Python一些代码

1.九九乘法表

print('\n'.join([' '.join(["%2s ×%2s = %2s"%(j,i,i*j) for j in range(1,i+1)]) for i in range(1,10)]))
#等价于以下语句:
for i in range(1,10):
print("")
for j in range(1,i+1):
print("%2s ×%2s = %2s"%(j,i,i*j),end = " ")

结果:

1 × 1 = 1
1 × 2 = 2 2 × 2 = 4
1 × 3 = 3 2 × 3 = 6 3 × 3 = 9
1 × 4 = 4 2 × 4 = 8 3 × 4 = 12 4 × 4 = 16
1 × 5 = 5 2 × 5 = 10 3 × 5 = 15 4 × 5 = 20 5 × 5 = 25
1 × 6 = 6 2 × 6 = 12 3 × 6 = 18 4 × 6 = 24 5 × 6 = 30 6 × 6 = 36
1 × 7 = 7 2 × 7 = 14 3 × 7 = 21 4 × 7 = 28 5 × 7 = 35 6 × 7 = 42 7 × 7 = 49
1 × 8 = 8 2 × 8 = 16 3 × 8 = 24 4 × 8 = 32 5 × 8 = 40 6 × 8 = 48 7 × 8 = 56 8 × 8 = 64
1 × 9 = 9 2 × 9 = 18 3 × 9 = 27 4 × 9 = 36 5 × 9 = 45 6 × 9 = 54 7 × 9 = 63 8 × 9 = 72 9 × 9 = 81

2.python print()打印不换行的方法:

print(内容,[end])
(1)end为可选参数,默认为换行【end = "\n"】;
(2)end设置为空字符可以阻断换行【end = ""】;
(3)end也可以设置为任意字符串【end = "++"】。

python中print输出格式:

①可用加号连接【print("i " + "love " + "you")】;②逗号连接会自动在连接串之间加上空格【print("i","love","you")】;③也可直接连接。

python中print其他输出格式有:

Python中 ""与''是完全一样的

print("Hello World!") # 直接打印字符串
print('Hello World!') # 对于python,单引号也可以表示字符串
name = 'Tom' # 自定义变量,弱类型,不同于C++等强类型
year = 2018 # 自动匹配相当于C++的int型
print(year) # 打印变量的内容
print(name)
print("Hello " + name) # 字符串可以跟其他类型相连
print("I " + "love " + "you") # 可用加号连接
print("I","love","you") # 逗号连接会自动在连接串之间加上空格
print("I ""love ""you") # 也可直接连接
print( "Hello {0}".format(name) ) # 带格式输出,{0}是指输出的第0个元素,同理{1}为第1个元素,{2}为第2个...
print( "I am %s, today is %d year"%(name, year) ) # 类似于C++的格式输出,同理%f是浮点数...
print( f"Today is {year}") # f字符串,{}中为元素
for i in range(0,5): # for循环的一种,循环范围range[0:5),左闭右开区间
print(i) # print()自动换行
print(i, end='\n') # end='',引号中是两个内容之间的间隔,加上end不换行,除非指定 end='\n' 换行
posted @   近我者赤  阅读(10)  评论(0编辑  收藏  举报
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