如何在python2.7中的函数中发送变量

Question

我正在用Python2.7编写代码，需要弄清楚如何使“>”成为我在要求路线时发送的变量。 我需要多次调用此函数，有时需要为“ <”。

sentiment_point = giving_points(index_focus_word, 1, sentence, -2)

def giving_points(index_focus_word, index_sentiment_word, sentence, location):
    if index_focus_word > index_sentiment_word:
        sentiment_word = sentence[index_focus_word + location]

我尝试在下面显示我想做的事情，但这没有用。

sentiment_point = giving_points(index_focus_word, ">", 1, sentence, -2)

def giving_points(index_focus_word, sign, index_sentiment_word, sentence, location):
    if index_focus_word sign index_sentiment_word:
        sentiment_word = sentence[index_focus_word + location]

Answer 1

operator模块提供了实现Python运算符的函数。 在这种情况下，您需要operator.gt 。

import operator
sentiment_point = giving_points(index_focus_word, operator.gt, 1, sentence, -2)

def giving_points(index_focus_word, cmp, index_sentiment_word, sentence, location):
    if cmp(index_focus_word, index_sentiment_word):
        sentiment_word = sentence[index_focus_word + location]

Answer 2

sentiment_point = giving_points(index_focus_word, ">", 1, sentence, -2)
... if index_focus_word sign index_sentiment_word:

这将不起作用，因为您将“>”作为简单的String传递，而Python无法识别您打算将其作为Operator传递。

如果您的问题是二进制的（“ <”或“>”），则非常简单的解决方案是不传递String而是传递Bool值来确定要使用的运算符：

sentiment_point = giving_points(index_focus_word, True, 1, sentence, -2)

def giving_points(index_focus_word, greater, index_sentiment_word, sentence, location):
    if greater:
        if index_focus_word > index_sentiment_word:
            sentiment_word = sentence[index_focus_word + location]
        else: #....
    else:
        if index_focus_word < index_sentiment_word: