正则表达式

正则表达式

1、findall的用法 HJ33

import re
def change_ipaddr(ip):
    ip = ip.split(".")
    res = ''
    for i in ip:
        i = bin(int(i))[2:].rjust(8,'0')
        res +=i
    return int(res,2)

def change_number(number):
    ip_list = []
    data = bin(int(number))[2:].rjust(32,'0')
    data = re.findall(r'.{8}',data)
    for i in data:
        ip_list.append(str(int(i,2)))
    return '.'.join(ip_list)
while True:
    try:
        num = change_ipaddr(input())
        ip = change_number(input())
        print(num)
        print(ip)
    except:
        break

1 import re
 2 
 3 s = input()
 4 # A Famous Saying: Much Ado About Nothing (2012/8).
 5 print(s)
 6 
 7 ss=[]
 8 for i in s:
 9     if i.isalpha() == True:
10         ss+=i.upper()
11 print(ss)
12 ss=sorted(set(ss))
13 print(ss)
14 s_new=[]
15 for i in ss:
16     s_new+=re.findall(i,s,flags=re.I)  #列表的运算
17 print(s_new)
18 
19 for j in range(len(s)):
20     if s[j].isalpha() == False:
21         s_new.insert(j,s[j])
22 
23 print(s_new)
24 print(''.join(s_new))

ME

import re
  2 while 1:
  3     try:
  4         s=input().strip()
  5         #把字母取出来，然后去重，排序，得到了字母序列
  6         sl=sorted(set([i.lower() for i in s if i.isalpha()]))
  7         #字母序列
  8         ll=[]
  9         for i in sl:
 10             ll+=re.findall(i,s,re.I)  #从字母表SL中取i,（同时忽略大小写）与原字符串匹配，找到了，就加入到新的字符串中，
 11         #字符串出现的每种字母按原序列添加到列表中
 12         for j in range(len(s)):
 13             if not s[j].isalpha():
 14                 ll.insert(j,s[j])  #将原来的非字母，插入到新字符串的在原字符串中的位置
 15         print(''.join(ll))
 16         #将非字母出现的位置设为原来的字符
 17     except:
 18         break

 

 

2、search的用法 HJ29

import re
while True:
    try:

        s = input()
        ss = ''

        for i in s:
            if re.search('[A-Z]', i):
                if 'A' <= i < 'Z':
                    ss += chr(ord(i) - 1).lower()
                elif i == 'Z':
                    ss += 'a'

            elif re.search('[a-z]', i):
                if 'a' <= i < 'z':
                    ss += chr(ord(i) + 1).upper()
                elif i == 'z':
                    ss += 'A'

            elif re.search('[0-9]', i):
                if '0' <= i < '9':
                    ss += str(int(i) + 1)
                elif i == '9':
                    ss += '0'

            elif re.search('[^0-9a-zA-z]', i):
                ss += i

        print(ss)

    except:
        break

1 #我的
 2 import re
 3 s = input()
 4 ss =s.split(";")
 5 print(ss)
 6 L1=[]
 7 x=0
 8 y=0
 9 powid=(x,y)
10 
11 for i in ss:
12     if re.search('^[ASWD]{1}\d{1,2}$',i):
13         L1.append(i)
14 print(L1)
15 
16 
17 
18 for j in L1:
19     if re.split('\d+',i)[0]=='A':
20         x =x-int(re.split('^A')[1])
21 
22     elif re.split('\d+',i)[0]=='S':
23         y=y-int(re.split('^S')[1])
24 
25     elif re.split('\d+',i)[0]=='D':
26         x=x+int(re.split('^D')[1])
27 
28     elif re.split('\d+',i)[0]=='W':
29         y=y+int(re.split('^W')[1])
30 
31 print(x,y)
32 
33 
34 ####################################################################
35 import re
36 
37 coord = input().split(";")
38 coord = filter(lambda x: re.match("^[ASDW]{1}\d{1,2}$", x), coord)
39 a, b = 0, 0
40 for c in coord:
41     if c[0] == "W":
42         b += int(c[1:])
43     elif c[0] == "S":
44         b -= int(c[1:])
45     elif c[0] == "A":
46         a -= int(c[1:])
47     elif c[0] == "D":
48         a += int(c[1:])
49 
50 print("{},{}".format(a, b))
51 ####################################################################
52 input_list = input().split(';')
53 initial = [0,0]
54 
55 for item in input_list:
56     if not 2 <= len(item) <= 3:
57         continue
58 
59     try:
60         direction = item[0]
61         step = int(item[1:])
62         if direction in ['A', 'D', 'W', 'S']:
63             if 0 <= step <= 99:
64                 if direction == 'A':
65                     initial[0] -= step
66                 elif direction == 'D':
67                     initial[0] += step
68                 elif direction == 'S':
69                     initial[1] -= step
70                 elif direction == 'W':
71                     initial[1] += step
72     except:
73         continue
74 
75 print(str(initial[0]) + ',' + str(initial[1]))
76 
77 ###########################################################
78 
79 #不成熟
80 import re
81 d = input().split(";")
82 result = [0,0]
83 
84 regex = re.compile(r'1[1-9]?[0-9]$')
85 l = []
86 for s in d:
87     if regex.match(s):
88         l.append(s)
89 for item in l:
90     letter = item[0]
91     if letter == "A":
92         result[0] = result[0]-int(item[1:])
93     elif letter == "D":
94         result[0] = result[0]+int(item[1:])
95     elif letter == "S":
96         result[1] = result[1]-int(item[1:])
97     else: result[1] = result[1]+int(item[1:])
98 
99 print(str(result[0]) + ',' + str(result[1]))

参考答案