在文本文件中找到行

Question

您將實現函數index（），該函數將文本文件的名稱和單詞列表作為輸入。 對於列表中的每個單詞，您的函數都將在文本文件中找到單詞所在的行，並打印相應的行號（編號從1開始）。 您應該只打開和讀取一次文件。

我只能計數一次。

def index(filename, words):
    infile = open(filename)
    content = infile.readlines()
    infile.close()
    count = {}
    for word in words:
        if word in count:
            count[word] += 1
        else:
            count[word] = 1
        for word in count:
            print('{:12}{},'.format(word, count[word]))

    Output :index('raven.txt',['raven'])
        raven       1,
    Desired Output : index('raven.txt',['raven'])
       raven 44, 53, 55, 64, 78, 97, 104, 111, 118, 12(No of lines it appear)

Answer 1

可能會遇到相同的問題..我寫了下面..

def index(filename, lst):
    infile = open(filename, 'r')
    content = infile.readlines()
    infile.close()

    for word in lst:
        print(word, end = '\t')
        for line in range(len(content)):
            if word in content[line]:
            print(line+1, end= ' ')
        print()

index('raven.txt', ['raven'])

Answer 2

未經測試，但應該可以工作

def index(filename, words):
    with open(filename, "r") as f:
        for i, line in enumerate(f):
            for word in words:
                if word in line:
                    return "%s at line %i" % (word, i + 1)

print index("some_filename", ["word1", "word2"])

或避免嵌套for循環：

def index(filename, words):
    with open(filename, "r") as f:
        for line, word in itertools.product(enumerate(f), words):
            if word in line[1]:
                return "%s at line %i" % (word, line[0] + 1)

print index("some_filename", ["word1", "word2"])

並使用列表推導：

def index(filename, words):
    with open(filename, "r") as f:
        return "\n".join("%s at line %i" % (word, line[0] + 1) for line, word in itertools.product(enumerate(f), words) if word in line[1])

print index("some_filename", ["word1", "word2"])

Answer 3

這個例子怎么樣：

File1.txt

Y
x
u
d
x
q

碼：

word='x'
i = 0
with open('file1.txt', 'r') as file:
    for line in file:
        i = i +1
        if word in line:
            print(i)
            print('Found It')

在此示例中，您讀入一個文件，並逐行瀏覽。 在每一行中，您都查看一個單詞是否存在。 如果是這種情況，我們將在屏幕上打印一些內容。

編輯：
或定義為：

filename='file1.txt'
word='x'
def index(filename, word):
    i = 0
    with open(filename, 'r') as file:
        for line in file:
            i = i +1
            if word in line:
                print(i)
                print('Found It')

index(filename, word)