Python - 检查两个单词是否在字符串中

Question

我想检查两个词“汽车”和“摩托车”是否在 Python 中数组的每个元素中。我知道如何用in 检查一个词，但不知道如何处理两个词。非常感谢任何帮助

Answer 1

二字解法：

for string in array:
    if 'car' in string and 'motorbike' in string.split():
        print("Car and motorbike are in string")

检查test_words中的所有个单词是否在string中的

n-word解决方案：

test_words = ['car', 'motorbike']
contains_all = True

for string in array:
    for test_word in test_words:
        if test_word not in string.split()::
            contains_all = False
            break
    if not contains_all:
        break

if contains_all:
    print("All words in each string")
else:
    print("Not all words in each string")

Answer 2

使用辅助布尔值。

car=False
 motorbike=False
 for elem in array:

        if "car" in elem:
            car=True
        if "motorbike" in elem:
            motorbike=True
        if car and motorbike:
            break

编辑：我刚刚阅读了“在每个元素中”。只需使用 AND。

Answer 3

我认为一个简单的解决方案是这样的：

all(map(lambda w: w in text, ('car', 'motorbike')))

但这可能存在问题，具体取决于您需要比较的挑剔程度：

>>> text = 'Can we buy motorbikes in carshops?'
>>> all(map(lambda w: w in text, ('car', 'motorbike')))
True

“汽车”和“摩托车”这两个词不在 text 中，这仍然是 True。您可能需要完全匹配的单词。我会这样做：

>>> words = ('car', 'motorbike')
>>> text = 'Can we buy motorbikes in carshops?'
>>> set(words).issubset(text.split())
False
>>> text = 'a car and a motorbike'
>>> set(words).issubset(text.split())
True

现在它可以工作了！

Answer 4

我会使用all 函数：

wanted_values = ("car", "motorbike")
all(vehicle in text for text in wanted_values)

如果我们有一个字符串列表：

l = ['some car and motorbike',
     'a motorbike by a car',
     'the car was followed by a motorbike']

lines_with_vehicles = [text for text in l
                       if all(vehicle in text for text in wanted_values)]

使用正则表达式，您可以：

# no particular order
car_and_motorbike_pattern = re.compile(r'(car.*motorbike|motorbike.*car)')
all(car_and_motorbike_pattern.search(text) for text in list_of_expressions)

# This works too
car_or_motorbike_pattern = re.compile(r'(car|motorbike)')
get_vehicles = car_or_motorbike_pattern.findall
all(len(set(get_vehicles(text))) == 2 for text in list_of_expressions)

Answer 5

This link 为我工作： 它提供了 3 种解决方案。两种方法使用列表推导式，第三种方法使用 map + lambda 函数。

---

我认为没有一种简单且 Pythonic 的方法可以做到这一点。您需要使用如下丑陋的逻辑：

image_file_name = 'man_in_car.jpg'
if 'car' in image_file_name and 'man' in image_file_name:
    print('"car" and "man" were found in the image_file_name')

这适用于两个单词，但是如果您需要检查很多单词，那么最好使用上面链接中的代码

---

我希望能够做类似的事情：

if 'car' and 'man' in image_file_name:
    print('"car" and "man" were found in the image_file_name')

或者：

if any(['car','man'] in image_file_name):
    print('"car" and "man" were found in the image_file_name')

但是最后这 2 段代码在 python 中还不能工作。

Answer 6

使用此功能可以检查句子中带有“and”或“or”运算符的两个或多个关键字。

def check_words(operator = 'and', words = ['car', 'bike'],
                sentence = 'I own a car but not a bike'):

    if operator == 'and':
        word_present = True
        for w in words:
            if w in sentence:
                word_present = True
            else:
                word_present = False
        return word_present

    elif operator == 'or':
        for w in words:
            if w in sentence:
                return True
            else:
                return False
        

check_words(operator = 'and', words = ['car', 'bike'],
            sentence = 'I own a car but not a bike')