1 import re
 2 
 3 m = re.match("abc", "abcdef")
 4 print(m.group())    # 输出：abc
 5 m = re.match("[0-9][0-9]", "75ab6cdef")
 6 print(m.group())    # 输出：75
 7 m = re.match("[0-9]{0,10}", "75ab6cdef")
 8 print(m.group())    # 输出：75
 9 m = re.findall("[0-9]{1,10}","123124fsdfsf28")
10 print(m)    # 输出：[‘123124‘, ‘28‘]
11 m = re.findall("[a-zA-Z]{1,10}","123124fsdfsf28fsdfsGG5DFSFDS3")
12 print(m)    # 输出：[‘fsdfsf‘, ‘fsdfsGG‘, ‘DFSFDS‘]
13 m = re.findall(".*","123124fsdfsf28fsdfsGG5DFSFDS3")
14 print(m)    # 输出：[‘123124fsdfsf28fsdfsGG5DFSFDS3‘, ‘‘]
15 m = re.findall(".","123fsf28fsG5DFSDS3")
16 print(m)    # 输出：[‘1‘, ‘2‘, ‘3‘, ‘f‘, ‘s‘, ‘f‘, ‘2‘, ‘8‘, ‘f‘, ‘s‘, ‘G‘, ‘5‘, ‘D‘, ‘F‘, ‘S‘, ‘D‘, ‘S‘, ‘3‘]
17 m = re.findall(".+","123124fsdf~sf28.fsdf_sGG5DFSFDS3")
18 print(m)    # 输出：[‘123124fsdf~sf28.fsdf_sGG5DFSFDS3‘]
19 m = re.search("\d+","aaa123124fsdf~sf28.fsdf_sGG5DFSFDS3")
20 print(m.group())    # 输出：1
21 m = re.sub("\d+","|","fsdf~sf28.fs df_sGG5DFSFDS3")
22 print(m)    # 输出：fsdf~sf|.fs df_sGG|DFSFDS|
23 m = re.sub("\d+","|","fsdf~sf28.fs df_sGG5DFSFDS3",count=1)
24 print(m)    # 输出：fsdf~sf|.fs df_sGG5DFSFDS3