accumulator4 += 1

    print('there are:',accumulator ,'PMID')
    print('there are:',accumulator2 ,'LA')
    print('there are:',accumulator3 ,'PT')
    print('there are:',accumulator4 ,'PT and LA')
    exit()

except FileNotFoundError:
    print('Input file not found.')
    print('Please check the file name or the location of your input file.')

I want it to also count the text blocks that have together "LA - eng" "PT - Journal Article" as one (like the third block). Is there a way to do this even though they are in different lines? Thank you so much!

Answer 1

This method I have from a course I took on Pluralsight some time ago, will output the number of instances of each word in the file. This is useful when working with sentiment analysis algorithms:

    results = dict()
    with open(filename, 'r') as f:
        for line in f:
            for word in line.split():
                results[word] = results.setdefault(word, 0) + 1

    for word, count in sorted(results.items(), key=lambda x: x[1]):
        print('{} {}'.format(count, word))

You can run it like this in PyCharm Community version, having the file in the same directory as the project:

make sure the method is defined above the main check.

if __name__ == '__main__':
    count_words('word_file.txt')