Python自动化--语言基础2--运算符、格式化输出、条件语句、循环语句、列表、元组

1 if a==b:
2     print(1)
3 else:
4     print(2)

1 a = 0
2 b = 10
3 if not(a and b):  #有里往外看循环
4     print(1)
5 else:
6     print(2)

 1 a = 1
 2 b = 20
 3 c = [1,2,3,4,5]
 4 if a in c:
 5     print("a在c列表中")
 6 else:
 7     print("a在c列表中")
 8 
 9 if b not in c:
10     print("b不在c列表中")
11 else:
12     print("b在c列表中")

1 if a is b:
2     print("a和b的id一样")
3 else:
4     print("a和b的id不一样")
5     print(id(a))
6     print(id(b))

1 print("a = %.2f"%(a*3))  #a = 3.00
2 print("xiaoxiaon")
3 print("我的名字是%s,今年%d"%('小小',27))

1 flag = False
2 name = "xiao"
3 if name == "qia":
4     flag = True
5     print("欢迎来到python全栈测试工程师课堂")
6 else:
7     print(name)

1 num = 9
2 if num>=0 and num <=10:
3     print("very well")

1 count = 0
2 while count<9:
3     print("count=",count)
4     count+=1
5 print("while循环结束")

 1 i = 1
 2 while i<10:
 3     i+=1
 4     if i%2 > 0:
 5         continue
 6     print(i)
 7 print("==============================")
 8 i = 1
 9 while True:
10     print(i)
11     i+=1
12     if i>10:
13         break

1 for index in range(0,3):  #等同于range（3）
2     print(index)          #打印0，1，2

1 index = 0
2 starnames = ['今年','明年','后年']
3 for index in range(len(starnames)):
4     print(starnames[index])

1 L = ["我","shi",520]
2 L[1]="是"             #修改下标1的值
3 print(L)

1 del L[1]     #删除下标为1的值
2 del L[1:3]   #删除下标为1和2的值 

1 L.append("呜哈哈")
2 print(L)

1 namee = ["a","b","c",345,"love"]
2 #切片
3 print(namee[:3])               #输出结果：['a', 'b', 'c']
4 print(namee[-3:])              #输出结果：['c', 345, 'love']
5 print(namee[-3:][-1][0])       #输出结果：l
6 
7  #步长的概念
8 print(namee[::2])               #输出结果：['a', 'c', 'love']

 1 tup1 = (1,2,3,4)
 2 tup2 = (8,9)
 3 tup3 = tup1 + tup2
 4 print(tup3)
 5 
 6 # del tup3  #元组中的元素值是不允许删除的，但可以使用del语句来删除整个元组
 7 # print(tup3)   #删除元组之后打印就会报错
 8 
 9 print(len(tup3))    #打印元组的个数
10 print(21 in tup3)    #判断元素是否在元组中
11 
12 tup_good = (2,44,76,0,-26)
13 print(len(tup_good))
14 print(max(tup_good))
15 print(min(tup_good))
16 
17 print(list(tup_good))    #元组转换成列表

 1 x = 1+2.0+3
 2 print(x)
 3 x=17
 4 x*=3
 5 print(x)
 6 x=17
 7 x/=3
 8 print(x)
 9 x=15
10 x = x/3
11 print(x)
12 x=15.0
13 x = x/3
14 print(x)
15 x=17
16 x =x//3
17 print(x)
18 x=17
19 x = x%3
20 print(x)
21 x=3
22 x = x**3
23 print(x)

 1 LI = ["快乐大本营",2016,"我是歌手"]
 2 print(LI[1])
 3 LI.append("非诚勿扰")
 4 print(LI)
 5 LI.extend("男生女生")
 6 print(LI)
 7 LIS=[1,2,3]
 8 LI.extend(LIS)
 9 print(LI)
10 
11 LI.insert(1,2017)    #插入的下标位置和具体的值
12 LI.insert(-1,2017)   #实际上是插入在倒数第二位13 
13 LI.pop(1)            #删除下标是1的元素
14 16 LI.remove(2016)      #移除元素2016
15 print(LI)
16 
17 print(LI.index("快乐大本营"))  #获取下标
18 print(LI.count("生"))         #统计出现的次数

 1 正向和反向排序
 2 list_sort = [2,3,1,4]
 3 
 4 list_sort.sort()       #sort方法是重新排序列表不生成新的列表
 5 print(list_sort)
 6 
 7 list_sorted = sorted(list_sort)  #sorted排序列表并生成新的列表
 8 print(list_sorted)
 9 
10 
11 list_sort.reverse()    #倒排
12 print(list_sort)

1 #替换列表中所有的3为3a
2 num = ["alex","jack",3,34,45,56,76,87,78,45,3,3,3,87686,98,76]
3 for i in range(num.count(3)):
4     ele_index = num.index(3) #获取首次3出现的坐标
5     num[ele_index]="3a"      #修改3为3
6     print(num)

 1 lis = [56,12,1,8,354,10]
 2 for i in range(0,len(lis)):
 3     for j in range(i+1,len(lis)):
 4         if lis[i] > lis[j]:
 5             lis[i],lis[j] = lis[j],lis[i]
 6 print(lis)
 7 
 8 自带方法进行列表的排序
 9 lis.sort()
10 print(lis)

1 L = ["Bart","Lisa","Adam"]
2 for i in range(len(L)):
3     print("Hello,%s"%L[i])

1 list1 = [2, 3, 8, 4, 9, 5, 6]
2 list2 = [5, 6, 10, 17, 11, 2]
3 
4 list3 = list1+list2
5 print(list3) #不去重只进行两个列表的组合
6 print(set(list3))  #去重,类型为set需要转换成list
7 print(list(set(list3)))

1 list = ['a', 'b', 'c', 'd', 'e']
2 print(list[10:])

1 numbers=[1,2,3,4]
2 numbers.append([5,6,7,8])
3 print(len(numbers))