python单词什么意思,“逐字逐句”是什么意思？语法在Python中意味着什么？

I see the following script snippet from the gensim tutorial page.

What's the syntax of word for word in below Python script?

>> texts = [[word for word in document.lower().split() if word not in stoplist]

>> for document in documents]

解决方案

This is a list comprehension. The code you posted loops through every element in document.lower.split() and creates a new list that contains only the elements that meet the if condition. It does this for each document in documents.

Try it out...

elems = [1, 2, 3, 4]

squares = [e*e for e in elems] # square each element

big = [e for e in elems if e > 2] # keep elements bigger than 2

As you can see from your example, list comprehensions can be nested.

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