我有一個(gè)字符串列表，我想將每個(gè)字符串拆分為一個(gè)浮點(diǎn)數(shù)。如果字符串中沒(méi)有浮點(diǎn)數(shù)，我想將它拆分為一個(gè)數(shù)字。它應(yīng)該只拆分一次并返回它之前和之后的所有內(nèi)容，并用逗號(hào)分隔。輸入字符串：['Naproxen 500 Active ingredient Ph Eur', 'Croscarmellose sodium 22.0 mg Disintegrant Ph Eur', 'Povidone K90 11.0 Binder 56 Ph Eur', 'Water, purifieda, 'Silica, colloidal anhydrous 2.62 Glidant Ph Eur', 'Water purified 49 Solvent Ph Eur', 'Magnesium stearate 1.38 Lubricant Ph Eur']預(yù)期輸出：['Naproxen', '500', 'Active ingredient Ph Eur', 'Croscarmellose sodium', '22.0 mg', 'Disintegrant Ph Eur', 'Povidone K90', '11.0', 'Binder Ph Eur', 'Water, purifieda', 'Silica, colloidal anhydrous', '2.62', 'Glidant Ph Eur', 'Water purified', '49', 'Solvent Ph Eur', 'Magnesium stearate', '1.38', 'Lubricant Ph Eur']我的代碼：for i in newresult: regex_float_part = re.split(r'\s+(\d+\.\d+)\s+', i, 1)# print(regex_float_part)# regex_float_part_n = [item for sublist in regex_float_part for item in sublist] if regex_float_part: all_extract.append(regex_float_part) else:# regex_integer = r'\s+(\d+(?:\\d+)?)\s+' regex_integer_part = re.split(r'\s+(\d+(?:\\d+)?)\s+', i, 1)# regex_integer_part_n = [item for sublist in regex_integer_part for item in sublist] all_extract.append(regex_integer_part)問(wèn)題在于這個(gè)輸入字符串：'Water purified 49 Solvent Ph Eur',這并不像預(yù)期的那樣：'Water purified', '49', 'Solvent Ph Eur'那就是代碼不會(huì)進(jìn)入其他部分。一個(gè)觀察是我的正則表達(dá)式的拆分函數(shù)正在創(chuàng)建一個(gè)列表列表，即 regex_float_part 和 regex_integer_part 是列表列表。誰(shuí)能幫我解決我的代碼沒(méi)有響應(yīng)的字符串的問(wèn)題
2 回答
梵蒂岡之花
TA貢獻(xiàn)1900條經(jīng)驗(yàn) 獲得超5個(gè)贊
你的正則表達(dá)式幾乎是正確的，但你必須考慮.到點(diǎn)后面的數(shù)字和數(shù)字可能不存在。這可以這樣實(shí)現(xiàn)：
\s+(\d+(?:\.\d+)?)\s+
不同之處在于，您可以通過(guò)在組后使用問(wèn)號(hào)將其添加到可能存在或不存在\.\d+的非捕獲組中：(?:xxxx)(?:xxxx)?
素胚勾勒不出你
TA貢獻(xiàn)1827條經(jīng)驗(yàn) 獲得超9個(gè)贊
我建議使用
res = re.match(r'^(?:(?!.*\d\.\d)(.*?)\s*\b(\d+(?:\s*mg)?)\b\s*(.*)|((?:(?!\d+\.\d).)*?)\s*\b(\d+\.\d+(?:\s*mg)?)\b\s*(.*))$', i)
if res:
all_extract.append(list(filter(None, res.groups())))
請(qǐng)參閱正則表達(dá)式演示。
沒(méi)有注釋代碼的完整Python 演示：
import re
def show():
newresult = ['Naproxen 500 Active ingredient Ph Eur','Croscarmellose sodium 22.0 mg Disintegrant Ph Eur','Povidone K90 11.0 Binder 56 Ph Eur','Water, purifieda','Silica, colloidal anhydrous 2.62 Glidant Ph Eur','Water purified 49 Solvent Ph Eur','Magnesium stearate 1.38 Lubricant Ph Eur']
all_extract = []
for i in newresult:
res = re.match(r'^(?:(?!.*\d\.\d)(.*?)\s*\b(\d+(?:\s*mg)?)\b\s*(.*)|((?:(?!\d+\.\d).)*?)\s*\b(\d+\.\d+(?:\s*mg)?)\b\s*(.*))$', i)
if res:
all_extract.append(list(filter(None, res.groups())))
else:
print("ONLY INTEGER")
regex_integer_part = re.split(r'\s+(\d+(?:\.\d+)?)\s+', i, 1)
all_extract.append(regex_integer_part)
return all_extract
print(show())
產(chǎn)量
[['Naproxen', '500', 'Active ingredient Ph Eur'], ['Croscarmellose sodium', '22.0 mg', 'Disintegrant Ph Eur'], ['Povidone K90', '11.0', 'Binder 56 Ph Eur'], ['Water, purifieda'], ['Silica, colloidal anhydrous', '2.62', 'Glidant Ph Eur'], ['Water purified', '49', 'Solvent Ph Eur'], ['Magnesium stearate', '1.38', 'Lubricant Ph Eur']]
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