Question

我有元素列表，其中包含数字，字母和特殊字符。

string = ['1 B, 14/A - P,1C,2A,21 C - A','3P,21B,2-A,1A','3C,2-W,ABC 200','3 Z,ABC 100 - BB','ABC 300,ABC 200','ABC 200,ABC 100','1c/A,2 - z']
string

['1 B, 14/A - P,1C,2A,21 C - A',    
 '3P,21B,2-A,1A',
 '3C,2-W,ABC 200',
 '3 Z,ABC 100 - BB',
 'ABC 300,ABC 200',
 'ABC 200,ABC 100',
 '1c/A,2 - z']

我要提取与条件匹配的元素。

条件：-列表中的元素应为starting with the Matching number或

以ABC (Matching number)

开头

必填输出：

starting_with_one = ['1 B, 14/A - P,1C,2A,21 C - A','3P,21B,2-A,1A','3 Z,ABC 100 - BB','ABC 200,ABC 100','1c/A,2 - z']

['1 B, 14/A - P,1C,2A,21 C - A',  --->    # Here `1 B ,14/A - P,1C` are contains the number 1  
 '3P,21B,2-A,1A',                --->   # Here `1A` Contains the number 1   
 '3 Z,ABC 100 - BB',               --->  # Here `ABC 100 - BB` Contains the number 1  
 'ABC 200,ABC 100',                   --->  # Here `ABC 100` Contains the number 1
 '1c/A,2 - z']                        ---> Here `1c/A' contains 1



starting_with_two = ['1 B, 14/A - P,1C,2A,21 C - A','3P,21B,2-A,1A','3C,2-W,ABC 200','ABC 300,ABC 200','ABC 200,ABC 100','1c/A,2 - z']

['1 B, 14/A - P,1C,2A,21 C - A',
 '3P,21B,2-A,1A',
 '3C,2-W,ABC 200',
 'ABC 300,ABC 200',
 'ABC 200,ABC 100',
 '1c/A,2 - z']

我尝试过的事情：

搜索数字1

for i in string:
    print(re.search(r"(^|[^\d])(1)", i))

<_sre.SRE_Match object; span=(0, 1), match='1'>
<_sre.SRE_Match object; span=(10, 12), match=',1'>
None
<_sre.SRE_Match object; span=(7, 9), match=' 1'>
None
<_sre.SRE_Match object; span=(11, 13), match=' 1'>
<_sre.SRE_Match object; span=(0, 1), match='1'>

Answer 1

您可以使用

r'\b(?:ABC\s+)?1'

标识要保留的字符串。参见the regex demo。

详细信息

\b-单词边界
(?:ABC\s+)?-可选的子字符串：ABC，然后是1+个空格
1-1字符。

请参见Python demo：

import re
strs = ['1 B, 14/A - P,1C,2A,21 C - A','3P,21B,2-A,1A','3C,2-W,ABC 200','3 Z,ABC 100 - BB','ABC 300,ABC 200','ABC 200,ABC 100','1c/A,2 - z']
for s in strs:
    if re.search(r'\b(?:ABC\s+)?1', s):
        print(s)

输出：

1 B, 14/A - P,1C,2A,21 C - A
3P,21B,2-A,1A
3 Z,ABC 100 - BB
ABC 200,ABC 100
1c/A,2 - z

从元素列表中提取匹配的数字

1 个答案: