1、创建python文件,文件名为:testlistadd.py;
2、编写代码,在原有list的每个元素前面加上字符‘1’;
old_list = ['a','b','c','d']
new_list = ['1'+x for x in old_list]
print(new_list)
3、在窗口中右击,并选择‘在终端中运行Python文件’选项,执行python代码;
4、在‘终端’窗口中,查看执行结果,可以发现满足所需,即在所有元素前面都加了字符串‘1’。
l = ['abc','def','xyz']
map(lambda x: 'str_'+x, l);
用列表推导式就行
list1 = ['a','b','c','d']
new_list = ['!'+x for x in list1]
print(new_list)
def make_great(names):
for i in range(len(names)):
names[i]="the great" + names[i]
name_list=['a','b','c']
make_great(name_list)
print(name_list)
def make_great(magicians):
i = 0
while i < len(magicians):
magicians[i] = "the Great " + magicians[i]
i += 1