python-在更大的語料庫中替換字串

我正在尋找一種本機 python 解決方案，它允許我替換出現在字串串列中的短語。基本上，這看起來像：

text_array = ['the store has a piano','dulcimer players are popular with the ladies','guitar','rock legends dont shy away from this gibson model or this PRS electric','guitar','fender guitar','PRS electric',...]

而且我的目標是找到短語（準確地）text_array并將它們替換為我在我正在呼叫的字典中繪制的字串邏輯thesaurus：

thesaurus = {'gibson model':'guitar', 'fender guitar':'guitar', 'PRS electric':'guitar'}

問題

我將如何遍歷text_array標記的短語的每個元素并替換所有出現的短語，無論它們出現在thesaurus哪里？（注意：我只想替換完全匹配并保留字串的其余部分）。

期望的輸出：

text_array = ['the store has a piano','dulcimer players are popular with the ladies','guitar','rock legends dont shy away from this guitar or this guitar', 'guitar','guitar','guitar']

uj5u.com熱心網友回復：

這將是我的方法。這個不影響原版text_array。

text_array = ['the store has a piano','dulcimer players are popular with the ladies','guitar','rock legends dont shy away from this gibson model or this PRS electric','guitar','fender guitar','PRS electric']
thesaurus = {'gibson model':'guitar', 'fender guitar':'guitar', 'PRS electric':'guitar'}

res = []
for text in text_array:
    for key in thesaurus:
        text = text.replace(key, thesaurus[key])
    res.append(text)
print(res)

uj5u.com熱心網友回復：

您可以使用以下代碼片段來獲得預期的輸出：

text_array = ['the store has a piano','dulcimer players are popular with the ladies','guitar','rock legends dont shy away from this gibson model or this PRS electric','guitar','fender guitar','PRS electric',...]

thesaurus = {'gibson model':'guitar', 'fender guitar':'guitar', 'PRS electric':'guitar'}


for index, val in enumerate(text_array):
    # Checking if key exist in list item

    for key in list(thesaurus.keys()):
        if key in val:
            # Updating List item value
            text_array[index] = text_array[index].replace(key, thesaurus[key])

uj5u.com熱心網友回復：

使用此代碼

text_array = ['the store has a piano','dulcimer players are popular with the ladies','guitar','rock legends dont shy away from this gibson model or this PRS electric','guitar','fender guitar','PRS electric']
thesaurus = {'gibson model':'guitar', 'fender guitar':'guitar', 'PRS electric':'guitar'}
for key in thesaurus.keys():
    for i,item in enumerate(text_array):
        text_array[i]=item.replace(key,thesaurus[key])
print(text_array)

結果 ：

['the store has a piano', 'dulcimer players are popular with the ladies', 'guitar', 'rock legends dont shy away from this guitar or this guitar', 'guitar', 'guitar', 'guitar']

uj5u.com熱心網友回復：

大概只有一個匹配項，所以我們可以在內部使用生成器運算式在next“詞庫”中搜索匹配項：

如果要更改原始串列：

for i, text in enumerate(text_array):
    m = next(((k,v) for k,v in thesaurus.items() if k in text), None)
    if m:
        text_array[i] = text.replace(m[0], m[1])

如果要創建新串列：

for i, text in enumerate(text_array):
    m = next(((k,v) for k,v in thesaurus.items() if k in text), None)
    if m:
        text = text.replace(m[0], m[1])
    out.append(text)

您還可以使用熊貓：

import pandas as pd
s = pd.Series(text_array)
msk = s.str.contains('|'.join(thesaurus))
s[msk] = s[msk].replace(thesaurus, regex=True)
out = s.tolist()

輸出：

['the store has a piano',
 'dulcimer players are popular with the ladies',
 'guitar',
 'rock legends dont shy away from this guitar',
 'guitar',
 'guitar',
 'guitar']

uj5u.com熱心網友回復：

這是我的：

text_array = ['the store has a piano','dulcimer players are popular with the ladies','guitar','rock legends dont shy away from this gibson model or this PRS electric','guitar','fender guitar','PRS electric',]
thesaurus = {'gibson model':'guitar', 'fender guitar':'guitar', 'PRS electric':'guitar'}


for i in range(len(text_array)):
    for x,y in thesaurus.items():
            text_array[i] = text_array[i].replace(x,y)
            
                

print(text_array)

輸出：

['the store has a piano', 'dulcimer players are popular with the ladies', 'guitar', 'rock legends dont shy away from this guitar or this guitar', 'guitar', 'guitar', 'guitar']

uj5u.com熱心網友回復：

使用正則運算式：

import re

text_array = [
    'the store has a piano',
    'dulcimer players are popular with the ladies',
    'guitar',
    'rock legends dont shy away from this gibson model or this PRS electric',
    'guitar',
    'fender guitar',
    'PRS electric'
]

thesaurus = {
    'gibson model':'guitar',
    'fender guitar':'guitar',
    'PRS electric':'guitar'
}

pattern = re.compile(r'(?<!\w)('   '|'.join(re.escape(key) for key in thesaurus.keys())   r')(?!\w)')

for i,sentence in enumerate(text_array):
    
    text_array[i] = pattern.sub(lambda x: thesaurus[x.group()], sentence)

print(text_array)

輸出：

['the store has a piano', 'dulcimer players are popular with the ladies', 'guitar', 'rock legends dont shy away from this guitar or this guitar', 'guitar', 'guitar', 'guitar']

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