python3基础03 lambda+string模块+re模块

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# -*- coding: utf-8 -*-
# Author       :   szy
# Create Date  :   2019/10/17
 
from random import randint as shanshanzi
import operator
 
# del
# aList = [1, 2, 3]
# del aList
# print(aList)
 
# help("list.sort")
 
# lambda 排序
# data = []
# data.append({"province": "shanghai", "order_price": 200, "user_count": 50, "total_price": 10000})
# data.append({"province": "beijing", "order_price": 100, "user_count": 100, "total_price": 10000})
# data.append({"province": "shenzhen", "order_price": 300, "user_count": 100, "total_price": 30000})
# sort排序，reverse=True倒排，key按照某种关系排序
# data.sort(key=lambda x: (x['user_count'], -x['total_price']), reverse=True)
# data.sort(key=lambda x: (x['province']), reverse=True)
# print(data)
# for d in data:
#     print(d)
 
 
# 对象比较支持多个比较操作
# print(3 < 4 < 7)  # 相当于 (3<4) and (4<7)
# print(4 > 3 == 3)  # 相当于 (4>3) and (3==3)
# print(4 < 3 < 8 != 2 < 7)    # 从左到右
 
 
# Java中的Collections.reverse(arrayList);
# foolist = [123, 'abc', 342.23, 'xyz']
# print(foolist[::-1])
# print(foolist[::-2])
# Java中的Collections.sort(arrayList);
# print(sorted(foolist))
 
 
# is 对象的内存最终指向的地址
# == 对象最终指向的数值
# foo1 = foo2 = 4.3
# print(foo1 == foo2)
# print(foo1 is foo2)
#
# foo1 = 4.3
# foo2 = foo1
# print(foo1 == foo2)
# print(foo1 is foo2)
#
# print(id(foo1))
# print(id(foo2))
#
#
# foo1 = 4.3
# foo2 = 1.3 + 3.0
# print(foo1 == foo2)
# print(foo1 is foo2)
#
# print(id(foo1))
# print(id(foo2))
 
 
# cmp(a,b) 比较大小 -1, 0 ,1
# print(operator.le(7, 7))
# print(operator.eq("abs", "azs"))
 
 
# round() 四舍五入
# print(round(100.10))
# print(round(100.49))
# print(round(100.50))
 
 
# random 取随机数
# print(shanshanzi(1, 100))
 
# in 操作
# print('bc' in 'abcd')
# print('n' in 'abcd')
# print('nm' not in 'abcd')
 
 
# string 模块
# print("hello".capitalize())
# print("HELLO".lower())
# print("hello".upper())
# print("asdadada asdada".split())
# print("              adsd         ".rstrip())
# print("              adsd         ".lstrip())
# print("              ad  sd         ".strip())
 
 
# # re 模块
import re
# Python提供了两种不同的原始操作:match和search.match是从字符串的起点开始做匹配,而search是从字符串做任意匹配.
print("-----------------------------------------")
m = re.search("^ab+", "asdfabbbb")
print(m)
m = re.search("ab+", "asdfabbbb")
print(m)
print(m.group())
m = re.match("c", "cabcdef")
print(m.group())
pattern = re.compile("c")
m = pattern.match("cabcdef")
print(m.group())