python list去除空值；list和str互相转换

python list去除空值；list和str互相转换

1、new_list = list(filter(lambda x:x!=None,list))

2、
list---->str

list = ['1','2','3']
print("".join(list))

list = [1,2,3]
strlist = [str(x) for x in list]
print("".join(strNums))

str---->list

num = '123'
listnum = list(num)

将list转成字符串,中间用符号分隔

data = [1,2,3,4]
print ",".join(str(i) for i in data)