我的第一个 Python 小项目，开放完整代码
你好，我是zhenguo
这是4月29日，我发布的第一个Python小项目，文本句子基于关键词的KWIC显示，没看到粉丝朋友可以看看下面介绍，知道的，直接跳到文章的求解分析和代码部分。
把所学知识应用于实际问题，才能真正加深对它的认识和理解，这就是实践出真知。从此最基本点出发，我设计了一个小项目，蛮有意思，也有一定实际应用价值。
此小项目我会同步在github库 python-small-examples中，目前近6100个star，欢迎提交pull request，有机会成为此库的第13位贡献者。
https://github.com/jackzhenguo/python-small-examples
进行中Python小项目
上下文关键字（KWIC, Key Word In Context）是最常见的多行协调显示格式。
此小项目描述：输入一系列句子，给定一个给定单词，每个句子中至少会出现一次给定单词。目标输出，给定单词按照KWIC显示，KWIC显示的基本要求：待查询单词居中，前面pre序列右对齐，后面post序列左对齐，待查询单词前和后长度相等，若输入句子无法满足要求，用空格填充。
输入参数：输入句子sentences, 待查询单词selword, 滑动窗口长度window_len
举例，输入如下六个句子，给定单词secure，输出如下字符串：
pre keyword post
welfare , and secure the blessings of
nations , and secured immortal glory with
, and shall secure to you the
cherished . To secure us against these
defense as to secure our cities and
I can to secure economy and fidelity
请补充实现下面函数：
def kwic(sentences: List[str], selword: str, window_len: int) -> str:
"""
:type: sentences: input sentences
:type: selword: selected word
:type: window_len: window length
"""
更多KWIC显示参考如下：
http://dep.chs.nihon-u.ac.jp/english_lang/tukamoto/kwic_e.html
此项目的完整代码和分析已发布在我创建的 Python中文网 http://zglg.work 中，欢迎点击文章最下的阅读原文，直达网页。
以下代码都经过测试，完整可运行。
# encoding: utf-8
"""
@file: kwic_service.py
@desc: providing functions about KWIC presentation
@author: group3
@time: 5/9/2021
"""
import re
from typing import List
获取关键词sel_word的窗口，默认窗口长度为5
def get_keyword_window(sel_word: str, words_of_sentence: List, length=5) -> List[str]:
"""
find the index of sel_word at sentence, then decide words of @length size
by backward and forward of it.
For example: I am very happy to this course of psd if sel_word is happy, then
returning: [am, very, happy, to, this]
if length is even, then returning [very, happy, to, this]
remember: sel_word being word root
"""
if length <= 0 or len(words_of_sentence) <= length:
return words_of_sentence
index = -1
for iw, word in enumerate(words_of_sentence):
word = word.lower()
if len(re.findall(sel_word.lower(), word)) > 0:
index = iw
break
if index == -1:
# log.warning("warning: cannot find %s in sentence: %s" % (sel_word, words_of_sentence))
return words_of_sentence
# backward is not enough
if index < length // 2:
back_slice = words_of_sentence[:index]
# forward is also not enough,
# showing the sentence is too short compared to length parameter
if (length - index) >= len(words_of_sentence):
return words_of_sentence
else:
return back_slice + words_of_sentence[index: index + length - len(back_slice)]
# forward is not enough
if (index + length // 2) >= len(words_of_sentence):
forward_slice = words_of_sentence[index:len(words_of_sentence)]
# backward is also not enough,
# showing the sentence is too short compared to length parameter
if index - length <= 0:
return words_of_sentence
else:
return words_of_sentence[index - (length - len(forward_slice)):index] + forward_slice
return words_of_sentence[index - length // 2: index + length // 2 + 1] if length % 2 \
else words_of_sentence[index - length // 2 + 1: index + length // 2 + 1]
KWIC显示逻辑，我放在另外一个方法中，鉴于代码长度，放在这里文章显示太长了，所以完整代码全部归档到这里：
http://www.zglg.work/Python-20-topics/python-project1-kwic/
测试代码
# encoding: utf-8
"""
@file: test_kwic_show.py
@desc:
@author: group3
@time: 5/3/2021
"""
from src.feature.kwic import kwic_show
if __name__ == '__main__':
words = ['I', 'am', 'very', 'happy', 'to', 'this', 'course', 'of', 'psd']
print(kwic_show('English', words, 'I', window_size=1)[0])
print(kwic_show('English', words, 'I', window_size=5)[0])
print(kwic_show('English', words, 'very', token_space_param=5)[0])
print(kwic_show('English', words, 'very', window_size=6, token_space_param=5)[0])
print(kwic_show('English', words, 'very', window_size=1, token_space_param=5)[0])
# test boundary
print(kwic_show('English', words, 'stem', align_param=20)[0])
print(kwic_show('English', words, 'stem', align_param=100)[0])
print(kwic_show('English', words, 'II', window_size=1)[0])
print(kwic_show('English', words, 'related', window_size=10000)[0])
打印结果
I
I am very happy to
I am very happy to this course of psd
I am very happy to this
very
None
None
None
None我正在做一个关于KWIC显示的web工具，目前还在自测中，先给大家看一下显示效果，后面部署完成后，开放给大家去体验：
点击下方 阅读原文，查看所有完整代码