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                正則表達式 === demo1: ~~~ import re a = 'C|C++|Java|C#|Python|Golang' result = re.findall('(Python)',a) # 規則,數據 print(result) ~~~ demo2: ~~~ a = "C0C++7Java8Cs848PSD778ASD" # 目標: 提取a中所有數字 result = re.findall("(\d)",a) print(result) ~~~ demo3: ~~~ data = "abc, acc, adc, aec, afc, ahsc" # 目標: 獲取中間的 result = re.findall('a([\w])c',data) print(result) ~~~ demo4: ~~~ data = 'python 1111java445php24848golang' # 目標: 獲取語言名稱 result = re.findall('[a-z]{3,6}',data) print(result) ~~~ demo5: ~~~ data = 'python 1111java445php24848golang' # 目標: 獲取python result = re.findall('p[\w\W]+?n',data) print(result) ''' # 數量詞 * 匹配0次或者無限次 + 匹配1次或者無限次 ? 匹配0次或者1次 ''' ~~~ ### 模式匹配 ``` re.findall("c#.{1}",data,re.I | re.S) # re.I 或略大小寫 # re.S 匹配空白 ```
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