a = "姓名:{0},年齡:{1}"
print(a.format("小明",18))
?
b = "姓名:{0},年齡:{1},{0}是個學生"
print(b.format("小明",18))
?
c = "姓名:{name},年齡:{age}"
print(c.format(age=19,name="小明"))

print("{:*>8}".format("245"))
?
print("我是{0},我喜歡語文{1:*<8}".format("小明","666"))
?
print("我是{0},我喜歡語文{1:*>8}".format("小明","666"))

a = "{0},錢:{1:.2f}"
print(a.format("小明",3333.23456))

test_0="{0:.2f}"
print(test_0.format(3.1415926))
?
test_1="{0:+.2f}"
print(test_1.format(3.1415926))
?
test_2="{0:.0f}"
print(test_2.format(3.1415926))
?
test_3="{0:0>2d}"
print(test_3.format(5))
?
test_4="{0:x<4d}"
print(test_4.format(5))
?
test_5="{0:,}"
print(test_5.format(1000000))
?
test_6="{0:.2%}"
print(test_6.format(0.25))
?
test_7="{0:.2e}"
print(test_7.format(10000000000))
?
test_8="{0:10d}"
print(test_8.format(13))
?
test_9="{0:<10d}"
print(test_9.format(13))
?
test_10="{0:^10d}"
print(test_10.format(13))