4.6 每日一练

Posted 2021-03-02 ljy123

下面程序的输出结果是
	d = lambda p:p*2  
	t = lambda p:p*3  
	  
	x = 2  
	x = d(x)  
	x = t(x)  
	x = d(x)  
	print(x)
24

以下函数需要在其中引用一个全局变量k, 请填写语句
	def fun():  
	   __________  
	   k = k+1

def fun():
    global k
    k = k + 1

 

用Python实现99乘法表(用两种不同的方法实现)

for i in range(1, 10):
    for j in range(1, i+1):
        print(‘{}x{}={}	‘.format(j, i, i*j), end=‘‘)
    print()

i = 1
while i <= 9:
    a = 1
    while a <= i:
        print("%d*%d=%2d" % (i,a,i*a),end=" ")
        a+=1
    print()
    i+=1

 

一个大小为100G的文件etl_log.txt, 要读取文件中的内容, 写出具体过程代码？

with open(‘etl_log.txt‘,‘r‘,encoding=‘utf-8‘)as a:
    for i in a:
        info = a.readlines()
        print(info)
fp = open("文件名","模式","编码集") #迭代器