08 连接和顺序列表

#连接

s = 'alex'
s1 = '_'.join(s)    #连接
print(s1)       #a_l_e_x

li = ['alex','wusir','egon','女神','taibai']
s = ' + '.join(li)
print(s)        #alex + wusir + egon + 女神 + taibai

#str-->list   split()
#list-->str   join()

#range 按顺序的数字列表

for i in range(0,10):
    print(i)        #0,1,2,3,.....9
for i in range(10):
    print(i)        #0,1,2,3,.....9
for i in range(0,10,3):
    print(i)        #0,3,6,9
for i in range(10,0,-3):
    print(i)        #10,7,4,1

#循环打印每一个元素

li = [1,2,3,5,'alex',[2,3,4,5,'taibai'],'bydz']
for i in li:
if isinstance(i, list):    #判断类型
        for j in i:
            print(j)
    else:
        print(i)
#执行结果
# 1
# 2
# 3
# 5
# alex
# 2
# 3
# 4
# 5
# taibai
# bydz

 或者

for i in range(len(li)):
    if type(li[i]) == list:
        for j in li[i]:
            print(j)
    else:
        print(li[i])