在文本文件中搜索列表中的每个单词并打印行

Question

I would like to search a .txt file for a "list" of words and print any line in the txt that contains any words in the wordlist.

I firstly used .split() to split out the raw_input (called userInput ) and got a wordlist. After that I filtered the current wordlist with another blacklist wordlist and got a final filtered wordlist. I want to search the text file for any of its words in this case.

exWords = ['Who', 'How', 'What', 'How many', 'How much', 'am', 'is', 'are', '?', '!']
while True:
    userInput = raw_input("> ")
    uqWords = userInput.split()
    fqWords = [word for word in uqWords if not any(bad in word for bad in exWords)]

After I took userInput apart with .split() and called it uqWords I filtered them from any words in the exWords list and called the output fqWords . Now I want to search Database.txt for any word in the fqWords list and print the lines.

to be specified; my full code is:

import time
import random

Error = ["Sorry, I don't understand.", "I don't get it"]
exWords = ['Who', 'How', 'What', 'How many', 'How much', 'am', 'is', 'are', '?', '!']
R = "Rel > "

while True:
    userInput = raw_input("> ")
    uqWords = userInput.split()
    fqWords = [word for word in uqWords if not any(bad in word for bad in exWords)]
    DB = open("Database.txt")
    for line in DB:
        if fqWords in line:
            print (R + line[:-1])
    CDB = open("CodeDB.txt")
    for code in CDB:
        if fqWords in code:
            print (R + code[:-1])
            break
        if fqWords not in (code and line):
            randomError = random.choice(Error)
            print (R + (randomError))

Answer 1

Try using this function:

def search_for_lines(filename, words_list):
    words_found = 0
    with open(filename) as db_file:
        for line_no, line in enumerate(db_file):
            if any(word in line for word in words_list):
                print(line_no, ':', line)
                words_found += 1
    return words_found

Just pass the filename and the list of words you want to search and it will print the line number, together with the line content, and will return how many lines were found with any of the words. enumerate will give you tuples of the line number and the line itself as the file iterates over every line.

To add this to your existing code and search thought both files, you will need to first declare it, and then call it just after your assignment of fqWords like so:

import random

def search_for_lines(filename, words_list):
    words_found = 0
    with open(filename) as db_file:
        for line_no, line in enumerate(db_file):
            if any(word in line for word in words_list):
                print(line_no, ':', line)
                words_found += 1
    return words_found

Error = ["Sorry, I don't understand.", "I don't get it"]
exWords = ['Who', 'How', 'What', 'How many', 'How much', 'am', 'is', 'are', '?', '!']
R = "Rel > "

while True:
    userInput = raw_input("> ")
    uqWords = userInput.split()
    fqWords = [word for word in uqWords if not any(bad in word for bad in exWords)]
    search_for_lines("Database.txt", fqWords)

    words_found = search_for_lines("CodeDB.txt", fqWords)

    if words_found > 0:
        break
    else:
        randomError = random.choice(Error)
        print (R + (randomError))

Answer 2

If you don't need to modify a list, use tuple . And for naming identifiers see PEP 8 .
To get difference of sequences, use set , fe {1,2,3} - {2,3} is {1} .
If you open same files within a loop, it get opened in every iteration, so better move them out of the loop.

import random

def get_line_with_words(lines, words):

    """returns list of lines if any of the words
       in any of the lines
    """
    return [(i, line.strip()) for i, line in enumerate(lines,1) if any(word in line for word in words)]

errors = ("Sorry, I don't understand.", "I don't get it")
ex_words = ('Who', 'How', 'What', 'How many', 'How much', 'am', 'is', 'are', '?', '!')
prefix = "Rel > "

with open("Database.txt") as db, open("CodeDB.txt") as cdb:
    while True:
        user_input = raw_input("> ")
        uq_words = user_input.split()
        fq_words = frozenset(uq_words) - frozenset(ex_words)

        res1 = get_line_with_words(db, fq_words)
        res2 = get_line_with_words(cdb, fq_words)

        if res1 and res2:
            for n, line in res1 + res2:
                print('{} {} {}'.format(prefix, n, line)
            break

        print('{} {}'.format(prefix, random.choice(errors)))
        db.seek(0)
        cdb.seek(0)