==============模块==================
1.模块的调用
import 执行的两件事
1.引入变量名称
2.执行导入文件
#import
from cal import *#不推荐,不知道后面的人使用是那个
from cal import add
from cal import sub
#包是用来组织模块的文件
导入包就用的是from ** import *
层与层之间用..
if __name__='__main__'
执行2个作用：
第一个是被调用不会全部执行，第二个是
1.如果在被调用的文件里面，在被调用的时候不会执行，
2.不会被调用
模块介绍
1.os sys time json eval xml .conf logger re 模块*正则表达式
============import功能介绍============================
#import 会把全部的执行一遍
import os
import sys
import cal#执行2件事情,第一先全部执行一遍，第二把传递过去的再执行一次
a=(cal.add(1,4))
b=(cal.sub(3,7))
print(a)
print(b)
#import执行两件事情
#1.执行调用的文件
#2.
print(sys.path)#sys.path 就是执行文件的路径
================import调用功能的使用=================
import time
# x='hello'
# a=time.process_time()
# print(a)
from web.web1.web3.cal import add
#print(add(1,7))
from web.web1 import web3#执行web3__init__文件，唯一一种不支持的调用方式
print(__name__)
========tag练习====================
import os
tag=True
while tag:
print('lever')
choice=input("lever>>").strip()
if choice == 'quit': break
if choice == 'quit_all': tag == False
while tag:
print("lever2")
choice=input('lever2>>').strip()
if choice == 'quit': break
if choice == 'quit_all': tag == False
while tag:
print('lever3')
choice=input("lever3>>").strip()
if choice == 'quit':break
if choice == 'quit_all':tag==False
os.rename('a.txt','a.txt.bak')
======================随机函数============
import random
ret=random.random()
print(ret)
res=random.randint(1,3)
print(res)
rea=random.randrange(1,3)
print(rea)
print(random.choice([1,'23',[3,4],['sf','af']]))#一个
print(random.sample([11,22,33,44,55],2))#两个
red=[1,3,4,46,61]
random.shuffle(red)
print(red)
def v_code():
ret=""
for i in range(5):
num=random.randint(0,9)
alf=chr(random.randint(65,122))
s=str(random.choice([num,alf]))
ret+=s
return ret
print(v_code())
=================time函数=================
import time
#时间戳
print(time.time())#是一个秒 是1970年1月1日 unix时间
print(time.localtime())#当地时间
t=time.localtime()
print(t.tm_year)
print(t.tm_wday)
print(t.tm_yday)
print(time.gmtime())#结构化时间UTC
#字符串时间
#将结构化时间转化为时间戳
print(time.mktime(time.localtime()))
------------将结构化时间转化成字符串时间
print(time.strftime("%Y-%m-%d %X",time.localtime()))
#------将字符串时间转化为结构化时间
print(time.strptime("2018:06:03:18:20:36","%Y:%m:%d:%X"))
#固定式时间格式看时间
print(time.asctime())
print(time.ctime())
import datetime
print(datetime.datetime.now())
=========================re正则表达式=================
import re
print(re.findall(r"123","123"))
=======================文件处理完整版本============
#strip()去除左右两边的空额
#eval()提取数据类型，
#1.函数
#2.文件处理
#3.tag的用法
#4.程序的解耦
import os
#def fild_handle(backend_data,res=None,type='fetch'):
def file_handle(filename,backend_data,record_list=None,type='fetch'): #type fetch append change
new_file=filename+'_new'
bak_file=filename+'_bak'
if type=='fetch':
r_list=[]
#with open('haproxy.conf','r') as read_f:
with open(filename,'r') as f:
tag = False
for line in f:
if line.strip()==backend_data:
tag=True
continue
if tag and line.startswith('backend'):
break
if tag and line:
r_list.append(line.strip())
for line in r_list:
print(line)
return r_list
elif type =='append':
with open(filename,'r') as read_file,\
open(new_file,'w') as write_file:
for r_line in read_file:
write_file.write(r_line)
for new_file in record_list:
if new_file.startwith('backend'):
write_file.write(new_file+'\n')
else:
write_file.write('%s%s\n'%(''*8,new_file))
os.rename(filename,bak_file)
os.rename(new_file,filename)
os.remove(bak_file)
elif type=='change':
with open(filename,'r') as read_file,\
open(new_file,'w') as write_file:
tag=False
has_write=False
for r_line in read_file:
if r_line.strip() == backend_data:
tag=True
continue
if tag and r_line.startswith('backend'):
tag=False
if not tag:
write_file.write(r_line)
else:
if not has_write:
for new_file in record_list:
if new_file.startwith('backend'):
write_file.write(new_file+'\n')
else:
write_file.write('%s%s\n'%(''*8,new_file))
has_write=True
os.rename(filename,bak_file)
os.rename(new_file,filename)
os.remove(bak_file)
# #ret=[]
# for read_line in read_f:
# if read_line.strip() == backend_data:
# tag=True
# continue
# if tag and read_line.startswith('backend'):
# break
# if tag:
# print('\033[1;45m%s\033[0m'%read_line,end='')
# ret.append(read_line)
# return ret
# if type=='change':
# with open('haproxy.conf', 'r') as read_f, \
# open('haproxy.conf_new', 'w') as write_f:
# tag = False
# has_write = False
# for read_line in read_f:
# if read_line.strip() == backend_data:
# tag = True
# continue
# if tag and read_line.startswith('backend'):
# tag = False
# if not tag:
# write_f.write(read_line)
# else:
# if not has_write:
# for record in res:
# write_f.write(record)
# has_write = True
# os.rename('haproxy.conf', 'haproxy.conf.bak')
# os.rename('haproxy.cong_new', 'haproxy.conf')
# os.remove('haproxy.bak')
def fetch(data):
# print('\033[1;43m这是查询功能\033[0m')
# print('\033[1;43m用户数据是\033[0m',data)
# backend_data='backend %s'%data
# return fild_handle(backend_data)
backend_data='backend %s'%data
return file_handle('haproxy.conf',backend_data,type='fetch')
def add(data):
backend=data['backend']
record_list=fetch(backend)
current_record='server %s %s weight %s maxconn %s'%(data['record']['server'], \
data['record']['server'], \
data['record']['weight'], \
data['record']['maxconn'])
backend_data='backend %s'%backend
if not record_list:
record_list.append(backend_data)
record_list.append(current_record)
file_handle('harpoxy.conf',backend_data,record_list,type='append')
else:
record_list.insert(0,backend_data)
if current_record not in record_list:
record_list.append(current_record)
file_handle('harpoxy.conf',backend_data,record_list,type='change')
def remove(data):
backend=data['backend']
record_list=fetch(backend)
current_record='server %s %s weight %s maxconn %s' %(data['record']['server'],\
data['record']['server'],\
data['record']['weight'],\
data['reocrd']['maxconn'])
backend_data='backend %s'%backend
if not record_list or current_record not in record_list:
return print('\033[33;1m无记录\033[0m')
else:
#处理record_list
record_list.insert(0,backend_data)
record_list.remove(current_record)
file_handle('haproxy,conf',backend_data,record_list,type='change')
def change(data):
print('这是修改功能')
print("用户输入的数据时%", data)
backend = data[0]['backend'] # 找到文件的中信息
backend_data = 'backend %s' % backend # backend www.oldboy1.org
old_server_record = '%ssserver %s %s weight %s maxconn %s\n' % ('' * 8, data[0]['record']['server'],
data[0]['record']['server'],
data[0]['record']['weight'],
data[0]['record']['maxconn'])
new_server_record = '%ssserver %s %s weight %s maxconn %s\n' % ('' * 8, data[1]['record']['server'],
data[1]['record']['server'],
data[1]['record']['weight'],
data[1]['record']['maxconn'])
print('用户想要修改的记录是', old_server_record)
res = fetch(backend)
print('来自change函数--》》', res)
if not res or old_server_record not in res:
return '你要修改的记录不存在'
else:
index = res.index(old_server_record)
res[index] = new_server_record
res.insert(0, '%s\n' % backend_data)
file_handle(backend_data,res=res,type='change')
def qita():
pass
def delete():
pass
if __name__=='__main__':
print("test")
msg='''
1.查询
2.添加
3.修改
4.删除
5.退出
'''
menu_dic={
'1':fetch,
'2':add,
'3':remove,
'4':change,
'5':exit,
'6':qita,
}
while True:
print(msg)
choice=input('输入你想要的选项:').strip()
if not choice:continue
if choice=='5':break
#date='www.oldboy1.org'
data=input('输入你的数据：').strip()
#menn_dic[choice](data)==fetch(data)
if choice != '1':
data=eval(data)
menu_dic[choice](data)
#res=msg_dic[choice](data)
#print('最终的结果是',res)
#[{'backend':'www.oldboy1.org','record':{'server':'2.2.2.4','weight':20,'maxconn':3000}},{'backend':'www.oldboy1.org','record':{'server':'2.2.2.5','weight':30,'maxconn':4000}}]
day21函数的文件处理和模块
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转载自blog.csdn.net/qq_37311616/article/details/80561057
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