python3之输入输出格式

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#encoding:utf-8

#有多组输入数据，但组数不确定
while True:
    try:
        a, b = map(int, input().split(' '))     #以空格隔开
        print(a + b)                            #map(int, list)把每个list的元素转为int型
    except EOFError:    #捕捉异常
        break

#先输入一个整数，告诉我们接下来有多少组数据，然后在输入每组数据的具体值。，
n = int(input())
for temp in range(n):       #range(5)等价于list[0, 1, 2, 3, 4]
    a, b = map(int, input().split(' '))
    print(a + b)

# 有多组输入数据，没有具体的告诉有多少组,但是却知道遇见什么结束
while True:
    a, b = map(int, input().split())
    if a == 0 and b == 0:
        break
    else:
        print(a + b)

#有多组输入数据，对于每组输入数据的第一个数代表该组数据接下来要输入数据量
while True:
    try:
        lst1 = list(map(int, input().split()))
        n, lst = lst1[0], lst1[1:]
        sum = 0     #对后面n个数据求和
        for i in range(n):
            sum += lst[i]
        print(sum)
    except EOFError:
        break

#把输入的字符串分成单个字符处理
while True:
    lst = list(input())
    print(lst)


#print输出不换行
print ("Hello ", end='')    #输出为： Hello World!
print ("World", end='')
print("!")

#打印字符串
print("His name is %s"%("zhangsan"))    #输出为： His name is zhangsan

#打印整数
print("He is %d years old"%(25))    #输出为： He is 25 years old

#打印浮点数
print("His weight is %f"%(155.5))   #输出为： His weight is 155.500000

#打印浮点数并指定保留小数点位数
print("His weight is %.2f"%(155.5))   #输出为： His weight is 155.50

#指定占位符宽度
print("Name:%10s Age:%3d Height:%8.2f"%("zhangsan", 25, 155.5))
#输出为： Name: zhangsan Age: 25 Height: 155.50

#指定占位符宽度(左对齐)
print("Name:%-10s Age:%-3d Height:%-8.2f"%("zhangsan", 25, 155.5))
#输出为： Name:zhangsan Age:25 Height:155.50

#用0当占位符
print("Name:%-10s Age:%03d Height:%08.2f"%("zhangsan", 25, 155.5))
#输出为： Name:zhangsan Age:025 Height:00155.50

#输出16进制，十进制，8进制整数
n = 100
print("hex = %x, dec = %d, oct = %o"%(n, n, n))   #输出为： hex = 64, dec = 100, oct = 144

#指数输出
print("%.3e" %2016) #输出2.016e+03,也可以写大E

#输出列表
lst = [1,2,3,4,'python']
print (lst)    #输出为： [1, 2, 3, 4, 'python']


#format的使用：通过{}和:来代替传统%方式

#使用位置参数
list = ['zhangsan', 20]
print("my name is {}, age is {}".format('zhangsan', 20))    #输出为： my name is zhangsan, age is 20

print("my name is {1}, age is {0}".format(20, 'zhangsan'))     #输出为： my name is zhangsan, age is 20

print("my name is {1}, age is {0} and I am {1}".format(20,'zhangsan'))
#输出为： my name is zhangsan, age is 20 and I am zhangsan

print("my name is {}, age is {}".format(*list))     #输出为: my name is zhangsan, age is 20

print("{a[0]}{a[1]}{a[2]}".format(a=["spkk",".","cn"])) #输出spkk.cn

#使用关键字参数（使用字典）
student = {'name': 'zhangsan', 'age': 20}
print("my name is {name}, age is {age}".format(name = 'zhangsan', age = 20))
#输出为： my name is zhangsan, age is 20

print("my name is {name}, age is {age}".format(**student))
#输出为： my name is zhangsan, age is 20

#填充和格式化
print("{:,}".format(123456))#输出1234,56

print("{a:x^8}".format(a="8"))#输出xxx8xxxx,填充x