我剛剛學習正則表達式，但無法從列表中獲取單詞從這樣的列表中：[ "1. hello - jeff", "2. gello - meff", "3. fellow - gef", "12. willow - left"]我想檢索單詞：“hello”、“gello”、“fellow”和“willow”這是到目前為止我的簡化代碼for i in [ARRAY OF LISTED WORDS]:
word = re.findall(r'^((?![0-9]?[0-9]. ))\w+', i)
print(word)
2 回答
弒天下
TA貢獻1818條經驗 獲得超8個贊
您正在查找數字之間的一個或多個非空格( '\S+')，后跟句點，后跟空格 ( '\d+\.\s')，以及空格后跟短劃線 ( '\s-')：
pattern = r'\d+\.\s(\S+)\s-' [re.findall(pattern, l)[0] for l in your_list]
德瑪西亞99
TA貢獻1770條經驗 獲得超3個贊
你的正則表達式模式：
pattern = r"""
\d+ # 1 or more digits
\. # Escaped period character
\s+? # 1 or more whitespace
(\w+) # 1 or more alphabetic characters
\s+ # 1 or more whitespace
- # hyphen
.* # zero or more of anything besides newline.
"""
字符串列表：
words = [ "1. hello - jeff", "2. gello - meff", "3. fellow - gef", "12. willow - left"]
for word in words:
# capture results in a variable
# re.X for verbose pattern format.
tmp = re.search(pattern, word, flags = re.X)
# If variable is not None, print results of the first captured group.
if tmp:
print(tmp.group(1))
輸出：
hello
gello
fellow
willow
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