#(1). 把字典寫成x=a,y=b,z=c的列表推導式dic =
# for a,b in dic.items():
# print(a,b)
res = [a+"="+b for a,b in dic.items() ]
print(res)
# (2).把列表中所有字元變成小寫 ["addd","ddddd","ddaa","sss"]
lst = ["addd","ddddd","ddaa","sss"]
res = [i.lower() for i in lst ]
print(res)
# (3).x是0-5之間的偶數,y是0-5之間的奇數 把x,y組成一起變成元組,放到列表當中
# (0 2 4 )
# (1 3 5)
# (0 1) (0 3) (0 5)
# (2 1) (2 3) (2 5)
# (4 1) (4 3) (4 5)
lst_new =
for i in range(0,6):
if i % 2 == 0:
for j in range(0,6):
if j % 2 == 1:
print(lst_new)
# 寫法一
res = [(i,j) for i in range(0,6) if i % 2 == 0 for j in range(0,6) if j % 2 == 1 ]
print(res)
lst_new2 =
for i in range(0,6):
for j in range(0,6):
if i % 2==0 and j %2 ==1:
print(lst_new2)
# 寫法二
res = [(i,j) for i in range(0,6) for j in range(0,6) if i % 2 == 0 and j % 2 == 1 ]
print(res)
# (4).使用列表推導式 製作所有99乘法表中的運算
for i in range(1,10):
for j in range(1,i+1):
# print("%d*%d=%2d " % (i,j,i*j))
print(" * = ".format(i,j,i*j) ,end="")
print()
# 寫法一
res = [" * = ".format(i,j,i*j) for i in range(1,10) for j in range(1,i+1)]
print(res)
for i in range(9,0,-1):
for j in range(1,i+1):
# print("%d*%d=%2d " % (i,j,i*j))
print(" * = ".format(i,j,i*j) ,end="")
print()
# 寫法二
res = [" * = ".format(i,j,i*j) for i in range(9,0,-1) for j in range(1,i+1)]
print(res)
'''(5)#求m,n中矩陣和元素的乘積
# m = [ [1,2,3],
# [4,5,6],
# [7,8,9] ]
# n = [ [2,2,2],
# [3,3,3],
# [4,4,4] ]
=>實現效果1 [2, 4, 6, 12, 15, 18, 28, 32, 36]
=>實現效果2 [[2, 4, 6], [12, 15, 18], [28, 32, 36]]
'''m = [[1,2,3],[4,5,6],[7,8,9]]
n = [[2,2,2],[3,3,3],[4,4,4]]
# m[0][0] * n[0][0] = 2
# m[0][1] * n[0][1] = 4
# m[0][2] * n[0][2] = 6
# m[1][0] * n[1][0] = 12
# m[1][1] * n[1][1] = 15
# m[1][2] * n[1][2] = 18
# m[2][0] * n[2][0] = 28
# m[2][1] * n[2][1] = 32
# m[2][2] * n[2][2] = 36
# 效果1 # i=> 0 1 2 j=> 0 1 2 i動的慢 j動的塊
res = [m[i][j] * n[i][j] for i in range(3) for j in range(3) ]
print(res) #[2, 4, 6, 12, 15, 18, 28, 32, 36]
#=>實現效果2 [ [2, 4, 6], [12, 15, 18], [28, 32, 36] ]
#
'''第一步遍歷三個空列表
[ for i in range(3) ]
第二部在空列表裡面在寫乙個推導式遍歷對應的元素
[m[i][j] * n[i][j] for j in range(3)]
'''res = [ [m[i][j] * n[i][j] for j in range(3)] for i in range(3) ]
print(res) #[[2,4,6], , ]
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