list排序，和打印
l = [2, 4, 3, 5]
str = "bcdea"
def badIterable():
i = 0
iterable = ["a", "b", "c"]
for item in iterable:
print(i, item)
i += 1
def goodIterable():
iterable = ["a", "b", "c"]
for i, item in enumerate(iterable):
print(i, item)
#结果：[(0, 'a'), (1, 'b'), (2, 'c')]
def listIterable():
le = list(enumerate('abc'))
return le
#结果：[(1, 'a'), (2, 'b'), (3, 'c')]
def listIterable1():
le = list(enumerate('abc', 1))
# 正序
def sortList(li):
li.sort()
return li
# 倒序
def reverseList(li):
# li.reverse()
temp = li[::-1]
print(temp)
return temp
set的使用
# 打印
def testSet():
my_set = {i * 15 for i in range(100)}
print(my_set)
# 交集
def intersection():
x = set("span")
y = set("pta")
print(x&y)
# 合集
def collection():
x = set("span")
y = set("pta")
print(x|y)
# 差集
def subtract():
x = set("span")
y = set("pta")
print(x-y)
#去掉重复数据
def removeRepeat():
a = [11,22,33,44,11,22]
b = set(a)
print(b)
c = [i for i in b]
print(c)
foo = "t1m3a3pp4mt"
print("".join(list(set(foo)))[::-1]) # 去掉重复字符串，倒序排列
print("".join(list(set(foo)))[::1]) # 去掉重复自父亲，正序排列
