输入一段全英文句子，求其中最长的英文单词及其长度python

To find the longest English word and its length in a Python sentence, you can use the `split()` function to split the input string into words, then iterate through them, checking their length using the `len()` function. Here's a simple example:

def find_longest_word(sentence):
    # Split the sentence into words
    words = sentence.split()
    
    # Initialize variables for longest word and its length
    longest_word = ""
    max_length = 0
    
    # Iterate over the words
    for word in words:
        # Check if current word is longer than the previous longest
        if len(word) > max_length and all(c.isalpha() or c.isspace() for c in word):  # Only consider alphabetic words
            longest_word = word
            max_length = len(word)
            
    return longest_word, max_length

# Example usage
sentence = "This is a sample sentence with some long words like 'programming', for instance."
longest_word, word_length = find_longest_word(sentence)
print(f"The longest word is '{longest_word}' and its length is {word_length}.")